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WinCamD™-UXXX Series User Manual

1. The beam centroid in the measurement plane does reflect the beam pointing WinCamD Series 3 11 3 2 Quick Start Tutorial The lens and instrument may be supplied by DataRay as a prealigned system or may be mounted on an optical bench or table Use the spreadsheet amp contact the factory for details and lens suggestions for your beam Accuracy Typically an accuracy of 0 1 to 0 05 mrad should be achievable To simply adjust an input beam assembly for best collimation minimize the value of 2W in the measurement plane Contact the factory for accuracy and misalignment sensitivity calculations for your beam Parameter Input box shown Guatemala Sill Parameter Input box shown Parameter Input x It allows you to set a different integral energy calculation percent If you change this the calculation is no longer ISO 11146 compliant You may use this facility to exclude energy in Ponca the wings or in structure distant from the main beam Once you get away from the 99 default value it is your call what is appropriate we cannot provide advice on the appropriateness or not of alternative percentage settings Currently disabled it will be revived in a future version Sigma power inclusion percent 3 2 3 Set Diameter Display Mode Q Under Setup choose Numeric display Display modes Shimeric Display Modes XXX Y um is the default choice Cancel 3 12 WinCamD Series 3 2 4 Set Pass Fail Q Left click
2. A 4 WinCamD Appendices 3 Beam Diameter based on clip level WinCamD measures the outer diameter at the clip level It must achieve this whether or not a pixel is at the specified clip level intensity To do this it relies upon inter pixel linear intensity interpolation The magnified orange profile portion shown against the light green grid shows the profile intensity y axis versus position x axis for the left hand edge of a profile There are pixels above and below but not on the blue line indicating the requested clip level Rather than simply taking the outer pixel as a diameter basis WinCamD determines the position of the two adjacent pixels above and below the requested clip level and performs a linear interpolation between these two values I E the software determines the position where the profile would have crossed the clip level if the imager pixel size were infinitely small It then makes the same determination for the right hand side of the full profile The difference between these two interpolated position values determines the diameter for the specified clip level Since these interpolated values are not quantized by the pixel location the measured beam diameter is not quantized by the pixel size Smallest beam size Understanding this inter pixel intensity interpolation leads to an understanding that accuracy will degrade as we move to smaller beams The profile of a 100 um Gaussian beam show
3. ccc cece cece cece eeeeeeeeeeeeesaeauaes 4 1 4 1 TERMS AND FEATURES okeru te venat as Raduauaanenmaneden vias san E TAO EAEAN 4 1 4 2 PULSED BEAM CAPTURE INITIAL SETUP ccccecceucuccuueuusuveueeuseuseusuuuausaus 4 2 4 3 AUTO TRIGGER MODE assacieucsascceaatiaetbacunc nitcncnG on saeaaeecutanomee gina xcweusene 4 4 4 4 EXTERNAL TRIGGER MODE sisccscaiadenarsatdncnwseendareneiaucsarcanereswasanduaenewas 4 6 5 LASER ATTENUATION boi aiewess tes ceed bisa edt aaa a 5 1 ove IMPORTANT TERM ea a teed aide tate atau ened deaeaat ema ne dea eaten 5 2 5 2 ATTENUATION OF YOUR BEAM ccceecceceuccceeueuutuueueeuteuteuteuseuteuteusuutanes 5 3 5 3 ADDITIONAL BEAM SAMPLING ATTENUATION cccceeceeuceuueuueeueeuueeuseuueeueeas 5 3 5 4 UM LASER Ss orken E Ru wiauale urea ve ce tute alain d arlene ental an Sls 5 6 5 5 WORKING WITH BEAMS LARGER THAN THE CAMERA v ceeceeueueeuveuseuveuseutaues 5 7 5 5 1 Imaging of the laser beam scattered off a diffusing surface 5 7 5 5 2 Use of a long focal length Mirror ndiesscs son vee cones Sevadeke Tins Gera TaceeateSasanaes 5 7 5 5 3 Use of a long tocallength IVS sicszessciscnic tecnica aden atu ela Sea Gi ata ie eee ee 5 8 APPENDIX A Beamwidth definition amp Measurement APPENDIX B Accuracy Precision amp Resolution APPENDIX C Support Returns Distributors Reps APPENDIX D WinCamD UCM Offset Calibration APPENDIX E Spatial Response Variation Compensation CHAPTER ONE 1 INTRODUCTION 1 1 WELCOM
4. DataRay v6 00R11f Recalled v5 00K5 WinCamD 1 of 1 Exp 0 000ms Filter 0 2 _ Wl 660 0nm Pixels 4 65 4 65 Image 1024 by 1024 F SEES DataRay version x yyz The software version on your PC WinCamD 1 of n The profile number i of n Exp 0 000ms The exposure time of the saved image Filter 0 2 The profile filter setting WI 660 0nm The set wavelength Pixels 4 65x4 65um The effective pixel size Twice the actual value in the default Fast mode Pull down Menus have a quick look Note the existence of keyboard short cuts Section 3 2 describes the pull down menus in more detail File Device Palettes Average Filter Camera View Setup Toolbar Button Bar Accesses frequently used functions Sec 3 3 contains detailed descriptions 2 768 Xo Xp xXu N F Oil lSSIOMIXYBLIA ERCAN 4 If you have no camera installed and are simply evaluating the software then a number of buttons will be grayed out Hover the mouse over any button to see a description of its function If additional buttons appear in later software revs hover the mouse over them to determine their function WinCamD Series Quick Start Tutorial 3 1 4 Main Screen Left Hand Side E Clip levels User set profile clip levels that determine 2Wa and 2Wb The Clip level is the of the peak of the line profile along the m crosshairs See also Sec 3 2 3 Clip b 30 0 Clip a 13 5 The current head status either Ready Starting
5. PRR lt 20 kHz The single pulse saturation energy limit is noted on the upper graph in terms of uJ within the exposure time To avoid multiple pulse capture set the Exposure time at 0 95 PRR If you set an Exposure time gt 1 PRR you will capture more than one pulse and the saturation limit will reduced in proportion to the number of pulses captured The Saturation Limit assumes The ND 4 0 filter in place Single pulse capture with the electronic shutter set at lt 0 95 PRR The gain is set at 1 Total power in excess of 1 W 10 may crack the ND filter Use the graph right to estimate for wavelengths other than those shown Relative Exposure vs Wavelength s 00 300 500 700 900 1100 Wavelength in nm WinCamD Series 1 7 Introduction ND filter transmission WinCamD series Filter Tranmissions ND w Transmission 100 10 _ S F O ay H 1 e ja E E AT g GLE rj E ND4 6 0mm NG1 Tat ND 3 1 NOR 1 mA oo FRR ND2 2 1 mm NG3 ar p E ND1 4 05 mm NGS E goo IR as I m i 53 mm UGA th TCamD ND4 2 8 mm Neg CM coon HH a 200 300 400 SUD 600 YOO 00 YOO 1000 1100 1200 1300 1400 1500 1600 Wavelength in nm Transmission values between 200 nm and 1100 nm values are derived every 5 nm from Schott program Filter 98 Version 1 1US Digitization of the ND4 transmission
6. or Running 2w_Major xxx um 2w_Minor xxx um AN Major 1537 7 um 2w_Mean xxx um Z2W_WMinor 1510 4 um These diameters are calculated for Clip a ai Mean 1573 1 um about the beam centroid for the total image whether or not the beam appears cicular Eff diam 1483 0 um Samples profiles for the calculation are taken every 0 5 Ellipticity 0 93 The minor axis is the diameter at the center of Orientation 79 3 deg the 45 sector that contains the smallest mean z diameter at Clip a crosshair 44 3 deg The major axis is the diameter at 90 to the AC 131 9 um minor axis Yc 32 6 UM The mean diameter is the mean for the whole beam It may be higher than than the minor or the major values If this seems not possible consider a rectangular beam and the answer Peak 30 2 becomes clear Image zoom 1 For ISO 11146 values go to the Setup pull down menu and choose Use ISO 11146 compliant diameters and orientation See the end of Section 3 3 Eff Diam the equivalent diameter of the area above the clip level See p 3 19 Ellipticity 2w minor 2w major Orientation xx x is the orientation of the major axis of the ellipse with respect to the horizontal x axis Crosshair xx x is the angle at which the crosshairs are currently set Xc abs xxx um amp Yc abs or rel are the beam centroid positions These are determined using all pixels in the image above the specified level The default
7. Check the Show Fluence Area box to show the fluence area on the main 2D screen as a white circle or square The default area for the Peak Fluence Aperture is shown on the red grid screen Click on the grid to add pixels to the defined four pixel square shown To save and use what you define press Save To return to the four pixel square press Clean To restore the area that you previously created press Restore You may also enter values and Enable Pass Fail testing of Fluence Test Limits Finally click OK WinCamD Series 3 37 Quick Start Tutorial ca This button allows you to replay the 64 image isis rie ln sese hf tes buffer at a user defined update rate Leave it at 0 0 seconds for PC limited replay speed Press it again to stop the replay Power Bar The auto scaling Power bar function gives an indication of relative power as a scrolling ten sample histogram The power is calculated as the integral of the energy in the image It is not a Enter relative power Enter label calibrated power meter mw Click on the bar to open the dialog box shown Enter the power as measured by Carel a calibrated power meter and the unit of measurement The power bar will then display relative to the measurement entered Relative Power 4 37 mf Full Range 10 If you enter dB or dBm it recognizes these terms and works in logarithmic mode You may also enter 100 as the number and as a label to give answer
8. WinCamD Series 4 7 Capturing Pulsed Lasers impedance may be set at 75 or 1 kQ for output normally set it to 1 kQ To accept a trigger set it to 75 Q If it dos not work verify the electrical pulse shape on an oscilloscope The camera will repeatedly capture images as fast as the software the PC and the Capture Block setting will allow In this setting the shutter is open continuously As requested by the software the accumulated image is moved to the interline transfer register for readout Pulses with an ADC within the set levels will be captured and displayed Pulses which do not meet the criteria will not be displayed The camera card has a peak level detector for every image captured by the ADC If the peak does not lie within the criteria the image is not displayed and no further processing occurs Set an appropriate Exposure time as discussed earlier There are two counters on screen in this mode In the blue line at the top of the screen the image EPT ORES TNE counter of captured images continually cycles from 1 to 64 In the Ready button area a counter counts the number of times since go was pressed that the software sampled the camera to determine whether an image meeting the Minimum and Maximum criteria has been captured If every image is good then these two numbers will be equal If as is frequently the case not all images are good the count in the Ready button area will increase at a gre
9. WinCamD WinCamD WinCamD WinCamD WinCamD WinCamD WinCamD WinCamD WinCamD 2s WinCamD cae WinCtamD gt e WinCamD Eee WinCamD UXXX Series CCD CMOS Beam Imagers User Manual VERY IMPORTANT Read 2 pages This VITAL information is here so that you cannot miss it QuickStart in case you are one of those rare people who do not read manuals 1 Install the software and run it Check that your computer meets the Minimum PC Requirements on page 1 5 Install the software as Administrator Sec 2 4 Open it to load the driver In the Device pull down menu select WinCamD Close the software 2 Install the driver Connect the camera head amp follow the New hardware found wizard to install the driver Do not let it go to the web to find a driver Allow it to install automatically 3 Start the software The camera LED cycles Red Off Green Red Green If it stays Red when the software is on the port is not reporting itself as USB 2 0 In the pull down menu go Device WinCamD The software detects the camera type Remove the dust cap Press j 4 UCM series Does not apply to other cameras Go Alt S set PLS factor 0 9 Calibrate it per App D of this manual 5 TaperCamD series Go Alt S set Pixel multiply factors to rear label value You may hot plug and unplug a camera head from its cable The software will recognize it automatically after a few seconds To avoid camera damage obse
10. to open the Open dialog box Select Sample wcf file and click OK to see a screen similar to that below This real image is the 20 sample average of a single mode fiber output As software upgrades occur the detailed appearance and or the initial settings may change DataRay v6 00R1 1f Recalled v5 00K5 WinCamD 1 of 1 Exp 0 000ms Filter 0 2 WI 660 0nm Pixels 4 65 4 65 Image 1024 by 1024 F P t 2i Xg Xp Xu Feo l8as BHE xY LI Clip a 13 5 Delta 135 8 um Pixel 46774 71 4 Average of 20 Clip b 50 0 T S SErxne BF View 225 Tilt 33 2W_Major 1537 7 um 2W_Minor 1510 4 um Eff diam 1433 0 um Ellipticity 0 98 Orientation 79 8 deg Crosshair 44 3 deg Relative Power 0 00 Full Range 2 Trigger off delay 0 001 ms Yc 32 6 um is Da Imager Gain 1 0 Peak 80 2 W Exposure time 200 0 ms Auto 2Wua 13 5 1538 3 um 2Wva 13 5 1531 5 um 2Wub 50 0 832 1 um 2Wvb 50 0 834 6 um 2S 2 C E re _ _ A T ME B a a E a Scale 800 0 umjdiv Peak 71 7 B 0 2 Scale 800 0 umdiv Peak 71 4 B 0 2 Gain control slide to desired gain oo WinCamD Series 3 3 1 Quick Start Tutorial 3 1 3 Main Screen Top E E E 3 4 The blue streak of Caption bar at the top displays
11. 3 14 Filter 3 25 Gain 3 6 Gaussian fit 3 16 Grids 3 16 Linear 3 15 Measure distance 3 21 Logarithmic 3 15 Normalized linear 3 15 Pan 3 21 Scaling 3 6 3 19 Smoothing 3 25 Widths 3 6 Zoom 3 3 Pull down Menu Bar 3 4 Pull down Menus 3 21 Pulse Pulsed Pulses Chapter 4 Lasers capturing 4 1 Repetition Rate Definition 4 1 Saturation limits 1 7 1 11 Q Quick Start Tutorials 3 1 Hardware 3 41 Software 3 2 R Representatives A 7 Resolution A 4 Results averaging 3 24 Returns A 7 Rotate Image 180 degrees 3 27 A 16 S Stop 3 30 Safety 3 41 Sample Data 3 3 Saturation Power Limits 1 6 1 7 1 11 Save As 3 22 Scale Profile 3 5 Screen Dump to Clipboard 3 9 Second Moment Beam Width 3 10 A 2 Setup 3 27 Short Cut Keys 3 40 Single shot 3 30 SNR 1 3 Software Installation 2 3 Quick Start Tutorial 3 1 Specifications 1 4 Starting Up Hardware 3 43 Software 3 2 Support A 7 Synchronous Trigger Definition 4 1 TaperCamD Artifacts 3 45 Compensation Files App E Outline amp mounting 1 5 1 10 Pixel multiply factor 2 12 3 27 Technical Support A 7 Threshold Damage 1 11 tiff files 3 22 Toolbar Button bar 3 4 3 30 Top hat fit 3 18 Trigger 3 40 4 1 Auto 4 4 External 4 6 U U profiles 3 6 UV Lasers working with 5 6 V V profiles 3 6 Variance Second Moment 3 10 A 2 Visual Basic 2 6 Visual C 2 6 WinCamD W Wander beam 3 37 Wedge Prisms
12. 5 5 Wireframe 3 9 X Y Z Zero Centroid 3 6 Zero level 3 6 Zoom Image 3 3 Profile 3 3 Numeric 2D Image 3 3 3 7 3D View 3 9 4c Second Moment Beam Diameter 3 10 A 2 Appendices WinCamD Index
13. 80 70 60 50 40 30 20 10 0 0 10 WinCamD Normalized Gaussian Intensity Profile 0 8 0 6 0 4 1 e2 0 135 lt 0 20 140 00 10 20 r w Circular Gaussian of Peak versus Included of Power 20 30 40 50 60 70 80 90 100 Included af Power A 1 Appendices 2 Beam Irradiance In order to assess whether the irradiance W mm7 from a given laser might overload a beam profiler it is useful to be able to calculate the peak irradiance From equation 11 the on axis irradiance at r 0 is given by 1 0 2P nw 2 6P 2w W mm for 1 e 13 5 diameter 2w in mm For example e The peak irradiance from a 1 mm diameter 10 mW HeNe is 26 mW mm e The peak irradiance from a 5 mm diameter 5 W Nd Yag is 520 mW mm 3 Second Moment Beam Diameter Conventionally beam diameters have been measured at the 1 e intensity point i e at 13 5 of the maximum intensity For the reason outlined in section 2 2a ISO 11146 mandates the use of a Second Moment definition of beam diameter 2W z 2V2 0 z 12 where the variance o7 z is calculated as E ffr p z r dr do 7 I r z r dr d 13 o z Where I r z is the radial intensity distribution versus angular position along propagation axis Z In more useful x and y terms since these are what actually get measured z2 2 2 ff x x I x y Z dx dy O 5 oo I x y Z dx dy
14. Enable Angular Divergence For full ISO 11146 compliance select Average 5 see Section 3 3 2 Source to imager distance in mm Q In accordance with Section 6 2 of the ISO 11146 Standard the software 0 00 pim calculates the Second Moment by integrating over 99 of the total energy in the profile In order to allow for any baseline tilt the zero levels on either side of the center are treated separately and integration from the centroid is separately performed for 99 of the energy on each side of the centroid See Section 3 5 of Appendix A for Beam Diameter definitions For a broader discussion on Variance see Appendix A Sec 4 To choose the area based option go to the Setup pull down menu and choose Use ISO 11146 compliant diameters and orientation Cancel Q Beam Geometric Angular Divergence Enter a Source to Image distance in mm Remember that the camera chip sits 7 5 mm below the surface of the camera body Check Enable Angular Divergence Choose the unit of measurement Click OK 3 10 WinCamD Series Quick Start Tutorial The software automatically performs a cosine correction the data to allow for the use of a flat measurement plane to measure a spherically diverging beam Gaussian Beam Divergence Measurement Gaussian beams do not follow the same rules as incoherent beams described by geometric optics For a Gaussian beam it may be shown that When a Gaussian beam passes through a lens the far field di
15. Oey ay 2 2y 2 I x y Z dx dy The rotation angle gis given by 20x 0x oy 14 x y denotes the centroid of the I x y z intensity distribution The ISO 11146 standard actually terms the quantities E x y z rather than I x y z and d x Z amp d y z rather than 2W z amp 2W z Here we have used the more familiar terminology rather than the less common terminology used in the ISO standard A 2 WinCamD Appendices For a pure Gaussian intensity distribution the second moment width is identical to the more familiar 1 e 13 5 of peak intensity width There are a number of potential disadvantages to the use of second moment as a beam diameter definition none of which are insurmountable in a well designed system a Unless the results are gathered and processed automatically the second moment diameter is non trivial to calculate It is not possible to simply measure it directly from a graphical plot of the data b Any unsubtracted background in the wings either purely analog noise or quantization noise due to inadequate dynamic range in the sensor or the ADC analog to digital converter leads to errors in the second moment In general it leads to an over estimation of the second moment width c If the I x y z intensity profile has wings which fall at a rate slower than 1 x or 1 y then the double integral actually increases as x and y increase For reasons b and c most commercial second
16. Screen to Clipboard Save current screen as bitmap file Q Save Ctri S Opens the j Export screen to Paint Save As dialog box for files S d Print Ctrl F ave current data saves the Se 7 i current on screen profile image Print w notes Ctl Print Setup SELECT data from data buffer as WCF opens a Beam Load defaults Select Dialog box that allows you to select which profiles to Load Job file save Click on an image to Save Job file deselect it at which point a cross appears on the image 1 Sample wef SAVE ALL data in data DEEN buffer as WCF saves all the CamD profiles in the buffer Be warned that a single 1024 x 1024 image gives a 2MB image Saving multiple images can lead to a very large file If you are going to email files SELECT dots tomdets bulerae Wee elsewhere consider collecting man 2 files over a smaller area or at a lower resolution and or SAVE ALL data in data butter as WILE zipping the files prior to sending them Other file formats Save current data as binary does precisely that Save curent data as binary Save current data as text Save current data as test Can be slow Can be slow saves a file in a text format These files may be W Use semicolon as line termination imported into programs such and semi colon as delimiters Save curent data as 16 bit TIFF non standard Save current data as 8 bit TIFF does precisely that See Data ayFormnats doc for inf
17. crisis call Technical Support 3 If you are sure that the equipment must be returned e g it is physically damaged or it was an evaluation item go to step 5 4 If it is not working but you are not sure why contact Technical Support We can frequently solve problems over the phone or identify the problem well enough to minimize turnaround time on returned equipment and or the number of items that need to be returned 5 Generate the paperwork Not providing the paperwork inevitably leads to delays WinCamD A 7 App Appendices a Contact support dataray com with a description of the reason for return to obtain an RMA number and a copy of the current RMA form also found at the website b Print it out the RMA form found at the website fill it out keep a copy for your records and include a good copy with the shipment c Mark the number on the RMA form the outside of the shipping box and on the packing list attached to the outside of the shipping box 6 Pack it properly 0 Where possible use the original packaging Q Always ensure that all boards and hardware with electrical connections is first wrapped in static dissipative foam pink or mauve or bag metallic silver gray Q If an improperly wrapped item is found to be zapped by static unlikely but possible then we must charge you for the replacement LY Include the cables 7 Return the equipment to the address on the RMA form Different products are
18. soggy floppy paper feeling 3 2 10 Average Opens the Image Averaging menu Macua Fiter Camera Choose either a running average based upon a specific l number Average 5 to 20 of profiles or choose Continuous o averaging accumulation averaging of the profiles An averaging mode indication will appear in blue on the profile graphic Average 5 The displayed results are derived from the averaged profile ear Average 20 Reset average ESC Press or p the Esc button on l the keyboard to restart the averaging Continuous 3 24 WinCamD Series Quick Start Tutorial 3 2 11 Filter Selects profile and or area smoothing For beams below 30 times the pixel dimension the Filter should be set to No filtering Filter selects a triangular weighting smoothing function performed as a running smooth of the profile The default is 0 2 filter Select Filter 0 X Full Scale The actual FWHM of the triangular filter may be calculated as FWHM of full scale x Scale um div x Zoom factor 10 3 2 Camera View Setup FWHM No Filtering Filter 0 1 Full Scale w Filter 0 2 Full Scale Samples Filter 0 5 Full Scale Filter 1 0 Full Scale E g for of full scale 0 2 Filter 2 0 Full Scale Scale um div 50 Filter 5 0 Full Scale Zoom factor 4 Filter 10 Full Scale FWHM 4 um WinCamD 1 X 1 no filter Since smoothing causes an increase in the width of WinCamD 2 X 2 pixels the smoothed profil
19. wizard to install the driver Do not let it go to the web to find a driver Allow it to install automatically Start the software The camera LED cycles Red Off Green Red Green If it stays Red when the software is on the port is not reporting itself as USB 2 0 In the pull down menu go Device WinCamD The software detects the camera type Remove the dust cap Press UCM series Does not apply to other cameras Go Alt S set PLS factor 0 9 Calibrate it per App c D of this manual TaperCamD series Go Alt S set Pixel multiply factors to rear label value Note The BNC on the camera is a trigger input output It is not an analog video output 2 1 UNPACK THE HARDWARE Please check your purchase Locate and identify all items ordered If any items appear damaged or missing or you have any other questions please contact us WinCamD Series 2 1 2 1 Installation Pictured WinCamD with StarTech 1 1 UV adaptor For pictures of the following see the website LU TaperCamD O TaperCamD20 15 Oh WinCamD with Cam IR Adaptor O WinCamD with x2 and x5 Beam Expanders l 4 a H Da E ABA 9 NTL SA HSS of Pesan ima Fey i Th E WinCamD with microscope adaptor and objective WinCamD with C mount lens WinCamD UCM CE USB 2 0 port on PC Notebook Tablet PC Hub Booster cable PCI card on PC Cardbus in Notebook series 3 m USB 2 0 Ca
20. 3 Select either External Pem mE Trigger Enabled Exposure settable b Isolated Pulse Triggering Trigger is Off For some users e g doing fusion experiments single Auto Trigger On Exposure setable pulse triggering on the first incident pulse is required For External Trigger Enabled Exposure setable these applications the trigger pulse must arrive At M Trigger on Positive Edge else negative 40 us to 20 ms before the laser pulse The exposure Trigger Output Enabled Trigger et to off must be set gt At In such cases with WinCamD Input Response Limits in percent use Direct Trigger Input no locking The camera will trigger on the single TTL input pulse and will also indicate on screen how many Cancel pulses have been received Set Trigger is input c Pulse Train Triggering Set up the dialog box in accordance with the trigger characteristics Source Repetition Frequency optional currently does nothing and maybe deleted in a future release d The BNC on the WinCamD head can be configured as an input or output socket The expected input pulse is a TTL pulse The pulse goes high in synchronization with the exposure signal start on the imager chip and the pulse width equals the exposure length Attach a 50 Q or 75 Q BNC cable to the BNC connector on the camera head In most scenarios the laser will provide the trigger to the camera The WinCamD BNC I O 4 6 WinCamD Series e f g
21. External Trigger Enabled Exposure setable Trigger on Positive Edge else negative Trigger Output Enabled Trigger set to off Input Response Limits in percent Cancel 4 3 Capturing Pulsed Lasers 4 3 AUTO TRIGGER MODE In Auto Trigger mode WinCamD will Trigger Control R Click to setup automatically capture and display pulses that 4 E lie within the intensity limits set by the user Auto Trigger is enabled Auto Trigger is attractive to many users of a WinCamD Series It works well in many circumstances Auto Trigger may require some trial and error experimentation to get consistent results It may require a level of knowledge of what is good data based upon a level of experience with the WinCamD and the laser being tested Even if your laser driver provides a TTL trigger output or accepts a trigger input try Auto Trigger before going to Section 4 4 a Auto trigger is totally ungated and untriggered with a simple upper and lower intensity level criteria to Accept or Reject images each time a frame is captured b Capture status messages are displayed in the box on the left hand side immediately below the button bar Auto Trigger Mode Operation a b c d e 4 4 As previously advised first r set up approximately in CW ilar mE IA ets atfy mode Press Ctrl T or right click on the non slider area of the Trigger is Off Trigger Control box to open the dialog
22. In the Setup pull down menu choose Capture setup dialog ALT S Set the Pixel multiply factors if it should not be 1 0 E g 2 25 for the TaperCamD See page 1 14 for values Click OK Right click on the 2D image and choose Force crosshairs to zero degrees amp Crosshairs user placed Place the crosshairs in the approximate center of the image not critical Remove the ND filter and attach a tube at least 100 mm long to the front of the camera Point the camera plus tube at an approximately Lambertian source E g a ceiling or a wall with a non glossy finish Press the Go button The illumination level must be such enough that the Exposure time lies between 1 000 ms and 50 00 ms In the Average pull down menu set Average 20 You may see an image something like that shown right There may some shading plus individual bad pixels or TaperCams small groups of bad pixels corresponding to the Clock source PCI Capture Resolution f FULL 4 65 4 65 microns f FAST 9 3 8 9 3 microns Capture Block camera pines fae f Efu 64 C 128 128 C256 x 256 O 384x 384 C 512x512 0 752x752 f 1024 1024 C 1200 1024 Custom nas e lanar App w High color palette E Monochrome palette 32 color palette 10 color palette Ink saver option Auto orient crosshairs Force Crosshairs to zero degrees Force Crosshairs to 45 degrees Don t Show Crosshairs Crosshairs snap to centroid default Crosshairs snap to g
23. Logs results data in real time to a file If it s not here it s zero called RTDATA txt example shown where it is available for U Wwincam gt _Ww eare ers cto U_wincamb_width_at_clip_ access by other software Wi 2880 0742 ee Z 2053 8683 By monitoring the Update_key Uniformity wincamD you can determine when updated data fewidth wincamp 32826 7456 is available for readout xc_wincamD 407 1197 cwincambd 913 1700 1 401 9454 904 4648 lt p_wincamb 388 6000 Tey ean 857 6000 Ellipticity_wincamD 0 9964 Majorwidth_wincamD 3793 6228 mMinorwidthwincamp 3780 0723 Meanwidth_wincamD 3803 1562 Peak wincamo 0 8462 The_end x T Image Log Logs up to 64 images at intervals WinCamD Image Log Dialog of 1 to 5 000 s An example is shown below Shatus In the future the number of File images will be increased and the interval will be reduced to as fast as_ possible Because this function fills up ear iog your hard drive at 2 1 MB per full resolution image the start log Hide dialog software will assess available Space and deliberately not fill it Ready WinCamD Image Log Setup LOG EVERY 30 SECONDS UNTIL 25 IMAGES ARE CAPTURED 50 Max Log File Hame Same as WinlamD save yct WinCamLog_1_2_03 wef browse 3 34 WinCamD Series Ea Beam Wander Use the button or press Ctrl W The display auto scales as points are added The number
24. Sin 9 A Ao i e 0 increases as A increases E g Consider a first order HBS designed for 1064 nm ss 1 0 10 Used at 800nm the values change to s 2 1 0 6 9 Standard HBSs are wedged by e g 30 arcmin perpendicular to the sampling angle plane in order to avoid interference effects Sources of diffractive sampling optics include Gentec www gentec eo ca Note that binary gratings are not holographic gratings and though less expensive may not perform as well in terms of ghost images etc 5 4 UV LASERS Various manufacturers make conversion screens that convert UV to visible Further information will be found at the website We sell StarTech UV beam imaging accessories oh ami 9 Gn WTS tas 6 FUL i T fi Th 5 6 WinCamD Series Laser Attenuation 5 5 WORKING WITH BEAMS LARGER THAN THE CAMERA This section assumes that you have already considered use of a TaperCamD a TaperCamD20 15 or a Beam Expander Unsure Contact support dataray com 5 5 1 Imaging of the laser beam scattered off a diffusing surface Incident e n OO eS gt A cgl Scattering from a Diffuse Scattering Focusing lens Surface WinCamD This has been found to be a very effective technique Not only is the beam image optically reduced to fit the CCD area but also the scattering reduces the beam intensity Q If a standard camera lens assembly with integral focusing and iris aperture is employed then focusing
25. WinCamD UCD23 WinCamD UCM WinCamD UHR amp WinCamD UHS are trademarks of DataRay Inc All rights reserved Windows XP and Vista are trademarks of Microsoft Corporation Pentium is a trademark of Intel Corporation LabVIEW and LabWindows are trademarks of National Instruments 1 12 WinCamD Series Installation CHAPTER TWO 2 INSTALLATION 2 1 UNPACK THE HARDWARE vcecececeveueueececaveveueueutesavaveueututetavaueututenunavas 2 1 2 2 MINIMUM COMPUTER REQUIREMENTS seceeceuceuceuseueuueuueuveuseuseuseueuunaueans 2 3 2 3 IN TATON a ma eo 2 3 2 3 1 Software Installation Instructions cece cece cece eens cence ee eeeeeeeeeeeeeaneenes 2 4 2 4 MOUNTING THE HEAD cccctesssacccnsisanteonesecaatacsrenndretcaas tusesennenedteaanenes 2 5 2 4 1 CONNECUNO the Hedd xicccccaxecsxecexavarexanneuncadeeecadedaceseuederscocessausowabe 2 5 2 5 SOFTWARE INTERFACING wsuccuvecusepadueveuccevwedacguseweedsennssedececweedtaaerwars 2 6 2 6 FIRMWARE UPGRADES cxneiusdandeiuuenteninnd aot eiueegcadeuenedeinuaeesaendaxenanenes 2 6 QuickStart in case you are one of those rare people who do not read manuals 1 5 Install the software and run it Check that your computer meets the Minimum PC Requirements on page 1 5 Install the software as Administrator Sec 2 4 Open it to load the driver In the Device pull down menu select WinCamD Close the software Install the driver Connect the camera head amp follow the New hardware found
26. a saturated image results If the beam overfills the active area inaccurate measurement of the beam will result Typical attenuation factors required between laser beam and camera are factors of 10 to 10 or more ND5 0 to gt ND10 0 WinCamD Series cameras feature as standard UO ND4 0 attenuating filter LDFP Low Distortion FacePlate set at 3 to the optical axis in order to avoid interference fringes See page 1 7 for ND4 0 transmission WinCamD Series 5 1 Laser Attenuation OW Electronic shutter giving effectively ND4 5 45 dB or 32 000 1 for CW beams Imager gain variation for Pulsed beams This makes achievement of the required levels of beam attenuation as simple as possible but it is still important to understand what the considerations are and how to address beam attenuation and large diameter beam measurement Ambient Background Attenuation Although the WinCamD software offers background subtraction for best dynamic range and SNR it is better to reduce the ambient background to black level on the camera Measurements under typical lab conditions require a reduction of the ambient level of around 10 000 The ND4 filter provided with WinCamD cameras provide suitable levels of ambient attenuation 5 1 IMPORTANT TERMS E E g 5 2 Irradiance Power Density For a Gaussian beam of 1 e 13 5 of peak intensity width of 2w cm and total beam power P Watts the peak Irradiance in W cm in t
27. accessories on its upper surface WinCamD Series 1 9 Introduction TaperCamD Series Outlines Tapers are fused coherent fiber bundles heated drawn round to rectangular and polished to give an output end the size of the imager chip The image is demagnified M lt 1 from the faceplate input to the imager end NA at the imager end is 1 0 NA at the input faceplate is a factor of M smaller Individual fibers at the input end are 6 um pitch with a 50 core cladding area ratio Refractive index is 1 81 leading to a front surface reflectivity of 8 3 These taper ends are bonded to the surface of the imager chip Empty filter holders are available for both TaperCam sizes A 0 25 deep extension ring is available with male and female 1 30 20 tpi threads 1 0 32 C mount thread ND4 at 3 13 0 mm 25 mm 20 0 mm TaperCamD UHR amp UHS PMF 1 6 TaperCamD UCM PMF 2 25 TaperCamD20 15 UHR and UHS PMF 3 1 TaperCamD20 15 UCM PMF 2 27 ND4 at 3 16 7 mm 1 30 20 tpi thread 1 0 32 C mount thread 1 10 WinCamD Series Introduction 1 6 BEAM LIMITS 1 6 1 6 1 Beam Measurement Region Approximate imager dimensions shown actual size See spec tables for exact sizes 6 5 C 4 8 12 CCD amp CMOS chips 8 8 we 2 3 CCD amp CMOS chips 14 TaperCamD 20 18 15 TaperCamD20 15 For accurate beam measurement the beam must lie totally within the area shown For t
28. be different 5 Centroid The Centroid Xc Yc of an image is the intensity weighted arithmetic mean position of all pixel intensities above the centroid clip level default value 13 5 It is the Center of Gravity of the beam As noise moves pixels above and below the centroid clip level and hence in or out of the centroid calculation the centroid value may change by an amount lower than the pixel size For large beams the quantization is barely visible For smaller beams it may become significant A 6 WinCamD Appendices APPENDIX C Support Returns Distributors Reps DataRay maintains a network of knowledgeable Distributors and Representatives and also offer direct product support Contact details vary with time and therefore have not been included here Visit the website for a complete listing Service Returns RMAs Repairs Equipment Problems Recalibration If you did not receive the product directly from DataRay contact the vendor directly If you did receive the product directly from DataRay see the current procedure for returning product for repair posted at the website under Returns Repairs in the Sales amp Support menu The simple steps below are designed to minimize the number of calls that you need to make minimize time to handle the issue minimize your costs and our costs and get you back to a working system as soon as possible Current support contacts are at the website Remember Q Ther
29. data is saved as log text files which may be exported into Microsoft Notepad using Show log file as text and into Microsoft Excel using Convert to Excel See examples below P Log1 log Notepad File Edit Format wiew Help DataRay Log File wersion 4 0 Started Thursday october 03 2002 at 13 30 Type wincamb Sample Time In Seconds u_winCamb_width_at_clip_l u_winCamb_width_at 3 4 1 2 0 3047 9908 1717 625 0 958 0 300 3098 378 1743 572 0 956 0 31 2 3 0 3059 283 1770 426 0 961 0 330 3074 842 1689 825 0 955 O27 3 4 0 3044 777 1738 533 0 958 0 315 3081 368 1743 729 0 955 0 31 A E 205656 ORO 1771 EER Mm GGR mM 2207F ary FGA 171A RAA Mm GGA 24 Ed Microsoft Excel logit xls El File Edit View Insert Format Tools Data Window Help Oeh sa elav ff Time In oi Sample AWua Dia 2Wub Dia GFit TopHat 2wa Dial 2vvvb Dial GFit TopHat Ac Ye z 1 3496 995 2016 962 0 952 0 5351 3746 061 2129 565 0 955 0 325 569 553 51 474 3 2 3491 67 1964 593 0 95 0 306 3740 473 2127 07T 0 953 0 33 569 674 51 203 A a Ta mae TT Te ee a mat aTa ee WT mma ane a oe ee a rye oT ra amna Graphing in Excel If you are unfamiliar with graphing in Excel please see the Graphing in Excel application note at the website which will take you through the basics WinCamD Series 3 33 Quick Start Tutorial E RIDATA TXT Notepad File Edit Format View Help Results log to Text File intatedkeye 50
30. is simple and the beam intensity can be further attenuated by closing the iris O If the incident and scattered angle employed are small and similar the cosine distortion of the beam on the diffuser is compensated with the camera and lens aligned as shown orthogonal to the axis of the scattered light O A perfect diffuser backscatters 31 8 per sr sr steradian of solid angle For beams up to 24 mm total diameter the Melles Griot SpeckleEater is a rotating diffuser that employs a rotating diffusing disk to eliminate speckle for CW beams O A 10mm lens aperture at 100mm distance samples 7 86 10 sr and therefore would pick up 0 25 1 400 of the beam reflected off a perfect diffuser More generally if the beam image on the diffuser is focused through a lens iris aperture diameter D at distance L from the diffuser where DLL then the effective Collection Factor may be calculated as 0 25 D L On top of this must be added the increase in irradiance of 1 m due to lens magnification m m is lt 1 Hence the total effective beam attenuation factor is 0 25 D mL Since m f L the factor becomes 0 25 D f 0 25 1 Lens f number 5 5 2 Use of a long focal length mirror Use a long focal length spherical concave mirror worked slightly off axis to reduce the beam diameter to a size which will fit on the camera Sample the beam along its converging path at a point where it is small enough for th
31. levels is due to the low resolution of the program Values between 1100 and 1550 nm are based on two points measured at 1310 and 1550nm using an InGaAs detector beamprofiler ND Neutral Density is specified traditionally at the 546 1 nm Hg line However whilst the visible region is flat the transmission increases dramatically below 400 nm and increases dramatically above 600 nm See and use the graphs above If T is the internal transmission neglecting surface reflection losses then ND logiol e g at T 1 0 01 ND 2 0 ND is sometimes referred to as OD or Optical Density ND is more correct for these filters since they have a relatively flat response with wavelength compared with the more peaked response of a typical OD filters Internal transmission values are correct to an estimated 5 Front and back surface reflections lose another 8 on the values graphed The 1310 versions of the cameras come with a long pass IR filter which has lt 0 5 transmission at lt 1280 nm 5 transmission at 1288 nm 50 transmission at 1291 nm gt 75 transmission from 1295 nm to gt 1600nm 1 8 WinCamD Series Introduction A Complete WinCamD UXXX system comprises Camera ND 4 0 filter Software 3 m 10 ft Cable User Manual 1 6 The Part Number on the rear label derives from the descriptions and in the table below Part Number Camera type CMOS chip Suffix if required WinCamD UCD12 UV TaperCamD UCD23 1310 Ta
32. moment beam diameter software first automatically determines and subtracts the background and then truncates I x y z to the zeroed background level at a predetermined distance from the 1 e diameter Some software allows the user to override this distance 4 Acknowledgements Parts of this Application Note draw on Reference 2 and we have used the same notation wherever possible 5 References 1 ISO 11146 Optics and optical instruments Lasers and laser related equipment Test methods for Beam widths divergence angle and beam propagation factor Published by the International Organization for Standardization Available from your national standards organization www ansi org in the US 2 T F Johnston Jr Beam propagation M measurement made as easy as it gets the four cuts method Applied Optics Vol 37 No 21 20 July 1998 pp 4840 4850 WinCamD A 3 App Appendices Appendix B Accuracy Precision amp Resolution At Issue Customers and Reps Distributors ponder and sometimes ask the following apparently reasonable questions i What is the beam measurement accuracy error of WinCamD Series ii How can you justify listing accuracy values smaller than the pixel size iii How does the accuracy depend on the beam size They may feel frustration when the answers are not always totally clear cut and unambiguous Why the uncertainty Why is every answer qualified by depending of course on th
33. on any result area of the screen to open a Pass Fail parameters dialog box You may set an Upper Limit and a Lower Limit for the particular parameter Check the Enable Test box to enable the test This is also the box to be checked for Log enabled data only See Log Data in Section 3 4 When the test is enabled the numbers will be displayed on screen in the chosen Pass Fail colors The default colors are Green for Pass and Red for Fail Right click on a result to change these colors See 3 2 5 below Check the Lock w Password box to lock the criteria The box below appears Remember the Password It you change it it cannot be retrieved Quick Start Tutorial Pass Fail parameters fx Parameter Majorwidth winCamD Upper Limit 3 2 i OOO000 0 urn Lower Limit OOOO00 0 um Enabletest Lock wy password Cancel If you put in the wrong password the box Password shown right will appear At the time of writing Enter new password p Confirm password Cancel WinCamD Series the master password is case If at some later time this does not work contact Technical Support 1 peanuts all lower Call for master password E Wrong password 3 13 Quick Start Tutorial E 3 14 Right click on any result area of the screen to open Custom button colors select dialog box Unless you have good reason or good color sense it is suggested tha
34. setups It is especially useful when testing a variety of laser assemblies on a regular basis Saving a complex setup with specific Pass Fail criteria is a very effective way of saving time and establishing parameters for repeatable results Multiple ojf files can be saved each with a different set of settings Q The next block shows the names and paths of the six most recent files that have been saved and or opened Where no file path is shown then the file is in the c Program Files DataRay directory where you originally installed the software Q Exit does precisely that 3 2 8 Device Q Select the hardware that you are working with Palettes Average F O WinCamD will change to WinCamD Series in a future release Beamscope P 7 BeamScope 2D Scan BeamMap Classic BeamMap C BeamMap Collimate Beam R y VWinCamD WinCamD DualCam WinCamD Series 3 23 Quick Start Tutorial 3 2 9 Palettes Select the palette that you require tia Average Filter w High color palette Monochrome palette Monochrome palette is whatever your PC supports 32 color palette High color palette is whatever your PC supports LI 32 color palette is precisely that 10 color palette Q 10 color palette is precisely that a U Ink Saver mode changes the black and blue black background the lowest 2 of the levels after background subtraction to a white background This does what it says It saves ink when you print and minimizes that
35. ssscsssssserrsresn 3 43 3 6 4 TaperGalmD Artilacts eiiie eerie eee ee 3 44 WinCamD Series 3 1 Quick Start Tutorial Do not just read this User Manual Do sit at the computer and try out the software OQ Unfamiliar with the hardware or just evaluating the software Start at Section 3 1 LY Familiar with the software but never used the hardware Go to Section 3 6 3 1 MAIN SCREEN 3 1 1 Start the Software Double click the icon to start the software See Chap 2 if software is not yet installed In the pull down menu under Device select WinCamD WinCamD main screen shown below appears The software automatically detects the camera type The screen appearance will change slightly depending upon you screen resolution The required minimum is 1024 x 768 H x V t SG Xg Xp Xu F 1 8 A Y EIS SBgwrna HB i 4xSigmaf a Clip b 2W_Major 0 0 um 2W_Minor 0 0 um 2W_Mean 0 0 um Eff diam 0 0 um Ellipticity 0 00 Orientation 0 0 deg Relative Power 0 00 Full Range 2 Crosshair 16 5 deg ee aT 0 0 um i Imager Gain 1 0 on Exposure time 200 0 ms Auto ln a gt 2Wva 4Sigma 2Wvb 50 0 swe eee we eee ee a on a in on en oe Oe rt pt tt Trigger Button slide to desired setting right click to open dialog 3 2 WinCamD Series Quick Start Tutorial 3 1 2 Examine Previously Saved Data Click on this button or enter Alt F O
36. support by phone or email For those who decide not to bother to read the manual before calling for support a Help line charged at a per minute rate is available seriously though read this manual to enjoy the full benefit of your investment Other Issues E m E WinCamD UXXX Windows not DataRay software requires that the WinCamD UXX driver be installed separately for each newly used USB 2 0 port UCM at Short Exposures Short exposures have some limitations Download and read the important Application Note with this name at the website UCDXX Comet Tail At short exposures a vertical comet tail may appear for image sizes of 1024 x 1024 and higher and a detached tail for 752 x 752 At 512 x 512 and below the tail virtually disappears This is an unavoidable feature of high resolution CCD chips Incident light leaks through the metal over the Transfer Register The effect is worse at longer wavelengths and for beams incident at other than normal incidence To minimize the tail 1 Use exposure times gt few ms wherever possible 2 Ensure that the light is incident at 90 wherever possible 3 Set up a Capture Block appropriate to the size of your beam 4 Use Inclusion region settings to exclude the tail region from the calculation 5 Rotate the crosshairs from 0 to move the measured profile off the tail WinCamD IR supplements are posted to Application Notes at the website
37. the chip affects the measured image and the accuracy Dimensional accuracy of TaperCamD s is limited by the Schott specified 3 pincushion or barrel distortion of the fiber optic tapers primarily found towards the outside edges 1 5 WINCAMD SERIES PRODUCT SPECIFICATIONS Specifications apply to all cameras in the series unless otherwise noted and are subject to change without notice WinCamD UCD12 UCD23 UCM UHR UHS 1 2 CCD 2 3 CCD 2 3 CMOS CMOS High Speed Pixel Count amp 1 4 M Pixel 1 4 M Pixel 1 3 MPixel 1 3 MPixel 355 kPixel Hx V 1360 x1024 1360 x1024 1260 x 1024 1280 x 1024 656 x 496 Sensor image area 6 3 x 4 8 mm 8 8 x 6 6 mm 8 6 x 6 9 mm 6 6 x 5 3 mm 6 5 x 4 9 um Pixel dimension 4 65 x 4 65 um 6 45 x 6 45 um 6 7 x 6 7 um 5 2 x 5 2 um 9 9x9 9 um Min beam 10 pixels 47 um 65 um 67 um 52 um 100 um Shutter type Synchronous Synchronous Synchronous Rolling Synchronous Max full frame rate 10 Hz 10 Hz 10 Hz 10 Hz 10 Hz Max every pulse PRR 10 Hz 10 Hz 10 Hz 10 Hz 10 Hz Single pulse capture PRR 20 kHz 20 kHz 300 Hz 20 kHz 20 kHz Signal to RMS Noise 1 000 1 1 000 1 500 1 1 000 1 800 1 Opt Elec dB Dynamic Range 30 60 dB 30 60 dB 27 54 dB 30 60 dB 29 58 dB Electronic Shutter 43 dB 43 dB 43 dB 43 dB 43 dB ND SNR 113 dB 113 dB 110 dB 113 dB 112 dB 2 1011 1 2 10 1 101 1 2 101 1 1 6 1017 1 TaperCamD pixel 10 5 x 10 5 um 10 5
38. x 10 5 um 11x11 um 12 x 12 um 22 x 22 um TaperCamD20 15 pixel 14 5 x 14 5 um 14 5 x 14 5 um 15x15 um 16 x 16 um 31 x 31 um ADC 14 bit 14 bit 10 bit 10 bit 10 bit 16 384 levels 16 384 levels 1024 levels 1024 levels 1024 levels OK we agree that quoting electrical dB for optical SNR is a nonsense but some suppliers do this so we offer a comparable specification OK we agree that Dynamic Range that includes removable ND filters is also nonsense but some suppliers do this so we offer comparable specification with ND 4 ITEM Measurable Sources Measured Beam Powers Wavelength Ranges SPECIFICATION CW beams Pulsed sources Isolated pulse I to 20 kHz single pulse isolation 5 kHz for WinCamD UCM at Short Exposures See Ap Note Software configurable Auto trigger Synchronous amp Variable Delay See the Saturation Power Graph and Notes below Standard camera 350 to 1150 nm 1310 350 to 1350 nm Residual silicon response WinCamD Series 1 3 1 4 1 5 Introduction IR 1480 to 1680 nm IR Phosphor 10 non uniformity 40 um FWHM Cam IR Adaptor 1480 to 1680 nm IR Phosphor 10 non uniformity 180 um FWHM UV UV converters for 4 lt 350 nm from StarTech Instruments are Electronic Dynamic Range CW Pulsed Manual Beam Attenuation Accessories Displayed Profiles Measured amp Displayed Profile Parameters Beam Diameter Beam Fits Beam Ellipticity Centroid Pos
39. you are still unsuccessful contact Technical Support 2 5 SOFTWARE INTERFACING For interfacing to LabVIEW Visual Basic Visual C etc we do provide the source code and applicable Application Notes are at the website Contact Technical Support as necessary 2 6 FIRMWARE UPGRADES UO What is Firmware Firmware is software code that resides in the hardware rather than running on the PC Upgrades may be required to improve performance add features and or to correct a bug UO How frequent are upgrades Firmware upgrades may happen during the year following introduction of a new product or a major upgrade Subsequently they are rare events How do I know if an upgrade is available We contact you 2 6 WinCamD Series Quick Start Tutorial CHAPTER THREE 3 QUICK START TUTORIALS 3t MAIN SGREEN satis stow ade rene a E a a E 3 2 3 121 Stare CHE SORWa Cais versa vacances A ENANA ENNA NAE ETN EASE NATERA 3 2 3 1 2 Examine Previously Saved Data ss ssrsssrrrrsrrrrrsrrrrsrrrrerrreerrreerrn 3 3 3 1 3 Mali Screen TOD aee aa E A a E a ta ene 3 4 3 1 4 Main Screen Left Hand Side c necccecrienie i A A teas EA 3 5 3sls5 Main Screen Prone Display suicelesvenselvertenvderelevelveelcxcbeuelveuteeylerelgeuyees 3 6 3 1 6 M n Screen Bottom WIMG icaarasaenrecain on niwaerareeenreterninneeniaeconenieeniaa ees 3 7 S437 Main Screen 2D and 3D Display Area ccccccceee cece eeeeeeeeeeeeaeeeeeeaeas 3 7 3 2 MANIPULATE THE IM
40. AGE AND PROFILE ANALYSIS 0csseeeeeeeeeeeeeeeeeeeeeanaes 3 9 3 2 1 SD Display amp Manipulation on out ya lvava rela vale tava elvan EE EEDA 3 9 3 2 2 Choose a Beam Width Definition cccccccccee eee eeeeeeeeeseeeeeeeeeeuees 3 10 32 3 Set Diameter Display MOde cccccccceeeeeseeeeeeesseeeeeeesseeeeeeeesunees 3 12 3 2 4 SEER F ecm ene ne ane TNTCR PTT Ce RCD Oe Eee TE aM Nore aT 3 13 3 2 5 Change Promile DIiSplay siierccere tsps cies snn T T TT T TE 3 15 3 2 6 PUI SGOWN Menus nirna G S 3 21 3 2 7 iGo cu eueGeOr ca aehed edad edited A nde tn dee dooce EE EEN 3 22 3 2 8 DEVICE ucor exiennenaen aici itintt do E A AE 3 23 3 2 9 Pale ES S255 i asaafa tliat vie ce ikea spn nore aes phe RAI IA Ae ES ae 3 24 S20 vAV CAG En E A taal tate taal A tant aaa lta ta tealaaadaane 3 24 LNE FEC eritir te lel Ooh EKEN EREN oe ee Ol bene EE ced 3 25 3 2 12 RIVE oana esata telethon atc ese tos sate ons an onions A 3 26 LL NIEWE E sa mieetemasereucan samen 3 26 Seo ETOP wrt ancuneres a acum ancke cdi usacienartaa EE 3 27 3 4 TOOL BARic sere tanissnetarsesecceiieswsseniairacisesqananieseneareuetaras tees 3 30 3 0 SHORT CUTS winteiuiaa rename sace nesta A en uae eee Tl 3 40 3 6 HARDWARE QUICK START TUTORIAL ssssssasusensnsunnnnsnsnnnnannsssnnnannnnenns 3 41 3 6 1 Precautions and Safety Warnings sssssssssrrssrrrresrrresrrrrsrrrrerrreene 3 41 3 6 2 SCAT UA e E T 3 41 3 6 3 Artifacts and Cleaning of the ND filter amp Imager Chip
41. ARGER THAN THE CAMERA v cceceeueueeuveuseuveuseutaues 5 7 5 5 1 Imaging of the laser beam scattered off a diffusing surface 5 7 5 5 2 Use of a long focal length Mirror ccccecee cece eee eeeeeeeeeeeseneeeeeeaas 5 7 5 5 3 Use of a long focal length IeNns ccccccecee eee eee sees eeeeeeeeeeeseaneeeeeaas 5 8 It is very important to understand this section This chapter addresses appropriate attenuation beam sampling techniques and the measurement of large diameter beams Catalog Optics companies can supply suitable instruments optics and optical mounting hardware to meet most measurement attenuation and beam sampling requirements outlined here Links to Accessories are at the website The notes in this chapter are provided for guidance only DataRay Inc and its Distributors and Representatives accept no liability for errors or omissions in these notes Where a recommendation not covered by this chapter is required please fax or email a description of your problem together with a diagram and full laser beam details Cameras are designed to be sensitive to low light levels Lasers are high intensity sources If the beam Irradiance W cm or J cm exceeds the Damage Threshold Minimum signal unit area which causes damage of the camera irreparable damage may result If the laser beam Irradiance W cm or J cm exceeds the Saturation I rradiance Saturation signal unit area of the camera
42. B J o a xX 3 k Me 100 Minimum Maximum Measured am S Diameter mm Ra am D Clip level Beam Diam Specs Beam Diameter Results ClipLevel Target Min Max Mean X Y Sm mm mm _ mm mm m m 135 500 480 520 504 5030 5044 20 450o 430 470 443 4454 4398 30 3 20 305 330 SS Ee 50 70 100 095 105 104 996 1084 o oso oss oss oso ae sti Entry Format Serial Number o O 7 Jan 03 mm dd A O 20 30 40 3 ee 60 235 225 245 233 2338 2315 u i 80 90 fe 00 03 09 00 09 09 09 00 09 00 BONO NO NSN ROR ho ho ho ed J win lo 00 wN 0ml l l ho 00 OO MO alela na a WinCamD Series Quick Start Tutorial Q Set profile colors allows precisely that You can waste infinite amounts of time playing with this O Other profile manipulation features Center profile In order to center the profile in the profile area in which the cursor lies press c for Center on the keyboard Pan profile In order to pan the profile in the profile area in which the cursor lies press P for Pan on the keyboard and the current cursor position in the profile box will be centered in the window E g place the cursor to the left of the profile and when you press p the profile will move right Pan image In order to center a part of the imag
43. E oss c0seedtanuaontaaseananse ce on a on iawe roe a nn dian E EE 1 1 1 2 SABOUTWINCAMD SERIES sixsiescegaeaecadenceweres SedeaG pee temeceneadse Plaxtawentaes 1 1 1 3 SYSTEM CONFIGURATION amp DESCRIPTION ccecceeceueeueuueuueuveuteuseuteusautanes 1 2 1 4 CALIBRATION asc aora soa nada dameuetaacamene once gedeuoeeaaa aT 1 3 1 5 WINCAMD SERIES PRODUCT SPECIFICATIONS vcecceueuueuveuveuteuveueeuseueautanes 1 3 1 6 BEAM IIMS naeng r ale as a aciasct nar ease cients amp satan mon nai E 1 11 1 6 1 Beam Measurement Region cc cece eeeeeeeeeeeeeeeeeeeesseeeeeeeeesnnneees 1 11 1 6 2 BeanWiPOWeR IIMVITS 24a fia eek caw aren nee eaeh eee a nue cG aa ee eae oubneaehacahana 1 11 1 7 MANUAL CONVENTIONS sorrenca na e trewe eeu tar vues oa peeaneaae a 1 12 1 8 MANUAL AND COPYRIGHT NOTICE ccceececceucccceueuueuueueeuveuteuteuteusuunanes 1 12 1 1 WELCOME Welcome to beam imaging These innovative products define state of the art feature rich real time camera based beam imaging in accordance with the ISO 11146 Standard They are Research Development QA and Manufacturing test tools combining easy to use intuitive software with proven beam profiling algorithms With a little time and patience we think you will be pleasantly surprised with how easy to use we have made it This manual covers all WinCamD XXX Series products of which TapercamD UXXX and TaperCamD20 15 UXXX series are a part We welcome requests for custom hardware configu
44. E saiewsecacshoesataroneseaserea a a ed os A AA 4 6 WinCamD Series makes pulsed beam capture as simple as possible That said learn to operate the software with a simple CW beam before you try to operate with a pulsed beam Trust us on this your time will be well spent WinCamD Series 0 has comprehensive Auto Trigger capability and a input output trigger via BNC Q can synchronize to a 1 0 to 12V amplitude preferably TTL input pulse There is 200 ns delay between a trigger pulse and the shutter opening 0 can output a 5 V TTL sync pulse to trigger a laser 0 can advance delay the electronic shutter with respect to the input output trigger 0 can dissect pulse widths gt 40 us and do so with synchronous triggering The pulse may be dissected by using an exposure time less than the pulse width and temporally scanning it across the pulsewidth Q can vary the shutter exposure time from 50 us to 1024 ms allowing beam attenuation on pulsed beams with pulse widths greater than 40 us LI can vary the CCD gain up to 5 1 7 14 dB optical electrical Use of gains gt 1 lead to lower SNR Signal to Noise Ratio 4 1 TERMS AND FEATURES Synchronous Camera Trigger The camera is triggered by a TTL pulse from the laser Synchronous Laser Trigger The laser is triggered by a pulse from the camera Exposure Electronic Shutter The light falling on the array leads to a proportional integrated si
45. Fie Acton View Help see t Rea LUDACRIS SPEED H Y Computer E8 DataRay Beam Profilers BM BeamMap Beam R BeamMap C and BeamScopeP Profilers Hg DataRay WinCamD Camera pa DataRay Inc USB2 0 devices ag DataRay gt WinCamUCM USB2 0 v1 VID 1632 PID 1001 WinCamD Series If you need to install it manually Installation in c Program Files DataRay locate DataRayUsb inf Right click the appropriate file and click Install Cannot find inf files in Windows Explorer To find inf files in Windows Explorer you may need to change the default settings In Windows Explorer from the View pull down menu select Details Then from the Tools menu select Folder Options Choose the View tab Change the items shown to the settings shown 2 4 MOUNTING THE HEAD c Hidden files and folders O Do not show hidden files and folders Show hidden files and folders C Hide extensions for known file types C Hide protected operating system files Reece 1 It is recommended that you mount the head before you connect it Sec 1 6 UXXX compact case cameras have integral 4 20 mounting holes in line with the sensor 2 Since the sensitive area is only mm in dimension ensure that either the head or the source assembly can be adjust in x y and as necessary zZ 3 Remove the thin screw on or push on cap from the front of the ND filter holder Do not unscrew the ND filter 2 4 1 Connecting the Head 1 With WinCamD S
46. Serial Number Purchased by Date Rev 0705A 2007 DataRay Inc All rights reserved DataRay Inc 605 Stapp Road Boulder Creek California 95006 USA www dataray com Product Support 1 866 WinCamD 1 866 946 2263 x702 From outside USA 303 543 8235 e support dataray com This page deliberately left blank Table of Contents 1 INTRODUC TIO Wi xceeeicdck fade ttietoaxdet bcdwatnctewekeeie cena ints OA 1 1 1 1 VVEECOME surdina aE caleeneaso cars ciaratonn ant iba ues aba Mestad aa aoutied A EEE 1 1 1 2 ABOUT WINCAMD SERIES ccceccececeececeuceceusuceueusausueeusueautusaususaununas 1 1 1 3 SYSTEM CONFIGURATION amp DESCRIPTION ccceececeececeuseueucuveusaveusuveneavenes 1 2 1 4 CALIBRATION assert asssta terse racer we he crate cemeteries shane gar narod era era ena seca inne aon 1 3 1 5 WINCAMD SERIES PRODUCT SPECIFICATIONS cccececceceuceceueuceueevaueutaueueas 1 3 1 6 BEAM LIMIT Orar a pean a Reales a wated a deanaserine eae dutie aw ae Gout aaraor 1 11 1 6 1 Beam Measurement Region cccccceeceecee eee eeeeeeeeeeesseeeeeeeeeeeanneees 1 11 1 6 2 Beal POWER LINT ces tede cocoa ee ee eee 1 11 1 7 MANUAL CONVENTIONS oaea aa aAA EET A 1 12 1 8 MANUAL AND COPYRIGHT NOTICE sssssssssnsnnrrnnsnnnrnrnrnnrnrnnerenrsrrrenas 1 12 INSTALLATION ci aa Gs clei Ate NA 2 1 2 1 UNPACK THE HARDWARE raa a O E a a cares 2 1 2 2 MINIMUM COMPUTER REQUIREMENTS seceeceuceuceucuueuueuueuveueeuseuseusaunaueans 2 3 2 3 INSTALLATION
47. Software bugs We attempt to deliver bug free software but just like operating system providers we find it hard to be perfect It is impossible to test all possible permutations and combinations of beam size capture block processing option etc Some error messages are warnings only some require the software to be restarted Press Alt PrtSc to put the message to the clipboard Then press OK and see whether you can continue to use the software Ctrl V will paste the message into an email If you find a problem please note the details wherever possible capture a relevant wef image file and email the file and the details of the PC and operating system to support dataray com We will attempt to resolve the issue as soon as possible Additional Information At the website you can find the following Application Notes WinCamD with Beam Expanders WinCamD with Lenses WinCamD Measurement of 337 nm N2 lasers WinCamD with Microscope Objectives WinCamD Signal to Noise Ratio WinCamD Series Sensor Replacement WinCamD use with Beam Expanders Gaussian Beam Divergence Measurement Zipped Word doc Excel spreadsheet USB 2 0 Products Software amp Hardware Compatibility Interfacing to DataRay Software WinCamD M2DU Stage Datasheet Most recent version WinCamD M2DU Stage User Guide Multiple Camera User Guide Measuring Large Beams with WinCamD WinCamD M2DU Stage User Guide WinCamD UXXX Series Laser Beam Imagers User Manual
48. allows you to select an image beam from the stored set Move the cursor over the array to view a beam The left right keyboard arrows Bem oE allow you to scroll through the beams without first opening the dialog The caption line at the top tells you which beam you are looking at Page Up Page Down has the same effect o Live versus Saved These buttons allow you to toggle between live mode and saved data Reset Averaging This button clears and restarts the averaging T the screen or the screen with additional notes In either case the header includes the software version number and the day and date of printing The file name will be added to this default header in the near future E Print amp Print with Notes This pair of buttons allows you to print just WinCamD Series 3 31 3 4 Quick Start Tutorial M2 This button accesses the M measured feature used in conjunction with the M2DU stage This is described in a separate Data Sheet and User Guide available at the website Wavelength 632 nm Cliplevel uv 4Sigma Waist Astigm Total span 21 9 mm Waist Assymetry Current Z location 9 9mm__ Div Asymmetry Log Data opens the Data Logging Control amp Status Data Logging Control amp Status dialog box This allows you to log data to the hard drive save the results as a log file export the results as text or to Excel and recall Ready the results as required Setup Log Show
49. ar 3 30 Clipboard 2D 3D Profile Screen dump to 3 23 Clip Level 3 10 Clock source 3 27 Colors 3 14 3 24 Computer Minimum Requirements 2 3 Compensation Files App E Configuration system 1 2 Crosshair 3 4 3 30 D Damage Threshold 1 11 Data Buffer 3 31 Examine Previously Saved 3 3 Log 3 32 Save to File Select 3 22 3 30 Defaults Load 3 23 Deviation Max amp Std 3 17 Device Selection 3 2 3 23 Diameter Display mode 3 10 Diffractive Beam Sampler 5 5 Diffusing Surface 5 6 Dimensions 1 3 1 5 Display Modes 3 10 Distance 3 20 Distributors A 7 Divergence angular 3 11 E EAM 2 5 4 Ellipticity 3 5 Electronic shutter 3 41 4 1 4 5 Exposure control 3 39 for pulsed lasers 4 4 Eye Safety 3 41 Fast mode 3 28 File Auto name 3 29 Open Save 3 22 3 30 Filter profile smoothing 3 26 Firmware upgrade 2 6 Flip image 3 27 WinCamD Fluence 3 36 Frame Rate 1 3 Full mode 3 28 Functional Description 1 3 G G Go 3 30 Gain CCD CMOS 3 39 Gamma correction 3 28 Gaussian Angular Divergence 3 11 Beam Definition A 1 Fit 3 17 gif files 3 23 Global Selection 3 15 Grids 3 16 H Hardware Mounting 1 5 2 5 Pull down Menu 3 21 Quick Start Tutorial 3 41 HBS 5 5 Help Tech Support A 7 Holographic Beam Sampler 5 5 I Image Artifacts 3 43 Average Filter 3 25 Inclusion Region 3 8 4 3 Ink Saver 3 31 Installation 2 1 Driver 2 4 Sof
50. are reasonably familiar with Windows Start your PC You can avoid potential but unlikely installation problems by turning off programs running in the background e g Anti virus software Instant Messenger automatic fax reception etc That said to date such programs have given us no problems Insert the the CD in the drive It should AutoRun If it does not go Start Run Browse to d idataray exe and press Open and then OK The install program will allow you the Advanced Options of changing the drive and directory location of the software The default is c Program Files DataRay In Windows Explorer from c Downloads or whichever temporary directory you put the software in double click idataray exe to install the software Install the Driver as follows Open the software In the Device pull down menu select WinCamD close the software This installs the driver Connect the camera Plug the UXXX camera into a USB 2 0 port Follow through the New Hardware found procedure but do not allow Windows to search on the web If necessary direct it to look in c Program Files DataRay If the card does not link properly then at the desktop right click on My Computer select Properties Device Manager click on the sign next to DataRay Inc USB2 0 Devices and double click DataRay WinCamD UCM Select Drivers and then click on Update Drivers to get to the Update Device Driver Wizard again Device Manager E mE
51. ata whether or not the camera is installed You must install the software as Administrator User with Administrator Rights is not enough Windows requires that hardware drivers be installed by an Administrator If you cannot even install the software it may be that your Administrator i e the actual IT person has restricted your software installation rights and must therefore be called in to install the software Software upgrades are free for the life of the product The absolutely latest software is not necessarily the version that arrived with the hardware Always visit Sales amp Support Software Upgrades at the website in order to determine whether a more recent version is available for download Check the version and the date If you do not already have it download the latest version of 1DataRay exe from the website and place it in a temporary directory named e g c Downloads Q In case you need to return to an older version of the software rename any old Dataray directory as c Program Files DataRayxyyz where x yyz is the version number found on the top line of the opened program E g c Program Files DataRay500S8 for Version 5 00S8 WinCamD Series 2 3 2 2 Installation 2 3 1 Software Installation Instructions These instructions assume that 1 2 3 4 2 4 You are running Windows XP or Vista and using a PC that meets the minimum requirements listed in Section 2 3 of this manual You
52. ater rate than the captured image count In addition if there is a difference between the numbers the Ready button will also frequently display the message Waiting For processing speed reasons the update priority on the Ready button is not as high as some other areas of the screen When no image is captured there is more time available for the button to be updated so the message tends to stay at Waiting Capture but too low If this message appears in the Ready area it is telling you that a frame was taken but the peak level was below the set Minimum level in percent Capture but too high If this message appears in the Ready area it is telling you that a frame was taken but the peak level was above the set Maximum level in percent Waiting Is not receiving a trigger pulse Advance or delay the Trigger Trigger Control R Click to setup Control slider to change the al i timing of the capture in 4uto Trigger is enabled relation to the trigger pulse until the whole pulse is captured 4 4 Capturing Pulsed Lasers WinCamD Series Laser Attenuation CHAPTER FIVE 5 LASER ATTENUATION 5 1 IMPORTANT TERMS ouse a a E a a A a a EE 5 2 5 2 ATTENUATION OF YOUR BEAM sssssassnnnnnnnnnnnnunnnnnnnnnnnnnnnnnnnunnnnnrnnnnne 5 3 5 3 ADDITIONAL BEAM SAMPLING ATTENUATION cecceeceecceuueuueeueeuueeuseuueeuvens 5 3 5 4 IM TEASER S Sanare oa oui Sauget aap hich a eana eara hak eee eaa 5 6 5 5 WORKING WITH BEAMS L
53. ble USB Mini B5 to USB A Up to 5m available Longer with WinCamD UXXX Configuration Standard 500 mA port required 2 9 WinCamD Series Installation 2 2 MINIMUM COMPUTER REQUIREMENTS O WARNING PC s with an unusual BIOS particularly so called Industrial PCs may be difficult to configure to work with the hardware Stick with good name brand PCs wherever possible Q Windows 2000 or XP Only Windows XP is fully supported Bugs which are only observed under the Windows 2000 operating system will no longer be fixed It may work under 98SE or Me but if you have problems these are no longer supported WinCambD is not currently available in a Mac compatible version Call in late 2005 0 A 1 GHz Processor faster The software uses floating point calculations therefore a processor with integral numeric coprocessor is required O gt 1024 x 768 display with 256 colors Q WinCamD UXXX USB 2 0 port with 500 mA capability the standard except on unpowered hubs O A Microsoft compatible pointing device E gt 512 MB of RAM A hard drive with 10 MB or more available space Q A CD R drive 2 3 INSTALLATION Most installation problems are caused by not carefully following the instructions Hardware installation is never as simple as software only installation If you want to save time read and follow the instructions IMPORTANT INSTALL THE SOFTWARE BEFORE THE HARDWARE The software can be used to view d
54. box shown f Auto Trigger On Exposure setable and select Auto Trigger On Exposure settable Unless you have a reason to select otherwise start with the defaults of 10 and 100 for the Minimum amp Maximum level in percent respectively The is expressed as a proportion of the saturation level of the ADC as shown on the screeen Beams with intensity above 100 will also be captured Setting to any value below 100 e g 99 excludes such beams The Minimum may not be set below 10 Pulse Repetition Rate dependencies PRR lt 25 kHz Choose Exposure settable mode below PRR 225 kHz Treat as a CW beam and ignore pulsed laser operation The number of pulses captured per exposure Exposure period x PRR Constant Exposure mode on WinCamD only To be renamed Open Shutter mode In this setting the shutter is open continuously The camera will repeatedly capture images as fast as the software the PC and the Capture Block setting will allow As soon as one frame has been processed and displayed the next image is read out As requested by the software the accumulated image is moved to the interline transfer register for readout WinCamD Series f g Capturing Pulsed Lasers Pulses with an ADC within the set levels will be captured and displayed Pulses which do not meet the criteria will not be displayed The Exposure time depends upon the number of lines in the chosen image size and whether Full or Fast mode has been sele
55. can fluctuate to a greater or lesser extent as one or more pulses fully or partially overlaps the exposure period and one or more pulses gets included To restrict the captured images to unsaturated images of reasonable intensity set the Maximum level in percent to 90 and increase the Minimum level in percent Then adjust the external attenuators and or the CCD gain until pulses are being captured A narrow ratio between the Maximum and Minimum levels ensures that only single pulses will be captured Important If you use an Exposure below the laser pulsewidth And the pulse spatial distribution changes during the pulse Then a single pulse image will not fully represent the pulse Instead use External Trigger mode below WinCamD Series 4 5 4 3 Capturing Pulsed Lasers h Capture but too low If this message appears in the Ready area it is telling you that a frame was taken but the peak level was below the set Minimum level in percent Capture but too high If this message appears in the Ready area it is telling you that a frame was taken but the peak level was above the set Maximum level in percent 4 4 EXTERNAL TRIGGER MODE In this mode WinCamD captures and display pulses by laser synchronization Caution should be exercised once a triggerable laser is connected to the WinCambD The laser could trigger from the shutter signal immediately the camera is turned on a Ctrl T opens the dialog box
56. ceable imagers Coupled with full auto exposure on CW lasers you know that you are always getting the best possible Signal to Noise Ratio on your beam without any effort on your part The FULL mode captures every line The default FAST mode bins adjacent lines and adjacent pixels creating a single effective pixel from four adjacent pixels The size of the Capture Block can be changed from 32x32 to 1200 x 1024 CMOS Imagers Because there is no charge transfer register CMOS sensors do not suffer from the comet tail effects of CCD imagers at short exposure times However not all CMOS sensors are created equal DataRay offer UCM and _UHS CMOS imagers that have synchronous shutter all pixels clocked simultaneously The UHR sensor has a rolling shutter which can lead to horizontally chopped images of pulsed lasers USB 2 0 This 480 Mb s serial port now standard on every new PC uses flexible serial cables and compact connectors WinCamD UXXX cameras are port powered Digital cameras In WinCamD series cameras the software talks directly to the chip This enables external trigger wide shutter speed control and user defined image capture regions with higher update rates The serial digital link from head to PC is insensitive to the EMI Electro Magnetic Interference problems that used to plague analog video links in high power pulsed laser measurements 1 3 SYSTEM CONFIGURATION amp DESCRIPTION WinCamD UXXX imaging systems consist
57. cted in WinCam Setup For the fastest update rate choose Fast and a Capture Block area which is just sufficient to fully capture the pulse Neither Auto exposure nor Manual exposure will change the exposure time The software will totally ignore these settings In a future software release the actual exposure being used in this mode will be shown in the Shutter Control box Exposure settable mode Choose this mode if you wish to use the Exposure time to help control the beam saturation Control can mean attenuating a single wide pulse beam by capturing only a part of that beam e g a pulsed LED or sampling a string of high PRR laser pulses by capturing a larger or smaller number of pulses during each exposure Normally set Exposure 0 95 PRR to capture single pulses Any longer exposure time will capture 1 or more pulses E g If the PRR is 200 Hz set the exposure time to just below 5 ms 1 200 in order to capture nearly every pulse If background illumination levels are a problem set the exposure time to a lower value but at the expense of probability of pulse capture The camera will repeatedly capture beam images as fast as the set Exposure the software amp the PC will allow Pulses with an ADC within the set levels will be captured and displayed Pulses which do not meet the criteria will not be displayed Intensity Variations Because the Auto Trigger mode is asynchronous with the pulsing laser the intensity
58. ction start point al je Drag capture bos to desired location 32 7056 v 0 1024 Piel multiply factors Offset 1 00 Y 100 WwY A IR Camera and Compensation file settings Gamma 1 00 Enable _ amp start 80 oat 4 ADC offset adjust ADC Peak 69 1 1 to 54 G 0 70 581 mi Lock ADC offset disable auto adjust Compensation file location FC CompLo 0 20 CompHi 5 00 Comp First then gamma f No test defaukt C Testmode C Testmode Test mode 3 Not all cameras support test mode Set defaults Cancel WinCamD Series F Slower clock 30Mhz vs 48Mhz 3 27 Quick Start Tutorial 1 2 3 4 5 6 7 8 9 3 28 Capture resolution At the expense of a factor of two in linear resolution you may approximately double the speed of image capture by choosing FAST rather than FULL UHS cameras always operate in FULL mode Capture Block Select the image size that you wish to capture Using a smaller Capture Block may increase the frame rate on some PCs Drag and click it on the small screen in the dialog box in order to place it over the beam area of interest Flip image flips the vertical orientation of the image Its default is unchecked to ensure that positive Y is up Rotate 180 deg does that Its default is unchaecked Gain G X X Most useful when working with pulsed lasers where exposure control is ineffective for pu
59. d Setup screen Some options may be grayed out if they are not available for the system that you w Toolbar are using ow Status Bar Open Close Log Dialog does that Open Close Log Dialog CTRL Open Close M2 Dialog does nothing Open Close Mz Dialog CTRL M Show Non uniformity is now accessed by Show Mon uniForrmity right clicking on the profiles area Open Mz Dialog Open M2 Dialog does that 3 26 WinCamD Series 3 3 SETUP o Capture setup dialog Press ALT S to open the WinCamD Capture Setup dialog The top of the dialog screen shows the Firmware version and the Clock source If you see problems Product Support may ask for this information This screen operates in live mode only i e not on recalled images and allows you to do the following USB Capture Setup USB 2 0 version Quick Start Tutorial EX Capture setup dialog ALT 5 Calibrate current UCM Camera Enter Wavelength Numeric Display Modes 3 3 Set centroid cliplevel Enter Effective Width cliplevel Set geo centroid cliplevel Setup Trigger Enable auto naming Use 150 11146 compliant diameters and angle Capture Resolution FULL 4 65 4 65 microns FAST 9 30 9 30 microns Capture Block camera pixels 32532 C 128 128 C 384 384 C 752 x 752 C B4 64 C 256 s 256 EE rary C 1024x1024 C 1200 1024 C Custom Ox y oY Flip image vertical Rotate 180 deg W Enable auto baseline substra
60. dealt with at different facilities 8 If an International return carefully follow the instruction on the RMA form concerning Harmonized code product description and Value If this information is incorrect then you will be responsible for an excess duties taxes A 8 WinCamD Appendices APPENDIX D WinCamD UCM Offset Calibration Why is Offset Calibration required CMOS imagers have individual readout amplifiers on each pixel These individual amplifiers have a range of DC offsets leading to Fixed Pattern Noise This noise should be subtracted in order to ensure that the CMOS image baseline is correctly and consistently set How often is Offset Calibration required The short procedure should be performed once at ambient temperature upon initial receipt of the camera Thereafter unless the camera is used in circumstances where the ambient temperature differs by more than 3 C 5 F from the temperature at which it was calibrated then no recalibration should be necessary Where is Calibration data held The procedure generates a 3 MB Serial cal file which is automatically saved in the same directory as the DataRay exe executable file normally c Program files DataRay How do I perform Calibration a Install the camera in accordance with the instructions in Chapter 2 of this manual b Set the camera vertically on its lower edge In the Setup pull down menu select Capture Setup Dialog Let it run for 10 minutes to warm u
61. default gamma value of y 1 41 plus the option to implement the uniformity correction file that ships with the camera Check Enable IR Camera box to enable this option If a compensation file was provided format WCDIRCompDxxxx wcf where Dxxx is the serial number on the back of the camera then browse for this file and select it The CompLo and CompHi boxes allow you to set alternative defaults to the maximum and minimum correction factors to be used To reverse the normal correction order check the Comp first then gamma box The Gamma Greek y of a camera is the power relationship between the output video signal and the input irradiance intensity Video Signal Input irradiance WinCamD Series Quick Start Tutorial y values below 1 soften the intensity differences in the scene and are commonly found in consumer and surveillance cameras rarely in industrial cameras and frequently in vidicon style IR cameras Gamma correction is not required for WCamD TCamD cameras which have 1 PLS factor UCM camera only The default value is 1 The software compensates for residual sensor sensitivity during the readout period For a full description see the IMPORTANT WinCamD UCM at Short Exposures Application Note at the website You may ignore the test modes unless directed there by Tech Support UO Numeric display modes is discussed in section 3 2 3 O Set centroid cliplevel allows you set a d
62. e the displayed value for the NinCamD 3 X 3 pixel beamwidth is corrected using the same algorithm as P ae a a is used for slit width correction WinCamD 4 X 4 pixels slower The area image filter for WinCamD series only calculates the average of the sum of the pixels over the specified sample E g on 3 x 3 pixels it takes all nearest neighbor intensities sums them divides by 9 and places the result at the center pixel location WinCamD Series 3 25 Quick Start Tutorial 3 2 12 Camera Selects the camera to be used If only a single camera is attached it will automatically find that camera If more than one camera is attached it will default to the first camera on the list For any other camera you will need to manually select it Alt N selects WinCamD cameras Camera wiew Centroid Setup Shift N selects WinCamD UXX cameras w Auto select camera default ALT O Use all USB cameras sets all connected USB 2 0 cameras to capture images in parallel e g when triggered by the same trigger input pulse Individual captured images are stored in the individual camera buffers and are then read out into the software buffer in a serial manner See page 3 32 for how to scroll through the image buffer There are subtleties to using multiple cameras Download the Application Note at the website USB Camera 1 SHIFT 1 Use all USB cameras 3 2 13 View Allow you to select what is occupying the view Centroi
63. e CCD This will inevitably WinCamD Series 5 7 5 5 Laser Attenuation result in some limited aberration of the laser beam due to both the off axis operation of the spherical mirror and its residual surface imperfections 5 5 3 Use of a long focal length lens Use a high quality long focal length lens to reduce the beam dimension As with the mirror the introduction of any optic can change the characteristics of a coherent beam 5 8 WinCamD Series Appendices APPENDIX A Beamwidth definition amp Measurement Beamwidth Definition 1 Gaussian Beams True Gaussian beams have no edges that is the intensity of a perfect Gaussian never actually falls to zero at large distances from the center This arises from the nature of the circularly symmetric Gaussian intensity profile 2P 2 2 ee w nw 2 2 r p e 2 W Where ris the radius w is the radius at the point at which the intensity has fallen to 13 5 1 e7 of the peak value P is the total power in the beam The ISO standard specifies that a 40o beam diameter measurement should use at least 99 of the power in the beam For a circularly symmetric Gaussian this 99 of total power integrates out to a diameter of 3 03w the point at which I r has fallen to 1 For a Gaussian of Peak I r 50 Diameter 1 2w I r 13 5 Diameter 2w I r 1 Diameter 3 03w 90 I r 0 5 Diameter 3 4w I r 0 1 Diameter 3 7w 100
64. e actual beam 1 Definitions Accuracy versus Precision versus Resolution The Accuracy of a reading describes how close the reading is to the Absolute value of the parameter being measured The Absolute value is the value that would be read by a perfect measurement system in perfect calibration with zero errors The Precision of an instrument refers to the Repeatability of the value obtained An otherwise perfect measurement instrument that was incorrectly calibrated could be described as Inaccurate but Precise The Resolution of an instrument refers to the smallest increment i e above the noise level that the instrument can measure Readout Resolution is the smallest increment that may be read on the screen or via the software interface DataRay software offers several Numeric Display Modes The default is XXX Y um The user may choose other options but simply choosing a higher Numeric Display Mode resolution option does not make Accuracy higher Numeric Display Modes 2 Pixel size pitch quantization The pixel dimension actually the pixel pitch since the fill factor is never 100 is 4 65 um for WinCamD 6 7 um for WinCamD UCM With TaperCamDs the effective pixel size is even larger In fast mode the pixel dimensions are twice as large i Lancel The casual observer might conclude that all i i Cancel measurements must be quantized in terms of the pixel dimension As shown below this is not the case
65. e in the image area place the cursor on the part of the image that you wish to be centered and press p for Pan on the keyboard In live mode only and if the Capture Block is less than 1024 x 1260 if you have a center wheel on your mouse click and hold down the center wheel and drag the image under the cursor to where you want on the screen Measure any distance on a profile Click and drag a line between two features in the profile in order to determine the horizontal distance between these features This is shown as Dist xx x um on the bottom left of the table below the profile Left click in the profile area to delete the line and the measurement 3 2 6 Pull down Menus Fie Device Palettes Average Filter Camera View Setup The majority of the pull down menus are only applicable to live sessions but it is important to take a look at them and read the brief description to understand the versatile and intuitive nature of the software If an item in a pull down menu appears grayed out it is non functional either because of the chosen mode or because it is inapplicable to the particular head connected or because no hardware head or card is present WinCamD Series 3 21 Quick Start Tutorial 3 2 7 File Where there is a corresponding button on the button bar it is Device Palettes Average Filter Camera illustrated below Open crl4o O Open Ctri O Opens save Ctrl s the Open dialog box for files
66. e is a three year product warranty on all standard DataRay manufactured product excluding customer damage Third party manufactured items normally carry a one year warranty Outside the warranty period there is a reasonable minimum repair charge that covers many issues other than customer damage 0 Repair turnaround time target is 5 15 working days Q If you purchased this product via a distributor if you obtain their agreement you may be able to ship the product directly to DataRay for repair 1 Clearly identify the problem and write it down Have the name contact number amp email address of the person with direct experience of the problem at hand when you call Save relevant wef etc files including reference files so that you can show us the problem If a third party is going to call us to arrange the return all this is even more essential Tip 1 Do check that everything is correctly plugged in Never unplug a head except WinCamD heads while the software is on Where possible check hardware and cables by substitution Use static safe procedures when working with PC cards or disconnected heads Tip 2 If The software is not working like it used to remember that you can flush the software to its default configuration by going to File Load Defaults You may also download software upgrades for free from Software Upgrades at the website 2 If you have a production line down due to equipment failure or some other time
67. e on the Power Bar to open the dialog box Peak Area 3 460e 006 shown below Defined Area 476e 005 Enter the power as Detined size Diameter 100 pm measured by a calibrated power meter and the unit of Peak Average 1 000 measurement The power E bar will then display relative Peak Defined 0 000 to the measurement Average Defined 0 000 entered Setup Fluence Hide Fluence If you enter dB or dBm it will recognize these terms and work in logarithmic mode You may also enter 100 as the number and as a label to give answers in Enter relative power and label E nter relative DOWET Enter label mw Cancel 3 36 WinCamD Series Fluence Setup Dialog Peak Fluence Aperture Peak Fluence Aperture Pizels Peak era 3 460e 6 cme Restore Clean cave Cancel Quick Start Tutorial Fluence Test Limits Average Min Max Enable 0 00 0 00 On Defined Min Max Enable 0 00 0 00 TT On Peaki Min Max Enable 0 00 0 00 On Peak Average Min Max Enable 0 00 0 00 n Peak Detined Min Max Enable 0 00 0 00 On Defined Fluence Area M Show Fluence Area Round Square Area units cme C mm Fluence Diameter 100 prn 3 4 Shape Press the Setup Fluence button to open the second screen shown above Choose Round or Square Defined Fluence Area enter the Fluence Diameter and Area units that you require
68. e surface of the chip a Do not blow directly on the fragile bond wires WinCamD Series 3 43 3 6 Quick Start Tutorial 3 6 4 TaperCamD Artifacts The following are inevitable consequences of the use of fiber optic tapers If you the customer find these artifacts to be unacceptable in your application you may return the unit for a full refund but not replacement within 30 days of receipt O Image distortion Schott quotes barrel or pincushion distortion up to 3 from the nominal magnification This distortion tends to be towards the taper edges We do not measure or compensate this distortion Diamond pattern Due to the fiber bundles used in taper manufacture TaperCamD series may show a slight superimposed diamond or chicken wire pattern shadow _ Edge misalignment Early assembly techniques led to a soft edge of up to 5 of the image area where the taper edge is misaligned with the identically sized CCD edge This assembly tolerance is improved to better than 3 on current versions d Response Non uniformity Compensation See Appendix E Sg Win amD Series Capturing Pulsed Lasers CHAPTER FOUR 4 CAPTURING PULSED LASERS 4 1 TERMS AND FEATURES i a ns oak r a or on aeyesnan E E 4 1 4 2 PULSED BEAM CAPTURE INITIAL SETUP ccccecccucuccaueuusureueeuseuseusuauausuns 4 2 4 3 AUTO TRIGGER MODE excuses Gave Sie teenie sind ten coes nex a antaandta feain owtanaiearesadatien vanteant 4 4 4 4 EXTERNAL TRIGGER MOD
69. eeeesseeeeeeeeseeeeeessseunes 3 12 3 2 4 ASO pare Ac eal i RR Te aoe ee eae eC TT 3 13 3 2 5 Change Profile Display ccccccecceceeeeeeesseeeeeeesseeeeeesseeeneeeesgganes 3 15 3 2 6 PUII COWN MENUS c cece cc cce cece cece seen ee eeueeeeeeeeeeneeeeeneeennneetnnneeennennnnes 3 21 3 2 7 PE T Ceti Ga te Rell Cael Ge ce et ree a cicnne cetiass 3 22 3 2 8 DOVINE E neu annette inh eaten ea ee nEse 3 23 3 2 9 Bee FA E E E E e A ORO OY oO AO OE SR ID CR A SN AIS EA TEER OE 3 24 IAO GAVClAOS ata ture A rue eur eur rue eee ener E 3 24 3 2 11 FITE oaa aAa a a E A A cen ula cat cast tea cae aaa tetas 3 25 3 2 12 Camera Pee ee en E E CE AA A A 3 26 3 2 13 A AS E AAAA AA S AAE ANAA NAAN AA AA AAA AA A A EEEE TETEE TETTEN 3 26 3 3 SW Preaek oat haan can bare eee eae eee tate hee E emcee eenses 3 27 S24 TOOLBAR Sstccecsccnasetianedenauaraneoneo penises heco ese a Giamedetasecennutaree 3 30 3 5 SHORT CUTS we teats aa a a a aa beret Obese treaneln eer a a ewe banaitanete 3 40 3 6 HARDWARE QUICK START TUTORIAL ssssssasusasnsssnnssnsnsnnnnsnsnnnannnnnnns 3 41 3 6 1 Precautions and Safety Warnings ssssssssrrsrsrrrresrrrrsrrrrsrrrrerrreene 3 41 3 6 2 SRG UD er a a a A R A nat fate tere mer annem 3 41 3 6 3 Artifacts and Cleaning of the ND filter amp Imager Chip 0000ees 3 43 3 6 4 TaperCam D ArtifactS cccccccce eee eeee eee ee eeeee ee ee eeeeeeeeeeeeeeeeeeeeenneeees 3 44 4 CAPTURING PULSED LASERS
70. efault Enter Parameter Dialog other than the 13 53 1 e The centroid is calculated for all pixels with level above the centroid clip level Currently the level may be set between 5 and 90 If you try to set higher or lower values it will default to 13 53 without warning you Enter Effective Width cliplevel allows precisely that Set geo centroid cliplevel allows precisely that for the Geometric centroid Setup trigger See Chapter 4 on Pulsed Lasers Jitter suppression Inoperative Will be grayed out in a future software revision 0D oO ODODO Enable auto naming A name will be suggested in the format WC_YY_MM_DD_HH_MM_SS Which is a device abbreviation WC followed by the date and time 24 hour clock read off 2WmajorlSO 1559 1 um your computer s clock This may change to a shorter BXYYMMDD_HHMMSS 2WminorlSO 1591 3 um Q Use ISO 11146 compliant diameters and ELP 0 1 deg orientation calculates 4o diameter and beam orientation based upon analysis of the whole Ellipticity 0 98 image rather than simply the line profiles along the crosshairs See Appendix A for equations WinCamD Series 3 29 3 3 Quick Start Tutorial 3 4 TOOL BAR 7 lxcxXoxpxu n F Oil liB SiIDMX Ye Lib EFECAN A Toolbar Button bar functions provide quick access to some items Grayed Out Some buttons are grayed out until you press Stop Some will be grayed out if they are inapplicable to your Device or to your curr
71. elta F 135 8 um Pixel 46774 71 49 Avegaps 0800 Relative Power 0 00 Full 7 Trigger off delay 0 000 ms ae Imager Gain 1 0 hi Exposure time 200 0 ms Auto Eff Exp 0 000 ms Delta 97 9 um Pixel 45974 70 2 Top line info shows for UCM series Effective Exposure A corrected value Not shoen for other cameras Delta the radial distance of the current crosshair position from the current Absolute or Relative zero point Pixel I the intesnsity of the pixel at the current crooshair position in ADC units and WinCamD Series 3 7 3 1 Quick Start Tutorial Right click on the 2D area to open the box below This allows you to w High color palette Select Zoom Monochrome palette w Zoom 1 32 color palette zoom 2 10 color palette Zoom 3 Zoom 4 Ink saver option Seema w Auto orient crosshairs foom 6 Force Crosshairs to zero degrees zoom 7 Force Crosshairs to 45 degrees zoom 8 Don t Show Crosshairs zoom 9 zoom 10 w Crosshairs snap to centroid default Crosshairs snap to geometric center Profile to clipboard Crosshairs snap to peak location Save image as Bitmap file Crosshairs user placed Export to Paint Inclusion region ENABLED Show Image Information 3 8 Lock current inclusion r gion Inclusion region shape is round Inclusion region shape is elliptical Inclusion region shape is square Inclusion region shape is rectangular Define inclusion region shape size and orienta
72. ending on the fit chosen i e at position j on the profile if the Gaussian level is Gj and the profile value is Pj then the deviation at that point is defined as Deviation in 100 Pj Gj Gj E G If Pj Gj the Deviation is 0 If Pj 2 Gj then the Deviation 100 Therefore the Deviation value can be gt 100 and as low as 100 Max Deviation is the maximum value positive or negative of the Deviation Std Deviation is calculated over the fitted region using the Deviation values as calculated above WinCamD Series 3 17 3 2 Quick Start Tutorial O Show Coefficient amp Roughness Additional information is given by the alternative Gaussian Fit Coefficient and the Gaussian Roughness coefficient defined as follows Find the average difference between the Actual point Pj amp the fitted Gaussian Gj A gt Pj Gj N N is the of points For each point determine the difference Dj from the average of the deviation Dj Pj Gj A Determine the sum of D S gt Dj Determine the Gaussian Fit Coefficient C 1 S N N Determine the Gaussian Fit Roughness R 100 x Max Pj Gj Max Pj O Show Top Hat fit The Top Hat fit Determines the 50 of peak outer edges of the profile Defines the center as opposed to centroid of the beam as the midpoint between these two points Determines the mean level of the central 80 of this region It p
73. ent mode of operation Flg Clear Open Save These three buttons in order Clear the data from the screen and Open and Save files Select the centroid mode to determine the X Y position of the xc Xg Xp Xu intersection of the crosshairs Xc the mathematical centroid for all points above the level set in Section 3 3 Xg the geometrical centroid for all points above the set centroid level Geometric centroid is the center of all the beam above the Clip a level with no intensity weighting Xp sets the crosshairs on the peak in the profile Xu allows the user to place the crosshairs N a Normal and Fast Mode N amp F allow display in Normal or Fast display mode When the N button is grayed out you are operating in normal mode and standard and user requested calculations are performed for the beam This may limit the speed of the screen update Select F to tell the software to simply update the screen as fast as possible amp 1 R Go Stop Single Shot and Refind camera s The G button starts the capture of images by the head or press F1 The S button stops the capture of images by the head or press F2 The 1 button initiates single shot capture of images by the head or press F3 The R button refinds the attached camera s B amp Lock Baseline The padlock style Lock and Unlock buttons allow you to Lock the baseline This allows the measurement of beams which overfill the screen and are therefore too large
74. eometric center Crosshairs snap to peak location w Crosshairs user placed inevitable broken and cracked fibers in the fiber optic taper After Background subtraction you will save this as the compensation file WinCamD Appendices 6 Press the background subtraction button The prompt shown will appear Block beam and press OK Block the open end of the tube e g screw on the ND4 0 filter if you have a C mount tube and press OK Unblock the tube press the Go button and let the Average grow to 20 Press the Stop button and Save this file as DXXXX_Default_Comp wcf where DXXXX is the SN on the label on the back of the camera As a default it will save in the DataRay directory by default c Program Files DataRay It is good practice to back it up elsewhere Press the button to the right of the background subtraction button in order to turn it off 7 In the Setup pull down menu choose Capture setup dialog ALT S Click the Enable box and Browse to the file that you just saved Click OK IR Camera and Compensation file settings Gamma Compensation file location yf v Enable 1 00 C Program Files D ataFiay50001 040036 CompLo 0 20 CompHi 5 00 Comp First then gamma Ok Set defaults Cancel Average of 20 8 Press the Go button The screen should appear flat if you are viewing the same scene that was used to take the compensation file 9 If you view a different scene the image will be co
75. er option 32 Wires 64 Wires 96 Wires 128 Wires w Solid Auto rotate Image to cipboard Save image as Bitmap file Export to Paint Clipboard Save image as Bitmap file and Export to Paint WinCamD Series 3 9 Quick Start Tutorial 3 2 2 Choose a Beam Width Definition Q Click on the Clip a or Clip b button to open a Clip level entry dialog box that allows you to choose a Beam Width definition for the displayed line profile QO Clip Level method set at 13 5 1 e7 is the commonly employed de facto standard Actually 13 53 Q Standard clip levels of 13 5 1 e2 50 FWHM Full Width Half Maximum or 86 5 can be selected Clip level entry f Sigma 4 variance method Enable knife edge mode Quick select from the menu ie 13 5 Tez O 50e FHM Any user set percentage 20 5 can be entered in the Clip level input box C of Bee O If ISO 11146 compliant Sigma X 4 Clip level input variance method Second Moment is selected the clip level is ignored With 1 3 504 a beam profile that is a pure Gaussian the Variance definition is exactly the same as selecting a 13 5 Clip Level but if your beam is non Gaussian and most beams are the Variance method may be more consistent An exception to this general rule is that the presence of a significant background level or background noise will skew the Variance reading to larger values Angular Divergence
76. ercentage of the light into multiple orders off to one side The hologram is a surface structure in the fused silica used for silicon wavelength HBSs giving substrate damage thresholds are as high as the 1kW cm of the starting material just like wedges and windows For pulsed beams keep the level below 1J cm7 especially at lt 400 nm A major advantage of HBSs over angled wedges and windows is their polarization insensitivity lt 1 at 10 and 5 at 20 WCamD sampling diffracted heam Incident beam Main Transmitted Beam Diffracted beams at 0 20 Sampling ratios range from 1 50 to 1 2 000 in first order A typical HBS is designed for a sampling fraction so at Ao at 0 in first order For two typical sampling fractions the calculated sample intensities may be calculated as follows Qo So 1 1 100 So 0 05 1 2 000 1 Order 10 So 1 100 ND2 0 1 2 000 ND3 3 2 Order 20 So 2 1 4 10 7 ND4 6 1 1 6 107 ND7 0 3 Order 30 So 3 1 3 6 10 ND7 6 1 2 88 107 ND11 5 WinCamD Series 5 5 3 3 Laser Attenuation Due to manufacturing tolerances the exact value of the sampling factor and angle in third order will vary and the beam may suffer some unspecified level of distortion At wavelengths other than the design wavelength replace So by s and 0o by Sampling fraction s So Ao A i e S decreases as A increases Sampling angle 0 arcsin
77. eries cameras you can hot plug or unplug the head without damaging it in any way 2 Connect the 3m 10ft cable between the head and the PC card For WinCamD UXX booster cables or hubs are required for gt 5m 16ft look under Accessories at the website 3 Start the PC if it not already started The software will automatically determine the camera type 4 Start the software The UXX LED will sequence through Off Red Green TO start taking data click on the Go or the Ready button or 6 Ready press F1 or g on the keyboard If you try to start taking data with no head connected you will get the message No camera detected If the UXX is connected to a USB 1 1 port or there is any problem with your USB 2 0 port e g low current the LED will change to Red and stay Red If you have a WinCamD UCM calibrate it See Appendix D 6 If you have a TaperCamD series camera press Alt S to reach the WinCamD Capture Setup dialog and enter the appropriate PMF value in the WinCamD capture screen TaperCamD UCD12 UHR UHS WinCamD Series Pixel multiply factor 2 25 2 5 2 4 Installation TaperCamD UCD23 UCM Pixel multiply factor 1 6 TaperCamD20 15 UCD12 UHR UHS Pixel multiply factor 3 1 TaperCamD20 15 UCD23 UCM Pixel multiply factor 2 27 Congratulations You have successfully completed installation Problems Reread the instructions carefully and start again from scratch If
78. gnal while the electronic shutter is open Be aware that the terms Trigger Gating and Capture can sometimes be used interchangeably and sometimes imply different things Trigger strictly implies that something happens as a result of some input Gating implies that the presence of something allows something else to happen Capture is the act of capturing a pulse PRR is the Pulse Repetition Rate of the laser WinCamD Series 4 1 4 1 Capturing Pulsed Lasers SNR is Signal to rms Noise Ratio Progressive scan WinCamD Series uses Progressive Scan where the imager is read out as a continuous sequence over the range of interest The frame rate is frame size and resolution dependent Q The electronic shutter opens once per frame The Exposure time integration time can be changed in small steps from 0 050 to 1024 ms Q Imagers perform energy in a bucket integration All photo electrons pulse s plus background incident within the electronic shutter period is integrated An ideal situation is that a single laser pulse falls within the period when the shutter is open and that the background is zero It is therefore important to use a logical procedure to systematically adjust settings to correctly capture beams Consider a laser pulse train A pulse will only be captured when it falls within an open shutter period The pulse train and the imager exposure period must coincide The frame transfer timing pulse reads
79. he beam Ip may be calculated as Io 2xP xxw 2 55 P 2w Signal to Noise Ratio abbreviated as SNR SNR Peak Signal RMS noise Pulse Repetition Rate Pulses per second for a pulsed laser abbreviated as prr ND or Neutral Density is a commonly used logarithmic approach to defining the Attenuation Factor provided by a neutral approximately wavelength independent filter It has the advantage that logarithmic numbers may be added and subtracted whereas attenuation factors must be multiplied and divided ND is defined as ND logio Attenuation Factor Attenuation Factor ND Value 1 0 0 2 0 3 3 0 5 10 1 0 1 000 3 0 10 000 5 0 e g ND 2 6 is a ratio of 400 1 Electronic shutter Most CCD cameras offer a manual pull down menu or software controlled electronic shutter mode in which the exposure integration time per frame may be set effectively acting as an attenuator for CW inputs For WinCamD Series cameras the software interacts directly with the electronic shutter controls on the CCD chip allowing on screen shutter control in small steps from 40 us to 1 s For CW beams the exposure automatically adjusts to the beam intensity Obviously use of an electronic shutter WinCamD Series Laser Attenuation Does not change the Damage Threshold in W cm for either CW or Pulsed lasers Does change the Saturation Level in W cm for CW lasers Does not change the Saturation Level in J cm for P
80. he most accurate measurements center the beam at x y 0 0 For true 40 Variance measurement to the ISO 11146 standard a Gaussian beam diameter at the 13 5 clip level should be a maximum of 55 of imager size 1 6 2 Beam Power Limits Measure your beam with a calibrated power meter before letting power fall on the head The following head damage limits always apply OQ Total power on the head with ND filter must not exceed 1 W or damage may occur LY Imager chips can take a x1000 overload over the saturation level without damage Q Beware of back reflections from the ND filter Employ appropriate eye protection Imager chip Irradiance limits without ND filter Anm Damage Threshold Saturation Irradiance mW cm2 mJ cm uW cm J cm 355 Few 0 3 0 3 0 01 630 gt 10 0 15 0 005 800 0 1 0 004 1060 ii 10 0 4 WinCamD Series oo O Introduction 1 7 MANUAL CONVENTIONS LQ WinCamD Series refers to all DataRay cameras WinCamD UXXX refers to DataRay cameras directly interfaced to USB 2 0 Q click always means left click the mouse button E double click always means double click with the left button E click and drag means left click on the object indicated hold down the button drag the object across the screen to the desired position and then release the button If a right click is required this is clearly indicated as right click selec
81. hievable Centroid accuracy is also beam dependent It can be as good as 1 um since it is arithmetically determined from all pixels above the centroid clip level Image amp profile Averaging 1 5 10 20 Continuous Background Capture and Subtraction User set rectangular Capture Block for capture User set or Auto ellipse Inclusion region for processing ojf files save all WinCamD custom settings for particular test configurations 5 Hz maximum for full frame full screen on 1200 x 1024 WinCamD Series Pass Fail display Log data and statistics Relative Power Measurement Fluence Certification Multiple cameras Camera head dimensions Width x Height x Depth Chip depth from housing filter 0 5 mm Mounting see drawing below Weight Camera Head Minimum PC Requirements Mac version not currently available Introduction 10 Hz max rate for smaller capture regions 1 5 On screen selectable Pass Fail colors Ideal for QA amp Production Min Max Mean Standard Deviation To 4096 samples to be added shortly Rolling histogram based on user s initial input Units of mW pJ dBm or user choice relative to a reference measurement input Fluence within user defined area RoHS WEEE CE 1 to 8 cameras Serial capture or parallel triggered capture 115 x 61 x 23 29 mm 2 65 x 2 4 x 0 9 1 13 without with 5 7 mm high ND filter holder WinCamD UCD12 7 3 15 1 mm WinCamD UCD23 7 5 15 3 mm W
82. ick line mode Save Profile data as text Fill mode Beam Profile Fit to Excel Enter intensity multiplier default is 0 Set profile colors Enter new gain value w Auto Gain default is on Set display um div scale value W Auto Range default is on Enter over scan rato Show dip levels Show Clip Intercepts Show Gaussian fit Show Top Hat fit Show Max amp Standard Deviation Show Coefficient amp Roughness Show Uniformity within Clip A diameter w Show scale grids Q Checking Global selections applies the selected items to all the profiles Q Choose Linear normalized or Log 40db mode profile display modes Both linear modes set the baseline to zero to compensate for ambient lighting and preamplifier offset on a dynamic basis Linear normalized normalizes the profile to 100 and is the default display mode Log modes are useful for assessing low level structure and ghosts in the wings QO Choose between Thin Line Thick Line and Fill mode to choose how the profile is displayed The latter modes are particularly useful when adjusting a laser assembly and observing the display monitor from across the test bench or when saving the screen data for a presentation WinCamD Series 3 15 Quick Start Tutorial Q Enter Intensity Multiplier opens the box shown which Enter Parameter Dialog allows you to superimpose a magnified profile over the Enter value to multiply intensity profile with current profile The mu
83. ile iteratively adjusts the height and width of the Gaussian until the Least Squares difference between the actual profile and the Gaussian profile is minimized 3 16 WinCamD Series Quick Start Tutorial 2Wua 13 5 2120 2 um 2Wub 50 0 1420 0 um oe 83 4 a a ee wT I a Bevin 205198 C EE eS a Fe a E Scale 600 0 umfdiv Peak 827 6 B 0 0 Specifically the steps are Set the centroid position of the fitted Gaussian the same as that of the actual profile Set the area under the fitted Gaussian equal to the area under the actual beam profile i e an equal power requirement If the area under the curve is A and the actual 13 5 diameter is 2W then for iteration purposes the initial Gaussian height is set to H A 2 2W 2 n2 1 596 A 2W The least squares fit iteration starts from the actual 13 5 diameter G 2W is the calculated diameter of the least squares fitted Gaussian 1 596 A G 2W is then the calculated height of the least squares fitted Gaussian GFit in 100 x 1 Sabsolute differences Gaussian profile area O Show Max amp Standard Deviation A vertical red line appears on the graph at the point of maximum deviation and the Max Deviation xx x and Std Deviation xx xX are overwritten in red on the graph Deviation is defined at each position on the profile relative to the fitted Gaussian curve or relative to the fitted Top Hat line dep
84. in brackets after the RMS value is the Standard deviation value RMS gt Xr Yr7 n where Xr Yr are relative values o gt Xr Yr7 n 1 Time interval allows you to set the time interval between samples Samples to be recorded allows you to set the number of samples up to 8192 Clear restarts the plot after a warning Normalize recenters the plot Replay or Replay Fast replays the beam position history Sequence off Press this button and use the and buttons on the numeric keypad to scroll through the data for the deviation data for the individual points To Clipboard puts Beam Wander to the Windows Clipboard To Excel opens the data in Excel Export to Paint opens the image in Paint Save as bitmap does precisely that WinCamD Series Quick Start Tutorial Beam Wander 3 4 Scale radius 10 um Samples taken 137 Max deviation 1 9 um Last deviation 0 2 um Mean O 9um AMS 0 93 um 0 94 Time interval mininurn Samples to be recorded 6192 pear Replay To ClipBoard Normalize Replay Fast Save ag bitmap To Excel Sequence Off Export to Paint 3 35 Quick Start Tutorial Fluence Click this button to see I No Relative Power setting 7 If it says No relative Power setting you need Average Fluence 0 000e 000 ener eves eereke ie Defined Fluence 0 0006 000 Fluence can work Peak Fluence 0 000e 000 Contained Power bx Click anywher
85. inCamD UHR UHS 8 7 16 5 mm WinCamD UCM 8 2 16 2 mm 20 holes aligned with sensor center 4 40 holes on camera rear 155 gm 5 5 oz 1 GHz Processor running Windows XP or Vista 512 MB RAM 10 MB Hard Drive space 1024 x 768 monitor USB 2 0 hi power 500 mA port The software uses floating point calculation therefore a processor with integral numeric coprocessor is required Outline amp Mounting Scale 1 1 1 4 20 0 3 deep 2 69 2 475 1 525 WinCamD Series Threaded 4 40 4 places 2 40 2 20 1 20 C Mount 1 0 32 UNC 2B 0 20 Introduction Saturation Power Energy Graphs Imagers respond to irradiance W cm We address CW and Pulsed lasers separately The graphs are for the WinCamD with CCD sensor Other chips are close to this Graphs are good to within a factor of 2 Beam power above the limits See Chap 5 WinCamD Series Saturation Power Limits 40 us Exposure ND4 0 filter 85 of ADC For Lower limits divide by 25 000 CW Beam Power mW 1000 Higher amp lower powers are possible with available accessories The ND 4 0 filter in place Electronic shutter set at 50 us The gain is set at 1 The Lower Limit is 5 10 x the Saturation Limit Total power in excess of 1 W may crack the ND filter Use the graph right to estimate f
86. is 13 5 See Section 3 3 for how to set alternative levels When Xp Xg or Xu are selected the display changes accordingly O O is the center of the array Toggle Centroid absolute or relative is a button that toggles between Absolute centroid and Relative centroid Pressing Z or A on the keyboard gives the same result Selecting Z resets the relative centroid 0 0 to the current centroid position WinCamD Series 3 5 3 1 Quick Start Tutorial OU Peak xx x is the image peak level as a of the ADC range determined as the peak value for the average of any L shaped group of three pixels within the image Image zoom N isthe current 2D screen zoom 3 1 5 Main Screen Profile Display UO 2Wua amp 2Wub These are the profile widths at the Clip a amp Clip b levels Q Zero level First note that the zero level is a three pixel wide line The center is the actual zero set by the software after subtraction of the baseline The line is set five pixels above the graph zero so that negative noise remains visible 2Wua 5020 um 2Wub 2694 um Eel scale 1200 0 jimjdiv Peak 95 4 B 1 1 The zero level is calculated by taking the maximum filled level of the histogram of intensities below 25 of peak Default mode is background subtraction To set a different zero level see Section 3 3 Offset Profile Scaling Scale xxx x um div for the current Zoom setting Zoom 2X indicates horizontal zoom on a
87. ition Measurement Accuracy See Appendix B Accuracy is not limited to the pixel size Processing Options WinCamD update rate 1 4 available from DataRay with options down to X ray 43 dB 20 000 1 electronic shutter 7 dB 5 1 WinCamD gain control Provided ND 4 0 10 000 1 C mount Neutral Density filters See transmission curves page 1 9 ND 0 5 1 2 4 amp 5 Screw stackable C mount filters available EAM 2 4 wheel stepped variable attenuator 0 to 90 dB CUB and CUB UV 5 90 deviation wedge beam samplers Holographic Beam Samplers 1 amp 0 05 gentec eo HPDA High Power Dielectric Attenuators CVI Laser Line 2D amp 3D plots Normalized or unnormalized Linear or Logarithmic Zoom x10 2D 3D in 10 32 or max colors or grayscale Contoured display at 10 and 32 colors Raw and smoothed profiles Triangular running average filter up to 10 FWHM Diameter at two user set Clip levels Gaussian amp ISO 11146 Second Moment beam diameters Equivalent diameter above a user defined Clip level Equivalent Slit and Knife Edge diameters Gaussian amp Top Hat profile fit amp fit Equivalent Slit profile Major Minor amp Mean diameters Auto orientation of axes Relative and absolute Intensity Weighted Centroid and Geometric Center Beam Wander Display and Statistics 0 1 um processing resolution for interpolated diameters Absolute accuracy is beam profile dependent 1 um accuracy is frequently ac
88. ive and consistent set of settings use the ojf file approach outlined in section 3 2 8 When you next open the software you may carry on with the settings saved on the last exit load the defaults or load a saved ojf file If you are working with pulsed lasers read and understand Chapter 4 The standard cable supplied is a 3 meter 10 ft cable If you need a longer or shorter WinCamD UXXX cable then you may purchase one at your local electronic store It is a standard Male A to Mini B 5 male USB 2 0 cable beware there are other terminations for USB 2 0 cables 2 m extension and 5 m booster cables both Male A to Female A are readily available Warning Some very thin USB 2 0 cables may not work Background image subtraction see Section 3 4 Large images if the beam is larger than the image area you may still measure it at a clip level that lies within the image area even though the edges are outside Set up the beam to a reasonable Peak level and then disable the auto exposure Then block the beam press Alt S and Lock ADC offset Click OK unblock the beam and then measure it in the normal way See the Application Note on measuring large beams at the website WinCamD Series Quick Start Tutorial 3 6 3 Artifacts and Cleaning of the ND filter amp Imager chip The first advice is Do not but sometimes it becomes necessary ND Filter Dust amp Marks If you see what looks like circular diffraction pattern
89. ke a 3 to 10 sample using a optical wedge Note that the wedge gives two reflections of similar intensity but at different angles Use a spacer tube to separate these before both reach the sensor 5 4 WinCamD Series Laser Attenuation Multiple reflections in a wedge beamsplitter Sampling factors of 1 1 000 000 are attainable but multiple internal reflections may lead to interference if the beam divergence is comparable to the beam deviations in the wedge prism Since the angular separation of the beams is 2 if the beam is large and is small it can be hard to determine which beam is being sampled If the reflection coefficient per surface is x around 0 04 4 for material with a refractive index n of 1 5 then for angle of incidence 6 and wedge angle o then samples come off at the following intensities and angles Surface Intensity x 4 Angle x 1 x gt x 1 x x Top xX 4 0 107 9 Bottom 1 x 0 92 0 n Top x 1 x 3 7 10 0 2n n Bottom x 1 x 1 5 10 0 3n Top x 1 x 5 9 10 6 4no y A Bottom x 1 x 2 4 10 0 5n Eventually the remaining energy is totally tax Lax 1x internally reflected As angles approach the critical angle for total internal reflection the sampled intensity becomes extremely sensitive to the polarization of the beam Holographic Beam Sampler HBS A holographic diffractive beam sampler transmits the main part of the beam and diffracts a p
90. lectric Attenuators Attenuation factors up to ND4 0 1 10 000 are available with reflective narrow bandwidth dielectric reflectors Damage limits are very high at 1 MW cm7 at the wavelength of interest Angle of incidence is limited to 10 Wwww cvilaser com Avoid reflecting the beam back into the laser Care must also be taken to direct the reflected beam to a beam dump O Metallic Neutral Density filters Attenuation factors up to ND4 0 1 10 000 are available with single metallic ND filters Avoid reflecting the beam back into the laser Care must also be taken to direct the reflected beam to a beam dump Above ND2 0 metallic ND filters are highly wavelength dependent For these reasons metallic ND filters are normally not recommended O Electronic shutter See the discussion earlier in Section 5 1 This is why the WinCamD Series cameras exploit this feature with direct software addressing of the electronic shutter O Reflection off a window prism or wedge front surface Sampling factors from 4 for an uncoated window to lt 1 for an AR coated window ND1 4 to gt ND2 0 An issue with any such reflection is the degree of polarization sensitivity as a function of angle of incidence Catalog optics companies also offer suitable wedged windows Note that fused silica damage thresholds can be as high as 1 kW cm7 so this can be a very effective way of dumping power The CUB and CUB UV are C mount accessories which ta
91. log file as tex Click on Setup Log to enter sample ae a intervals and periods for up to three societal different sample intervals saving up Recall Lag file Clear log m Status File Number l Samples 0 to three files Press Show example 1 and Show example 2 to see how these boxes should be filled in Setup Logging LOG EVERY 2 5 SECONDS FOR 25 HOURS AS MyShortT ermFile log browse Log enabled data only THEN LOG EVERY 35 SECONDS FOR feg forever HOURS AS MyLongT ermFile log browse V Log enabled data only THEN LOG EVERY SECONDS FOR blank 0 HOURS AS browse M Log enabled data only Else All data is logged OK i i Show example 2 Cancel If you enter two or three different sample rates erieyseni EAE but use the same file name in each AS box the program will log the two or three sample sets Parameter sequentially into the single log file u WinCamD width at Clip 1 Selective logging As a default all displayed Upper Limit results are logged To log only data that is Enabled in the Pass Fail parameters box 1000000 0 um accessed by clicking the individual results boxes see right select Log enabled data only m Lower Limit Click OK to return to Data Logging Control amp iA 000000 0 um Status 3 32 WinCamD Series Quick Start Tutorial The rest of the buttons in the Data log dialog are self explanatory Logged
92. lots a straight line at this level and defines it as 100 for the purpose of subsequent TopHat fit calculations Shows Top Hat fit in 100 1 Total area of deviations Area under line Show max deviation A vertical red line appears on the graph at the point of maximum deviation and the Max Deviation xx x and Std Deviation xx X are overwritten in red on the graph 2Wua 13 5 1519 1 um 2Wub 50 0 29 2 um TopHat 20 a a eS ee ee a o A oaa oo S S St Deviatign 13 3 E eee eee pf ff e E E Scale 600 0 um div O Show Uniformity within Clip A Diameter Found by right clicking on the profiles area Determines the Clip A edges of the profile For the central 90 of this region it calculates the following function in terms 3 18 WinCamD Series Quick Start Tutorial Non uniformity 100 Min 100 Min The values displayed on the profile are the values for the profiles shown In the View menu you can also choose Show N J TR Non uniformity WinCamD only the on unitormity 1 average non uniformity value taken in 360 one degree slices about the centroid is displayed in the left hand panel 32 o Effective Diameter Effective diameter always shown in the left hand Eff diam 2131 5 um panel of results is defined based upon the total area above a certain Clip level Count the N pixels above 13 5 Area of each pixel is Ap Total area N Ap The effective bea
93. lse widths less than several tens of us and the user must insert sampling amp or attenuation in a quantized manner Gain allows the user to set the Peak to a suitable value With CW lasers this is only used if the beam is so faint that even at the maximum 1024 ms exposure with the ND filter removed the Peak is still not reaching gt 80 Offset The offset is automatically set above the zero of the ADC full scale range This ensures that the noise although very low is properly sampled Though optical intensity is by definition always gt 0 voltage noise will have negative components This is primarily a diagnostic tool with limited user utility Disable this function by clicking the Lock ADC offset disable auto adjust box Set the Offset by setting the Offset slider The Offset is shown in mV and as ADC Peak X X by why would you want to Drag capture box to desired location The slider bar allows you to access the full imager width on some sensor options The box below shows the location of the top left hand edge of the box This will be changed to the center of the box in a future software revision Pixel multiply factor Allows you to adjust for ancillary optical elements that may change the scale between the object plane and the CCD pixel plane For TaperCamDs this number is on the label on the back of the camera and on page 1 14 IR Camera Settings now includes the ability to select the Enable IR Camera option with a
94. ltiplier may be any integer between RO 2 and 200 The legend Profile XX will z appear next to the red profile ance UO Show clip levels through Show scale grids allow you to control how busy the display appears Uncheck what you do not need Q When Show clip levels is selected the variable clip levels are shown in blue on the profile In future versions of the software you will be able to click and drag the levels shown on the screen Beam fit algorithms There are no formal Standards on how fits should be done Some aspects of our approach are generally accepted industry practice Some represent specific customer requests that have been incorporated in the software The Algorithms described here are for Gaussian Fit including GFit G 2W Max Deviation Std Deviation Coefficient and Roughness Top Hat Fit including Max Deviation and Std Deviation Non uniformity Effective Diameter In all modes the software first determines and subtracts the baseline If you need a function that is not included in the current version please contact us TIP On slower PCs to speed up the processing do not show these options UO Show Gaussian fit A GFit results line appears under the 2W results and a red line Gaussian appears superimposed over the profile The Gaussian fit is based upon a fit algorithm that whilst keeping the power under the curve constant and the centroid the same as that of the prof
95. m diameter Deff is then Eff Diam 4 N Ap In the Setup menu choose Set Effective Diameter Clip Level to change the clip level from its default value of 13 5 Q The Zoom 1X to 16X allows you to zoom the profile area on which the cursor is currently sitting If Global selections is checked then all profiles will change TIP Pressing i and o on the keyboard zooms the profile in or out respectively and is much faster than accessing the menu Q Profile to Clipboard sends the profile on which the cursor is sitting to the Clipboard Save image as Bitmap file does precisely that Q Export to Paint opens Microsoft Paint and places the profile in the Paint screen From there you can save as a gif or jpeg file 0 Save Profile data as text does precisely that as a txt file WinCamD Series 3 19 Quick Start Tutorial 3 20 Beam Profile Fit to Excel is found by right clicking in the profile area Profile fit values in spreadsheet may be changed by editing cells F30 to H40 in Form1 xls found in the c Program files DataRay directory Contact Technical Support for your custom Excel export requirements A future version will include active export to Excel so that real time adjustment can be monitored Fd Microsoft Excel BeamFit3 xls H File Edit View Insert Format Tools Data Window Help gt x Ai e Favoritesy Gov fy C Program Files DataRay BeamFit3 xls DRAA 464 J
96. mpensated for array variations as long as you look at the same part of the array with the same resolution Currently if your change the Capture block you will need a correction file for that specific Capture Block This _ is complex but may be addressed in a future release A 12 WinCamD Appendices 10 On an actual beam variations between 20 and 500 of the mean will be compensated Average of 20 Uncompensated Compensated WinCamD A 13 App Appendices Index Note A _ refers to pages in the Appendices A Absolute position 3 5 Accuracy A 4 ADC 1 2 Angular Divergence 3 9 Attenuation 5 1 5 2 Auto inclusion region 3 7 Auto Trigger 4 4 Averaging 3 24 Profiles 3 24 Results 3 24 Reset button 3 24 B Background subtraction 3 31 Baseline lock unlock 3 31 BNC 2 1 4 1 Beam Acquisition Measurement area 1 11 Angular Divergence 3 11 Attenuation 5 1 Fit algorithms 3 16 Power Limits 1 6 1 7 1 11 Sampling 5 4 5 5 Select from stored data 3 31 Wander 3 36 Width Definition 3 10 Binary save as 3 22 Button Bar 3 30 C C 2 6 Calibration 1 3 App D Camera select 3 26 Caption Bar 3 4 Capture block 3 28 pulsed lasers 4 1 resolution 3 28 CCD Chip height 1 5 2 Cleaning 3 43 Center profile 3 20 Centroid Averaging reset on drift 3 24 Beam 3 5 Clip level 3 29 Mode 3 30 A 14 Chip height CCD 1 5 Cleaning CCD ND filter 3 43 Cle
97. n any of the triggered modes At this stage you are concerned with ensure that the beam is not too faint to observe and on centering the beam on the imager 4 2 WinCamD Series c There are two triggered modes of operation Capturing Pulsed Lasers Note that the Gain may be increased using the on screen slider located just below the 3D display areas Higher gains assist in setting the signal level Peak xx x to its optimum value of 90 of ADC saturation but at the expense of Somewhat degraded SNR Next minimize the dead Space around the beam by redefining the Capture Region Section 3 6 3 to be as small as possible while still fully capturing the beam If this is not done residual un subtracted integrated image background may be a significant percentage of the pulsed signal and may 4 2 GOOD NOT GOOD compromise correct capture and analysis The software automatically subtracts overall background based upon the lowest signal level in the capture region 0 Auto Trigger where no formal laser synchronization occurs OQ Synchronized mode useful if the laser provides a trigger output or input The sections which follow explain these modes Right click on the trigger delay box located below the 4 3D area in order to EE access the Trigger Setup dialog WinCamD Series Trigger delay 0 000 ms A Click UCM Trigger Setup Trager is OFf Auto Trigger On Exposure setable
98. of the interchangeable camera head 3 m 10 ft long USB cable and the software The system is shipped ready to install on any 1 GHz or higher Pentium PC with 512 MB of RAM and an available USB 2 0 port Longer cables runs up to 5 m are possible with extensions or 25 m with booster cables hubs The imager chip is driven via a FPGA with embedded firmware WinCamD can O define the Capture Block the area of the CCD from which the data should be taken and the Inclusion Region for which the data should be analyzed use Fast mode half Full resolution for large beams amp or initial alignment automatically set the correct exposure time for CW lasers vary the pre ADC gain for pulsed lasers via the BNC accept an external trigger or output a trigger to a pulsed laser ODOovoOvo oO automatically synchronize to the pulses from lasers with PRR s Pulse Repetition Rates between 100 Hz and 25 kHz E advance or delay the capture timing with respect to an external trigger E process and log acquired images 1 2 WinCamD Series Introduction 1 4 CALIBRATION Dimensional beam calibration of a WinCamD Series camera heads is an intrinsic calibration based upon the precision of CCD and CMOS photolithography The nominal dimensions of the chips and pixels are used in all calculations The accuracy is believed to be much better than 0 5 and probably better than 0 1 Dust on the ND filter or
99. or wavelengths other than those shown The variation is due to a combination of detector responsivity versus wavelength and ND 4 0 filter actual transmission versus wavelength 13 5 Beam Diameter in mm CW lasers Pulsed See next page The graph shows saturation optical power that the standard camera configuration with ND4 filter can measure versus beam diameter and wavelength The Saturation Limit assumes 100 Relative Exposure vs Wavelength 300 500 700 900 1100 Wavelength in nm WinCamD Series Introduction Pulsed Laser Saturation Limits See Chapter 4 for setting up to capture pulsed lasers The graphs are for the WinCamD with CCD sensor UCM limits are x2 higher 1 6 WinCamD Series Saturation Energy Limits ND4 0 filter 85 of ADC Individual Pulse Energy This graph is for a single pulse within the exposure period pJ Higher amp lower powers are possible with available accessories 100 10 Fa 0 01 4p p744 a E e Hee oe e e H OTT o o G d rf T 0 001 800 0 01 0 1 1 10 13 5 Beam Diameter in mm PRR is the Pulse Repetition Rate of the laser PRR gt 20 kHz Treat the laser as CW based on the mean mW mJ pulse x PRR
100. ormation Save current data as 16 bit Cancel TIFF non standard does 3 22 WinCamD Series Quick Start Tutorial precisely that Note that there is no standard 16 bit TIFF format These files do successfully import into Windows Paint UO Screen to Clipboard sends the screen area between the Toolbar and the Status bar to the clipboard allowing import into reports generated in other software Other screen saving options are Save current screen as bitmap file and Export screen to Paint To save images as jpg JPEG or gif Graphics Interchange Format files the simplest way is to use the Export to Paint feature in the DataRay software If your version of Paint does not appear to support these file formats see the Application Note at the website O Print Ctrl P Print Preview and Print Setup are self explanatory The software will print the current screen plus the date and a screen plot title The profiles are deliberately printed with vertical elongation for greater visibility To avoid soggy black paper with ink jet printers go to Palettes and choose Inksaver Q Print with Notes allows you to do precisely that The information is saved 5 and may be modified for subsequent prints UO Load Defaults does precisely that useful if things seem screwed up Holding the Shift key down while starting the software has the same effect UO Load Job and Save Job A Job file allows saving and opening particular software
101. out all charge accumulated on the pixels essentially clearing the imaging area Q For pulse duration lt 50 us the electronic shutter can only gate pulse capture For pulse durations gt 50 us the electronic shutter may be used to attenuate the background and the beam intensity Q In some capture modes the electronic shutter is left open continuously The charge in each pixel is read out upon request by movement it into the transfer register without closing the shutter The pixel charges are emptied by the readout Imager gain may be increased in order to increase signal closer to saturation 85 of Peak on the ADC is ideal at the expense of slightly degraded signal to noise ratio 4 2 PULSED BEAM CAPTURE INITIAL SETUP Capturing pulsed beams may require some trial and error to obtain the best results WinCamD covers most conceivable triggering options pulse durations and PRRs If you ignore the advice that follows you may damage the camera head and or your eyes a Read and apply Section 3 6 and Chapter 5 for your personal safety and to set the power falling on the camera head to acceptable levels If you are unsure move the beam in slowly from the edge to first pick up the edge of the beam b Press File Load defaults It is highly recommended that you start in CW mode with the camera shutter on auto watching and centering the occasional captured pulses on the screen If you see nothing in CW you will see nothing i
102. p SY de a vale the Setup pull UCM Calibration Dialog x down menu select Calibrate Camera Seral Number from camera case eo r Default Example D0645 camera to bring up this screen Time Stamps d Look on_ the zx Sas back of the Nowe 2 17 2005 Gm 4 27 25 camera for the DXXXX Serial number at ss tart Calibration 7 middle right of the rear label Type it into the Calibration Report box in the dialog Imager Offset Value 77 Balance Value 77 DISABLE CALIBRATION Save and Exit Cancel WinCamD A 9 App Appendices e Press Start Calibration and this box will appear x IMPORTANT Place lense cap on camera or completely block camera before starting calibration If the cap was taken off put it back on Press OK f The Calibration will proceed When it is complete press Save and Exit Calibration is now complete Problems Reread the procedure amp repeat it Still having problems Please contact Technical Support A 10 WinCamD Appendices APPENDIX E Spatial Response Variation Compensation Applies to TaperCamD TaperCamD20 15 and UXX series cameras You may use this approach to compensate for any spatial non uniformity in the response of the array 1 2 3 4 5 Go File Load defaults This sets Fast mode and a 1024 x 1024 Capture Block in the position shown If you will be working in Full resolution mode select that option
103. perCamD20 15 UCM IR UHR UHS e g WinCamD UHR is a complete working system with a High Resolution CMOS sensor with 5 2 um pixels TaperCamD UHS 1310 is a complete working system with a 14 4 x 10 8 mm FO Taper for 1310 nm Part Number component descriptions Complete working USB 2 0 camera system WinCamD Add CMOS chip extension to generate Part WinCamD with 14 4 x 10 8 mm 1 6 1 FO taper on the CMOS sensor UHS amp UHR only WinCamD with 20 x 15 mm 2 27 1 FO taper on the CMOS sensor UHS amp UHR only TaperCamD TaperCamD20 15 UCD12 2 CCD sensor for CW and Pulsed 1360 x 1024 pixels 4 65 x 4 65 um UCD23 2 3 CCD sensor for CW and Pulsed 1360 x 1024 pixels 6 45 x 6 45 um UCM 2 3 CMOS sensor for CW and low PRR 1260 x 1024 pixels 6 7 x 6 7 um UHR 12 CMOS sensor for CW and low PRR 1280 x 1024 pixels 5 2 x 5 2 um UHS 12 CMOS sensor for CW and high PRR 656 x 496 pixels 9 9 x 9 9 um 1310 an 50 mm C mount tube and long pass filter for 1290 to 1350 nm Camera with 3 mm UG11 filter instead of ND 4 0 Works at 260 through 380 nm On chip IR to visible phosphor converter for 1480 to 1600 nm UV Not available on TaperCamDs WinCamD UCD12 Chip surface height standard and options To request a sensor height increment of 4 3 or 8 6 mm add S1 or S2 to the P N E g WinCamD UCD12 S1 There is an additional charge for these options The case hole is 1 30 20 tpi and the filter holder accepts C mount
104. poses them on the 2D screen Use uses them in the profile area Zoom the 2D profile area x1 to x10 Pressing i and o for in and out on the keyboard has the same effect Hold down the mouse center button to pan left right Options Profile to Clipboard Save Bitmap file and Export to Paint image as Show Image Information gives the data shown right for a live or recalled image Refresh Cancel Image Pixel Information x Axis Pixel Size 4 65 uM Number of Pixels 1024 Multiplication Factor 1 00 Y Axis Pixel Size Number of Pixels Multiplication Factor 1 00 3 2 MANIPULATE THE IMAGE AND PROFILE ANALYSIS This takes you beyond the defaults described in Sec 3 1 3 2 1 3D Display amp Manipulation Q Click and drag in the 3D box to change the view of the 3D image Side to side motion rotates the image Up down motion changes the tilt angle Zoom the 2D image area to palette options Choose a higher Zoom setting to zoom the 3D image Right click the 3D image and a floating menu appears Solid is visually best but processor intensive and can slow the update rate on slower PCs Experiment 96 wires is normally overkill 64 wires are often enough Auto rotate does precisely that but is processor intensive There are three image export options Image to 3D enabled 2D must be enabled w High color palette Monochrome palette 32 color palette 10 color palette Ink sav
105. profile Blank if not selected The scaling at x1 is set automatically by the program Put the cursor on the profile and press i on the keyboard to zoom up to x10 Press o on the keyboard to zoom out Hold down the mouse center button to pan left right O Peak xx x Indicates the peak value of the unnormalized profile as a percentage of the 14 bit 16 392 levels ADC range Note If the pull down menu Filter value is the default value of 0 2 this Peak will be less than the Peak seen on the left of the screen Even with a 0 filter since the Peak on the left is a three pixel average the values will rarely be exactly the same Q B x x indicates the subtracted baseline level 3 6 WinCamD Series Quick Start Tutorial 3 1 6 Main Screen Bottom Line Left Clip levels SpaceBar Lett measures Aight menu KEYS Tn O ut Center eset T upidn up dn OU Status Bar Help Hints VERY USEFUL BUT MUCH IGNORED Almost every area of the screen is a Button which you may left click or right click to cause something to happen Watch the Help Hints change on the Status Bar at the bottom of the screen as you move the cursor across the screen Instructions for using the current function appear here E g for the profile area If at any time you are not sure how to do something move to the relevant area of the screen look at the Help Hints bar and you will often find your answer 3 1 7 Main Screen 2D and 3D Display Area S
106. rations The website is always the source for the most current versions of software manuals application notes specifications parts lists etc At any time you may download the latest version of the software for free plus manual updates and application notes If you need a function that is not included in the current version please contact us Many requested software functions can be added with relative ease and may be done for free and added to future releases If the requested enhancement is extensive and or obscure we reserve the right to quote a fee for the requested change We are committed to providing the ultimate in beam imaging performance and welcomes constructive criticism of these products and of this manual Please contact us International Organization for Standardization ISO 111146 Test methods for laser beam parameters Beam widths divergence angle and beam propagation factor Available from www ansi com 1 2 ABOUT WINCAMD SERIES WinCamD UXXX Series are state of the art real time port powered USB 2 0 cameras optimized for beam imaging They use high resolution progressive scan CCD amp CMOS chips with small square pixels and 14 bit ADC s The CCD chips are directly addressed via customized FPGAs WinCamD Series 1 1 1 1 Introduction The CMOS chips have on board RAM FPGA amp USB 2 0 processor and 10 bit ADCs which are integral on the sensor chips All cameras have window less field repla
107. rve the maximum irradiance limits Section 1 7 2 Damaged imager chips can be replaced in the field but at customer expense Centering Stay within the imaging area for accurate measurements If energy spills outside the imaging area erroneous measurements may result Save files for future reference Press Stop then in the Pull down menu go File Save Save current data to save the single profile image set or Save all data in data buffer to save a sequence of data particularly if you are seeing instability The saved file wef format includes setup data for your instrument Anyone with the software can then view the data exactly as you see it If you are getting strange results or if screen layout is corrupted press Stop In the pull down menu go File Load defaults to reset the default settings and or restart the software If you continue to get any result or inconsistency which you do not understand before you report it save a wef file see above and email the result to your distributor or support dataray com with your commentary Then call See Section 3 6 3 for instructions on cleaning the ND filter amp in extremis the chip You may install a BeamMap Beam R BeamScope amp a WinCamD Series system in the same PC Only one product type will operate at any one time Read the Manual If User Manual authors had their way this paragraph would read If you read this manual first you are entitled to free product
108. s data collection Zooms in Zooms out Pan the profile Resets Profile scale Zoom to 1X Stop stops data collection Selects x profile Selects y profile Opens a file Prints the results Opens Save dialog Opens Trigger dialog Opens Beam Wander 3 40 WinCamD Series JN Quick Start Tutorial 3 6 HARDWARE QUICK START TUTORIAL 3 6 1 Precautions and Safety Warnings Do not skip this If you do not take these precautions you may damage the equipment or your eyes Q Always look up or measure the beam power and try to estimate the beam diameter before analyzing a laser beam for the first time Ensure that it meets the maximum irradiance and maximum power limits in the specifications Follow the guidance in Chapter 5 Be aware of the laser beam path and its reflections Where appropriate use beam blocks and Wear Proper Eye Protection for the wavelength being analyzed To avoid fragmented files always close the program properly Never turn off the computer while the program is active Image spots and diffraction rings See Section 3 6 3 3 6 2 Starting Up a b C d e If you have not already done so install the PC Card and software Chapter 2 Eye Safety If the beam power is high put on your laser safety goggles before you turn on the laser It is your responsibility to determine eye safety issues Use a viewer or phosphor card for beams invisible to the naked eye Disconnect the cable before moving
109. s in Trigger Delay The slide bar is lncated below the Trigger delay 0 000 ms R Click 3D image area 4 l 3 38 WinCamD Series Quick Start Tutorial CCD CMOS Gain The slide bar is located below the 3D image area It is a qualitative not a quantitative illustration of gain i e Gain 1 is greater than Gain 1 but is not necessarily exactly twice as large It offers 5 1 Gain control CCD Gain 1 0 RT 3 4 Exposure Exposure time 0 032 ms Auto A Click control may be accessed by right af clicking on the Exposure time area Defaults are shown For faint beams you may uncheck Enable limits to allow longer exposure up to 1024 ms With UCM cameras the dark current from hot pixels may dominate at long exposures To manually set the exposure uncheck Enable auto exposure adjustment Exposure electronic shutter Control i Enable auto exposure adjustment Exposure Limits kW Enable limits Curent exposure 8 710 ms MIN 0 040 ma Ms 50 000 ma Cancel WinCamD Series 3 39 Quick Start Tutorial 3 5 SHORT CUTS Keyboard Short Cut keys are tabulated below Some require hardware to be present Starts active image acquisition Page Up Access previous image Stops active image acquisition Page Down Access the next image Alt F4 Exits the program Selects absolute position display Opens Camera Setup Selects both profiles Centers the profile in the grid Go Start start
110. s on the screen that do not move with the source image then these are dust specs on the ND filter Sometimes simply moving the image or rotating the filter will move the spots off the image These spots are most easily cleaned with an oil free air duster Some air duster fluid can leave a film so keep the can upright do a test spray to one side first and bend the nozzle if the angle is awkward If the problem is finger marks rub with a small quantity of laboratory grade ethanol or methanol on a lint free cloth paper towels are quite good paper handkerchiefs are appalling Sometimes you have to do an alcohol wash with a cotton bud first followed by an edge to edge blow dry Some marks can be water soluble but not alcohol soluble Rub with a damp lint free cloth Imager Chip Dust If you see very small black spots on the image that do not move with the source image then this is dust on the chip Some level of dust is inevitable so try to avoid the pursuit of perfection However if the dust is interfering with the measurements at your own risk remove the ND filter put the camera under a low power microscope and use an oil free air jet to blow the surface of the chip Some air duster fluid can leave a film so keep the can upright do a test spray to one side first and bend the nozzle if the angle is awkward Damaged chips can be replaced but at your expense 600 for standard chips higher for IR chips QO Do not touch th
111. s well that even with 4 65 um pixels the 2Wva 13 5 99 6 um 2Wvb 50 0 Oo J ee eee Scale 17 5 umfdiv validity of linear interpolation starts to break down as we go to smaller beams This is because the two adjacent pixels start to lie on a curve rather than a straight line segment It is for this reason that the normal advice is to use a smallest beam diameter limit of about 10 times the pixel size DataRay errs on the conservative side and suggests limits of 50 um for WinCamD and 70 um for WinCamD UCM WinCamD A 5 App Appendices A user may choose to measure smaller beam diameters but should be aware of these accuracy limitations 4 Second Moment Diameter The Second Moment Diameter of an image is based upon an area integral weighted by the square of the distance from the beam centroid As such it does not include a specific clip level See Appendix A for a full description and the formulae Since Second moment diameter is a total image based calculation then at least to a first order it is not subject to pixel dimension quantization limits In accordance with the ISO 11146 standard DataRay cuts off the calculation at 99 of the included energy For a pure Gaussian beam 99 of the energy corresponds to curtailing the calculation at a clip level of 1 45 corresponding to a beam diameter 1 29 times greater than the 13 5 clip level diameter For typical beams that are not pure Gaussians these numbers would
112. t or check means left click with the mouse button press always means press the keyboard key 0D OD OO enter means enter using the keyboard e g Enter Alt F S means Press the F key while holding down the Alt key then release the Alt key and press the key marked S Sometimes it is necessary to finish with the Enter key to complete a process UO 8 pt Verdana Bold indicates keyboard entry items or words etc on the screen 1 8 MANUAL AND COPYRIGHT NOTICE This manual describes operation of WinCamD Series Imagers We reserve the right to make changes to this manual amp to the instruments described herein without notice We have made considerable efforts to ensure that the information in this manual is accurate amp complete However we will not be liable for any technical or editorial errors omissions or for any incidental special or consequential damages of any nature resulting from the furnishing of this manual or from the operation and performance of the instruments described herein DataRay retains copyright to the contents of this manual You may make two additional copies of this manual for use with the equipment Copying for any other purpose is not allowed without the express written permission of DataRay Inc Boulder Creek CA BeamScope P7 BeamScope P9 BeamMap BeamMap2 Beam R Beam R2 ColliMate DataRay TaperCamD TaperCamD20 15 WinCamD WinCamD UXXX WinCamD UCD12
113. t you stay with the default values Button colors settings Button colors press color to change Normal T ext Pass Tert Fail T ext Invalid Text BackGround rrr 02000 OxB600FF 0s80FF UxF ar ar 4 Set to defaults Cancel Note particularly that If the software determines or suspects a result to be invalid for whatever reason the numbers will appear in gold yellow orange An example of determines is when the profile peak is gt 100 saturated or lt 10 in either case the results will appear gold as a warning If you are using laser glasses select colors which maximize the visual contrast while wearing those glasses If you wish to highlight a particular set of numbers consider changing the background color Ensure that it is not a color that is too close to the text and or pass fail colors or the visual contrast will wash out WinCamD Series Quick Start Tutorial 3 2 5 Change Profile Display Right click on any 1D profile area to open the display selection box shown here Defaults settings are as shown y GLOBAL SELECTIONS Select Zoom More options ee W Foom 1x Set dip level 1 Meed Help ae Zoom 2x Set dip level 2 3 2 e w Linear normalized Zoom 4X v Auto update 3D on Linear mode Zoom 8x Profile to clipboard Log 30dB mode zoom 16 p Save image as Bitmap file Log 40dE mode og moge Export to Paint w Thin line mode Export Profile data to Excel Th
114. the camera head a large distance You may hot plug and un plug the camera head while the software is on If you continually move the head around with the cable attached drag on the cable may cause the spring clip connector retention shell to bend and weaken Mount the head in a rigid manner such that the head will intercept the laser beam in a plane perpendicular to the beam axis It often helps to install the head or the assembly to be measured on an XYZ stage If you have not already done so read this manual If it is the first time you are using the software but have been experimenting with the settings go File Load defaults to reset the software to its defaults To start taking data press g on the keyboard or click on the Go or Ready button The defaults include auto exposure The exposure will be set to 1 ms initially and then automatically adjust for your beam in the range 40 us to 1024 ms The defaults set the Inclusion Region image size to 1024 x 1024 and fast mode Enter Alt S to enter the setup screen and change the values in accordance with Section 3 3 WinCamD Series 3 41 3 6 Quick Start Tutorial f g h j 3 42 Once the beam is set within the image area the readings will be accurate and the profiles may be analyzed as discussed throughout the earlier in the chapter When you close the software it will automatically save the settings that you were using when you exited To save an alternat
115. tion Show efFective slit profiles Use effective slit profiles Show U and profiles profiles Change the palette selection Includes Inksaver option for printing see Sec 3 2 11 Auto orient crosshairs Force Crosshairs to zero or 45 degrees or Don t Show Crosshairs If you uncheck all these options then you can orient the crosshairs yourself by clicking and dragging on the outer portion of the crosshair Snap to centroid geometric center peak location or user placed These functions are paralleled by tool bar buttons WinCamD Series Set an Inclusion region for image processing The area of the image outside the Inclusion Region will be color reversed Click and drag a chosen shape or select Define Inclusion region shape size and orientation in order to do precisely that Checking the Automation boxes automates the inclusion region The 1 55 default inludes 99 of the energy for a Gaussian beam Show amp Use effective slit profiles i e Quick Start Tutorial Inclusion Shape Size and Orientation Inclusion Shape C Rectangular Square Elliptical Circular Set Clockwise Orientation of Major 0 is Horiz In Degrees 0 Dimensions Major axis microns 2000 2000 Minor axis microns 92 Automation Auto Orient Width Clip a diameter times 11 55 the profiles that would result from sweeping pixel width slits horizontally and vertically across the beam Show merely superim
116. to allow the determination of a good zero level while the beam is on the camera To use this feature block the beam and click on the Lock button Then allow the CW or pulsed beam to illuminate the screen The zero level from which clip levels are determined will be based on the level determined while the beam was blocked Obviously because the beam wings and true zero level are not imaged second moment 40 widths calculated for such a beam are invalid To disable this feature click on the Unlock button 3 30 WinCamD Series Quick Start Tutorial To normalize the 2D and 3D displays click the left hand button x Y B L X Y B amp L allow display of the X profile only the Y profile only Both X amp Y profiles or Large in which the profiles are not shown The Large option allows the viewing of a screen from across the lab Select B to return to the default screen Hli Background subtraction Pressing the left hand button to initiate background subtraction The box shown right will appear Block the beam and then click OK The captured background will be subtracted from subsequent images Press the right hand icon to disengage this feature Hardly ever used To auto subtract the minimum level in the image press Alt S and check the Enable auto baseline subtraction box in the WinCamD Capture Setup dialog box FE 4 Select Beam PPIP Dialog Ee Set Dialog The matrix button opens a dialog that
117. tware 2 3 Intensity multiplier 3 16 Invalid data 3 14 IR camera settings 3 28 Irradiance Beam A 1 Damage 1 11 Definition 5 1 Peak 5 1 Saturation 1 6 1 7 ISO 11146 3 9 A 2 J jpg files 3 24 WinCamD Appendices LabVIEW 2 6 Line Type 3 15 Linear 3 15 Live versus saved 3 31 Log data 3 32 Logarithmic 3 15 M Magnification see Pixel multiply Factor Main Screen 3 2 Major axis 3 5 Manual Conventions 1 12 Maximum Power Graph 1 6 1 7 1 11 Mean axis 3 5 Measuring distance 3 21 Menus Pull down 3 21 Minimum computer requirements 2 3 Minor axis 3 5 Mirrors use of long focal length 5 7 Mode Normal Fast 3 28 Mounting the head 1 5 Index N Neutral Density Definition 5 2 Filters 5 2 Filter cleaning 3 43 Filter transmission 1 9 Normal mode 3 28 Normalize Profile 3 15 O Offset adjust 3 28 ojf files 3 3 3 24 Open 3 23 Orientation 3 5 Outline amp Mounting 1 5 P Palette 3 24 Pan Image Profile 3 21 Pass Fail Criteria Colors 3 14 Setup 3 13 Password 3 13 PC minimum requirements 2 3 Peak Irradiance 5 1 A 15 Appendices of ADC Image 3 6 of ADC Profile 3 6 Percentage Fit Gaussian 3 16 PMF Pixel multiply factor 3 28 Power Bar 3 38 Limits 1 6 1 7 1 11 Maximum 1 7 1 8 1 15 Relative 3 38 Precautions 3 41 Precision A 4 Print 3 23 Print Setup 3 23 Profile Averaging 3 24 Center 3 21 Clipboard to 3 23 Colors
118. ulsed lasers unless the pulsewidth is greater than the minimum electronic shutter period of 32 us 5 2 ATTENUATION OF YOUR BEAM a Using a suitable calibrated Power or Energy meter measure the laser beam total power P Watts or energy per pulse E Joules preferably at the point at which you wish to measure the beam profile b By viewing the beam on a diffuse screen or by using an IR Display Card or IR viewer for IR lasers or by calculation or by some other means estimate the laser Beam Diameter This dimension will be assumed to be the 1 e diameter estimate denoted as 2w If you are using a lens or a microscope objective to magnify or demagnify the beam onto the WinCamD then the beam diameter will vary as magnification M and the irradiance will vary as 1 M7 This dimension should be less than the dimensions shown in Section 1 7 If not go to Section 5 4 c Go the graphs in Section 1 6 If your beam is less than the saturation limits then no further attenuation is required If it is above the limits carry on reading d Calculate any Additional Attenuation required Pay attention to units 5 3 ADDITIONAL BEAM SAMPLING ATTENUATION Choose between the beam sampling attenuation approaches given below Note that since wavefront aberration diffraction and interference results from the inclusion of any optical component in a coherent beam Schemes that introduce the minimum number of reflections optical s
119. urfaces optical media and dust amp fibers on surfaces are clearly preferred The catalog optics companies list a range of suitable accessories Techniques for beam attenuation sampling may fall into the following categories Absorbing Neutral Density ND filters Attenuation factors up to ND5 0 1 10 are available with single absorbing ND filters As standard we offer stackable ND filters each in a circular housing with male and female C mount threads Filters are tilted by a few degrees to avoid interference fringes Standard values are ND 0 5 1 0 2 0 3 0 4 0 Each filter assembly adds an additional 5 7 mm 0 225 in depth in front of the CCD chip Neutral density filters are not truly neutral ND values are normally quoted at 546 nm See section 1 7 for details WinCamD Series 5 3 3 2 5 3 Laser Attenuation We also offer the EAM 2 C mount 4 wheel variable attenuator assembly offering gt 90 dB of attenuation The EAM 2 may be used in connection with a microscope objective to magnify smaller beams onto the WinCamD camera Do not attempt to attenuate high powers or power densities irradiance with absorbing ND filters Absorbed power can cause the filters to shatter presenting danger of injury and camera damage Note that 3 5 diskette material is uniform and has ND 2 0 and is sometimes a quick fix but beware the fire risk if used too near to the focus 5 25 disks are ND 3 0 QO High Power Die
120. vergence of the input beam may be determined by measuring the Second moment beam diameter at the back focal distance from the lens This is true irrespective of the distance of the source from the lens Note that this is not the position of the beamwaist formed after the lens It obviously assumes that the lens does not introduce additional aberrations normally achieved by using a long focal length achromat coated for the wavelength s of interest The far field divergence of the input beam mrad is calculated as 2W F mrad Where 2W um is the measured Second moment 40 beam diameter in the Measurement plane F mm is the focal length of the lens at the wavelength of interest Modelling See Gaussian Beam Divergence Measurement spreadsheet at the Measurement plane I Beamwaist plane website Application This technique requires an appropriate lens and a beam diameter measurement instrument The instrument may be a WinCamD series camera or a BeamScope P7 or Beam R scanning slit XY profiler The lens must have a known focal length be coated for the wavelength s of interest and be at least 1 5 times and preferably 2 times the 1 e beam diameter at the lens Errors in the lens focal length value or positioning of the instrument with respect to the back focal length will lead to errors in the divergence measurement The spreadsheet models these errors The beam must be centered on the lens
121. wee sa laiate what itelan a imate eee ean a aA 2 3 2 3 1 Software Installation INStruCtiONS cece ccc ce cece e eee e eee ee eeeeeeeneeeeenneenee 2 4 2 4 MOUNTING THE HEAD cccececcucucecececaceveucusesesaeaveusususueeraveusututununapas 2 5 2 4 1 Connecting the Head ursinii an tala kuti bata tad bias ede de idee 2 5 2 5 SOFTWARE INTERFACING sci crattelunad ewitiwwtand ieask eaurheiakatentewsvanaeunuasainntans 2 6 2 6 FIRMWARE UPGRADES esse sasesates nen ene eundva saunter anuielat anundahaeawdaneteeaweaner 2 6 QUICK START TUTORIALS ricreare A TN 3 1 3 1 MAIN SCREE Nacre a EE E a E ate sande noe naneaee 3 2 3 1 1 Start TNE SONGI Eana a a Rie a aa T a a a ee 3 2 3 1 2 Examine Previously Saved Data ss ssrsssrrersrrrrerrrrrsrrererrrerrrresrrne 3 3 3 1 3 Main Sereen LOD rarer arane a A E 3 4 3 1 4 Main Screen Left Hand Side usisa AATA 3 5 3 1 5 Malhi Screen Prone DIS play ireak a E 3 6 3 1 6 Main Screen Bottom Line sesessssssssssrsrrrrnrnrrrrrrnrnrrrrrrnrrrrrrrrrarrrerran 3 7 3AL7 Main Screen 2D and 3D Display Area cccccccceeeeeeeeeeeeeeeeseeeeeeeeeeas 3 7 3 2 MANIPULATE THE IMAGE AND PROFILE ANALYSIS ccceceeeeeecuceveueusueuvaeavaves 3 9 3 2 1 3D Display amp Manipulation cccccecec eee eeee eee eeeeeeeeeeeeseeeeeeeeeseneeeees 3 9 3 2 2 Choose a Beam Width Definition ccc cece ccc ee eee e ee eeeeeeeeeneeeenanenes 3 10 3 2 3 Set Diameter Display MOde cccccccceeeeeeseee

WinCamD™-UXXX Series User Manual

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WinCamD™-UXXX Series User Manual