Fairchild CCD-2KLV.TDI User's Manual
Contents
1. a n 4 1 q py em oa y H l T yo has MEE NN e i principal points Note location of object and image relative to front and rear focal points 4 9 2K and 4K LVDS Cable Harness Our family of TDI cameras can be mated with the following framegrabbers National Instruments Coreco Metrox Meteor Drawings that annotate the Bills of Materials Assembly Instructions and Wiring Diagram for each cable harness can be downloaded from our website www fairchildimaging com When using one of the following framegrabbers in your system you can select and download the appropriate cable harness drawing that will provide you information to build your cable harness Framegrabber Model No Fairchild Imaging Cable Harness Part No National Instruments PCI 1424 10499 3 02 1 Coreco PC DIG LVDS 10499 3 02 2 Matrox Meteor 2 LVDS 10499 3 02 3 SECTION 5 Handling Instructions 5 1 A Electrostatic Discharge The Fairchild Imaging Osprey camera uses TDI technology in a CCD base and as all such devices has some limited inherent susceptibility to electrostatic discharge ESD All reasonable and customary design steps have been taken to provide ESD protection circuitry Electrostatic charge placed at the sensor could cause charging of the chip which in some situations might not be readily dissipated and minor impact on performance might be temporarily experience2. E PRELIMINARY OSPREY CAMERA SERIES CAM CCD 2KLV TDI CAM CCD 4KLV TDI ULTRA HIGH PERFORMANCE Line Scan Camera Fairchild imaging DW Camera User s Manual FAIRCHILD IMAGING OSPREY CAMERA SERIES USER S MANUAL CAM CCD 2KLV TDI and CAM CCD 4KLV TDI Rev 073004 2004 Fairchild Imaging Inc Fairchild Imaging Inc 1801 McCarthy Blvd Milpitas CA 95035 1 800 325 6975 www fairchildimaging com PRELIMINARY DOCUMENT The information in this manual is preliminary All information provided in this manual is believed to be correct at the time of writing No responsibility is assumed by Fairchild Imaging for its use Fairchild Imaging intends to make this manual as accurate as possible and reserves the right to make changes to this information without notice Table of Contents SECTION 1 Introduction to the CAM CCD 2KLV TDI and CAM CCD 4KLV TDI High Performance IDiLineScanCamera 5 11 Camera Fl e st ee Ye dl 5 12 Camera Specificato ura 6 p e eg A A ER EM a EY MN 7 1 4 BlOCK Diagram e e 8 1 5 Block bayram Serie o new ine aletle epi 9 1 6 Block Diagram 2K and 4K TDI Camera 88 10 1 7 2K 4K TDI Camera Timing 11 18 Thermal Considerations esce i vin rino ri a De Ra kd eta eio o da eh e Su vd vede laa ad 12 SECTION 2
3. lt 910 e g CAM4KLVDS Camera serial number Detailed description of problem Please attach description with as much detail encountered as appropriate When calling Fairchild Imaging 1 800 325 6975 ask for Customer Support Fairchild Imaging CAM CCD 2KLV TDI amp CAM CCD 4KLV TDI Line Scan Camera User s Manual Rev 073004 35 of 38 REFERENCE A Providing External Trigger Using PCI 1424 Frame Grabber 1 Modify the frame grabber cable with the following connection Refer to the NI PCI 1424 TO 4KTDI LVDS CABLE PIN CONFIGURATION e Disconnect the wires that are connected to pins 95 and 100 of connector 5 SCSI 100 Use a 6 inch coax cable and connect a BNC connector male on one end e Connect the other end of the coax cable center conductor to pin 95 external trigger 0 of connector 5 SCSI 100 e Connect the shield of the coax cable to pin 100 ground of connector 5 SCSI 100 2 Connect the external trigger TTL source to the BNC connector 3 The external trigger function of the PCI 1424 frame grabbers requires National Instrument s Labview software and NI IMAQ software to operate e Start the Labview application software e Open the file Ext Trigger Display With No Vision2 vi attached file Ext Trigger Display With No Vi e In IMAQ environment gt Device and Interface e Create IMAQ PCI 1424 fairchild4K e Select Fairchild CAM 4KTDI for Channel 0 see attached file IMAQ WINDOW ti
4. 90 35 D2 6 D7 36 D23 2 55 DB 35 9 519 0 9 2025 a D 3 X D25 mbo D206 c J96 D28 programming 2 3 Power Supply The camera uses a single voltage input normally set to 12 volts 0 7 Amps typ supplied through a Hirose connector The supply must support a 850mA current surge for 100ms for proper camera operation Ripple and noise is required to be lt 50 mV RMS for best camera noise performance Cable construction with shielded and grounded shields is required Hirose HR25 7TR 6P Receptacle 12V NC 2 4 LED Indicator Status Lamp The LED is bi color to indicate the status of the camera operation The LED color is green after initialization If external SYNC is stopped or disconnected it will turn RED Power Up LED RED e Remains RED for approx 0 1 second then turns to solid green e Ifthe LED remains RED or does not illuminate the camera failed internal power up operation and should be returned to Fairchild Imaging for repair Master Mode LED GREEN e After power up with no EXSYNC input the camera will default to Master Mode operation The LVAL line valid signal internally generated by the camera will be at 23 191KHz line rate without any need for external trigger Slave Mode LED GREEN e Once an EXSYNC signal is received the camera goes into a slave mode The LVAL lin
5. CameraHardwarelnterface 1 00 eee nanus nnn an 13 2 1 JnstallatloD OVerVIQW soe aa a lal CD lala ale 13 2 2 Connectors PinoutsandCables 14 570000 A laa b 0 16 2 4 LED Indicator Status zs sceau Reo ais adam aa b 16 SECTION 3 Camera Cont ol et 17 3 1 G lek Start wit V DS Menace i crate bert dais 17 2 2 ContFol NGO ITS seen dede RE cet A etx V tribe aba cd dn GS EN dE 17 3 3 Providing External Triggering 18 3 4 Frame Grabber Receives Trigger 8 88 2 222 28338333 3 19 S os Frame Moderada 20 CONNECCION e eyn n l m 22 3 1 TO Lendthieleclolsse sies e Mile kpa bla el nerme 23 9 0 Gain and Offset Caldas Sunis a ccc eeu emu ebat sag aksi ln A A AA dt 24 3 9 HowtoModifyGain amp OlfisetValues 24 210 Data BUS EE E 29 SECTION 4 Mechanical and OpticalConsiderations 010000000 26 4 1 Camera DimensionsandMounting AMMAA A A e gt m gt mI gt m gt m m m gt gt gt mm gt nnns 26 d 2 LENSES kesi lal lala e atman pll daum alm iile 27 4 3 Mechanical Drawing of Optical Camera Face Mounting L Bracket 28 Z4 LENS OS n BUMU 28 4 5 Positioning Accuracy of the Sensor Chip in
6. LVDS technology one of the big differences is a digital I O works with 1 300V as a high binary 1 and 1 20V as a low binary 0 Low voltage means that the standard 5 volts is replaced by a small differential signalling voltage Additionally LVDS uses a dual wire system running 180 degrees opposed Standard TTL signaling the data storage is based upon the actual voltage level compared against ground The voltage level can be affected by wire length longer wires increase resistance which lowers voltage LVDS data storage is distinguished only by positive and negative difference values not the absolute voltage level Therefore data can travel over greater lengths of wire while maintaining a clear and consistent data stream 3 2 Control Inputs The Osprey family of cameras accepts user control signals through the DB15 connector on the back of the camera Pin configuration is detailed in section 2 2 1 EXSYNC Triggers Line Readout The 2K and 4K TDI cameras require EXSYNC for synchronization The rising edge of EXSYNC triggers line transfer and line readout EXSYNC must toggle from logic LOW to HIGH If EXSYNC does not toggle from one state to the other the camera will not output valid data The minimum EXSYNC frequency for the Osprey cameras is 300 Hz One more word about EXSYNC remember that the rising edge starts the line transfer and the falling edge must be a minimum of 100 nS after rising edge 3 3 Providing External Tri
7. the Camera 29 2 0 nana Ue 29 aur NNO Soll BS imi etre vem i pesce ati t d A 29 4 2 MEMS MOGEN P m 30 4 9 2K and AK LVDS Cable Harness 30 SECTION 5 nandling INSTUCUONS cri 31 Electrostatic DISChIarge ar a o a nea Cake 31 52 Preventing ESD Damage condi 31 5 3 Protecting Against Dust Oil and Scratches 31 5 4 Cleaning the Sensor VVIDIGOW ia oe oon Unete tego lisa 31 SECTION 6 a a bayan 32 6 1 hec Simple TAIN GS FS En Bay nl b aa elm la e ans 32 6 2 Use the Camera Control Interface to Perform Checks 32 b Other Areas YOL SNOU d CHECK alabildi ede bal ri 32 SECTION 7 Product e dias 35 REFERENCE A Providing External Trigger Using 1 1424 Frame Grabber 36 REFERENCE B introduetion TO LVDS mE 37 SECTION 1 Introduction to the CAM CCD 2KLV TDI and CAM CCD 4KLV TDI High Performance TDI Line Scan Camera 1 1 Camera Highlights Description The Osprey TDI camera series is an ultra sensitive camera design for use in line scan applications that demand high performance under low light conditions This series of cameras is based upon Fairchild s CCD525 array which is us
8. Imaging Area VSW 4 Direction e Pixel 1 Locations TDIRow1 L Z gt Shield H1 WC pu VOG H4 C VDD V IY Ve Vbias H Shift Poma Light Vout1 Vout2 Vout3 Vout4 VRD1 VRD2 VRDB VRD4 Fairchild Imaging CAM CCD 2KLV TDI amp CAM CCD AKLV TDI Line Scan Camera User s Manual Rev 073004 9 of 38 1 6 Block Diagram 2K amp 4K TDI Camera Analog Video LVDS Data Out DC Buffers Processors Buffers Connectors 5 2 BIAS 25 0MHz SUPP Hi Speed z gt C Clock Drivers gt O al gt PWR H1 2 3 4 OR SUPP gt mq Outputs i i gt 4 J8 J4 10V Timing gt a i 5 2A amp I O 8 8 npu 5 0D i Power 3 3D Control SHP SHD 12 0V 3 0A GND 2V Mode SV I O Connector Low Speed Buffers J5 Clock Drivers 3 3 V1 2 3 OX VSWx Fairchild Imaging Fairchild CAM 4k TDI ppt 4 1 7 2K 4K TDI Camera Timing Diagram Note Timing diagram not to scale FEL LAST PIXEL Jo STROBE period PIKSEL 402 K LVALSetup Time BLANKING LINE VALID WAL Period 3 ES Y L min setup time ETERNAL STNL gt EASTNL min pulse width 4K TDI LVDS Strobe period LVAL set up time Line period min Blanking ExSync min pulse width 1 8 Thermal Considerations The Osprey camera series has been thermally designed to separate the camera electronics from the image sensor The senso
9. LV TDI Line Scan Camera User s Manual Rev 073004 26 of 38 4 2 Lenses The 2K and 4K TDI cameras as shipped from the factory accept M58 optical components with M58 threads The 4K TDI camera only accepts M58 lens types A sample lens system for 256 DPI would include the following 40mm lens Schneider P N 25 014798 Folus Mount Schneider P N 21 013048 Adapter Schneider P N 25 020054 When the lens mount lens extender tube and its lock ring is removed the front surface of the camera is seen as a square with a large threaded hole in the center The z distance from the surface of the square to the top of the sensor is 10 0mm For the 256 DPI example above the Free and Clear distance between the camera and object is 393mm 4 3 Mechanical Drawing of Optional Camera Face Mounting L Bracket Contact your Fairchild Imaging representative for more details 5 250 THRU 5X 6 380V 005 R 25 1 00 60 R 15 P 125 2 50 STOCK 1 00 4 4 Lenses Fairchild Imaging does not supply lenses An example lens setup is detailed in Section 4 2 above 4 5 Positioning Accuracy of the Sensor Chip in the Camera Position accuracy of the sensor chip in the horizontal and vertical direction is 2 mils Rotational positioning accuracy is as shown Reference position is the center line of the four M4 mounting holes of the camera housing Since the translatory and rotational positioning tolerance depend on each other the
10. are several things that can cause this condition Try increasing and decreasing pixel gain until you find the right setting Look for an increase in dark current If the ambient temp increases this will cause noise in the image Look at your light source Keep in mind that it is better on the side of too much light rather than too little Excess light allows internal gain reduction in the camera which in turn improves camera dynamic range Also if your light source is AC instead of DC this will make the image look noisy If the object you are inspecting has different surface textures it can produce an image that may look noisy Bits That Do Not Change Value If you see that data bits are not changing values after you have changed them then the first thing to check is that the camera is not saturated by preventing light from entering Following that the data cable should be checked for correct wiring and grounding All Fairchild Imaging cameras are delivered after completing an extensive set of Quality Conformance Inspection steps These checks include no stuck bits are present in the camera output PRELIMINARY Product Support If after troubleshooting your camera you are still having problems collect the following data about your application and call Fairchild Imaging Customer Support Note You may also want to photocopy this fax page for sending information to Fairchild Imaging 408 735 7352 ves EEN li 5175777 w
11. cross a wide range of frequencies Driver How LVDS Works LVDS outputs consist of a current source nominal 3 5 mA that drives the differential pair lines The basic receiver has a high DC input impedance so the majority of driver current flows across the 100Q termination resistor generating about 350 mV across the receiver inputs When the driver switches it changes the direction of current flow across the resistor thereby creating a valid one or zero logic state The LVDS Standard LVDS is currently standardized by the Telecommunications Industry Association Electronic Industries Association ANSI TIA EIA 644 A LVDS Standard The generic multi application LVDS standard ANSI TIA EIA 644 A began in the TIA Data Transmission Interface committee TR30 2 in 1995 It was revised and published as ANSI TIA EIA 644 A in 2001 The ANSI TIA EIA standard defines driver output and receiver input characteristics thus it is an electrical only standard It does not include functional specifications protocols or even complete cable characteristics since these are application dependent ANSI TIA EIA 644 A is intended to be referenced by other standards that specify the complete interface i e connectors protocol This allows it to be easily adopted into many applications To learn more about LVDS visit National Semiconductor at www L VDS national com
12. cting the J7 J8 data cables and probing the connector pins with an oscilloscope Remember the camera will free run at the maximum scan rate even with no frame grabber connected This makes diagnosing connection problems quick and easy Horizontal Lines or Patterns in Output To eliminate this type of problem use a DC light source Also verify that data cables and ground shields are in place and connected Inferior cables do result in degraded image transfer fidelity No Output or Non Specification Output If your camera has no output or is putting out an unspecified signal unkown to you check the length of your cable If it is unnecessarily too long and not shielded your cable most likely is picking up radiated noise and is inputting the noise into your image acquisition system Vertical Patterns in Output Sometimes you might see patterns in your output Most likely these are caused by dirt on your lens or possibly contaminants on the sensor window Clean both to remove all contaminants Some vertical patterns can also be caused by improperly wired or shielded data cables also Images Are Too Bright or Too Dark The causes to this problem should be obvious but many times are overlooked If your captured image is too dark or light then experiment with the lens aperture Sometimes if you lengthen or shorten the Line Rate Period ExSync time this will affect your image Don t forget to check your lighting Images Look Noisy There
13. d Therefore do not insert your finger or any other object into the lens mount barrel 5 2 AN Preventing ESD Damage Please be certain to ground yourself prior to handing the camera Ensure that your working environment is grounded including conductive floor mats Do not touch the window of the imager 5 3 AN Protecting Against Dust Oil and Scratches Be certain to avoid dust buildup on the sensor window where it could block the optical path By not touching the surface of the sensor you avoid introducing oil and avoid scratching the sensor window Again you should not insert anything into the lens mount barrel 5 4 AN Cleaning the Sensor Window Use only clean dry air to blow off particulate matter on the sensor window If cleaning of the sensor window is required use lens wiping cloth with a small amount of eyeglass cleaning fluid Do not use solvent as it may smear the sensor window SECTION 6 Troubleshooting 6 1 Check Simple Things First When troubleshooting you want to start the process with the obvious components contained within your system Computer system hardware amp software Is the frame grabber plugged into the correct slot on the mother board Are all electrical connections secure Check to make sure that your light source is fully functional Make sure that the pin configurations for all of your cables are correct Make sure you have selected the correct lense for your camera 6 2 Use the Camera Contro
14. e valid signal period will track the SYNC input period The line rate will vary according to the external trigger e The camera will remain in the slave mode until power is turned off see Master Mode e Ifthe EXSYNC external trigger is lost during Slave Mode operation the LED will become RED This indicates that the external trigger is interrupted and should be checked e Verify that the external trigger is not disabled e Verify that the control connector is connected and secured properly SECTION 3 Camera Control 3 1 Quick Start with LVDS Interface Follow your frame grabber manufacturer s instructions when inserting the frame grabber card into your PC Be sure that you install the correct configuration software that matches the camera that you are using Fairchild Imaging supplies configuration files for each camera type To enter into the realtime display place your cursor in the window and hit return At this point your camera should already be connected to the DC power supply and connected to the frame grabber in your PC As soon as your camera starts communicating with the frame grabber you can verify this fact by looking at your monitor and observing the video signal A quick word on LVDS LVDS is short for Low Voltage Differential Signaling a low noise low power low amplitude method for high speed data transmission over copper wire LVDS differs from normal input output 1 0 in a few ways When a system uses
15. ed in the very successful U S Postal Service Wide Field of View WFOV Camera The 2K camera versions have 2048 pixels in the cross scan direction with selectable TDI stages up to 96 rows The 4K varieties have 4096 pixels in the cross scan direction also with selectable TDI stages up to 96 rows The 2K Osprey supports scan rates up to 46K lines per second while the 4K yields up to 23K lines per second Both the 2K and 4K styles have LVDS outputs The LVDS output supports 4 port 8 bit synchronous data This camera also includes sophisticated features such as anti blooming programmable gain and offset It is packaged in a very compact and rugged housing that contains a standard M58 x 0 75 base lens thread Optional Nikon F lens adapter is available 2K x 96 TDI Sensor Architecture Uses time delay and integration sensor architecture User selectable TDI lengths of 96 64 48 32 Line rate up to 46K lines per sec 1000X antiblooming Non volatile gain offset value memory lt 1 LSB Noise RMS 4K x 96 TDI Sensor Architecture Uses time delay and integration sensor architecture User selectable TDI lengths of 96 64 32 16 25MHz pixel clock Non volatile gain offset value memory lt 1 LSB Noise RMS Programmability Simple menu based configuration for selection of gain offset operational control and diagnostics e LVDS camera PC communications with Fairchild supplied user GUI Usability Programmable gain offsets and controls e Ea
16. f e Run continuous capture on the Labview application see attached file Ele Edt Operate Jools Browse Window Help om REFERENCE B Introduction to LVDS National Semiconductor first introduced LVDS as a standard in 1994 National recognized that the demand for bandwidth was increasing at an exponential rate while users also desired low power dissipation This exceeded the speed capabilities of RS 422 and RS 485 differential transmission standards While Emitter Coupled Logic ECL or PECL was available at the time it is incompatible with standard logic levels uses negative power rails and leads to high chip power dissipation These factors limited its wide spread acceptance LVDS is differential using two signal lines to convey information While sounding like a penalty this is actually a benefit The cost is two traces or conductors to convey a signal but the gain is noise tolerance in the form of common mode rejection Signal swing can be dropped to only a few hundred millivolts because the signal to noise rejection has been improved The small swing enables faster data rates since the rise time is now so much shorter Getting Speed with Low Noise and Low Power LVDS is a low swing differential signaling technology which allows single channel data transmission at hundreds or even thousands of Megabits per second Mbps Its low swing and current mode driver outputs create low noise and provide very low power consumption a
17. ggering There are two ways to provide external triggering to the 2K amp 4K TDI LVDS cameras e Directly send the external trigger to the camera s DB15 connector as mentioned e an external trigger the frame grabber and it will send the EXSYNC signal to the camera 3 3 1 Direct Trigger In this configuration the EXSYNC is sent directly to the camera from the external LVDS trigger source frame grabber shaft encoder etc 3 3 2 LVDS Trigger Source If the external trigger source is LVDS it can be directly interfaced to the camera as illustrated below CAMERA CONNECTOR J5 EXSYNC gt EXSYNC DSUB 15 P DIRECT TRIGGER 3 2 3 TTL Trigger Source If the external trigger source is a TTL level the signal needs to be converted to a LVDS signal before sending it to the camera An example of this circuit is illustrated below EXT TRIGGER gt 7 SN65LVDS3487 SO DSUB 15 P Pil IRIGGER SOURCE 3 4 Frame Grabber Receives Trigger When using the frame grabber to provide an EXSYNC to the camera the frame grabber receives the external trigger source and it generates the EXSYNC The EXTERNAL TRIGGER input signal will depend on what brand of frame grabber is used to interface to the camera Consult the manufacturer s data sheet for the available types of signal level The following illustration shows the EXSYNC connection between the National Instrument s frame grabber and the camera control input DB15 connect
18. l CHE Gain Offset 1 405 b4 400 pd I TIT 405 pd 400 b4 Firmware Head d Sect poart LPT1 LPT2 Fairchild Imaging g Note When saving directly into ROM stored values are not applied until after power cycle Values written to RAM are implemented immediately 3 9 How to Modify Gain amp Offset Values NOS Read the data stored in the ROM and record the factory adjusted values Enter the gain changes for CH1 through CH4 Write the changes to the RAM e Atypical value with optimal noise performance is 400 e Recommended maximum values is 600 maximum value is 1023 Use a flat illumination source inspect the gain balance between the four channels Repeat step 2 to 4 until all the channels are matched Enter the offset changes for CH1 through CH4 with lens cap on Write the changes to the RAM A typical value is 64 With no illumination to the CCD completely dark inspect the offset balance between the four channels Fairchild Imaging nominal Dark Field Value is 4 0 DN Repeat step 6 to 8 until all the channels are matched 10 11 Select WRITE ROM The data will be permanently stored in the EEPROM Power cycles the camera to apply stored values from the EEPROM 3 10 Data Bus The 2K and 4K TDI cameras have 4 channels of 8 bit digital data in RS 644 LVDS format See Reference B of this manual for detailed information on RS644 Both 2K and 4K TDI cameras
19. l Interface to Perform Checks In the Camera Control GUI to verify that the camera returns preset data Typical Gain Values are 400 while typical offset values are 64 Values such as 2047 indicate the camera is not communicating properly and the I O cable connections or wiring is suspect 6 3 Other Areas You Should Check Contact Customer Support Before you call for support be sure to make a note of the camera settings and the frame grabber settings you are using You should also have saved captured live images Customer Support will frequently request that you e mail copies of these captured images See Section 7 Connections Double check the pin outs of your cable Make sure that the connections to the back of the camera and to your PC are secure Power Supply Voltage Make sure and measure that you have 12 0 volts at the camera connector Noisy Power Supply Check your power supply voltage output s Check also the noise and ripple specification of your power supply and measure both at the power supply output Everything Seems to be Working But No Image Remove the cover from your PC and reset all the cards into the mother board Sometimes when you move your PC cards inside the PC work themselves loose Don t forget to check for optical path obscuration also Data Clocking Output Signals Verify the presence of all data clocking and output signals at the connector pins on the camera housing This is easily done by disconne
20. nnector DB15 READOUT TIME c EXPOSURE TIME FRAME PULSE 1 Provide the LED vvith a trigger pulse that is active high during the camera s exposure time An inverted FRAME SEL pulse vvith LED driver could be used This requires a LVDS receiver that will convert the FRAME SEL signal to TTL This signal will turn ON a transistor or a FET to drive the LED light source If a TTL signal is available from the frame grabber this could directly drive the LED driver 3 7 TDI Length Selection TDI length selection for the 2K 4KTDI LVDS camera can be selected using the combination of TDISELO and TDISEL1 input signal into the DB15 control connector The TDISELO and TDISEL1 are LVDS level signals They are typically wired to the user control 1 O of the frame grabber For 2K 4KTDI LVDS cameras the TDI lengths are available for 96 64 32 and 16 They are programmed a follows TDI LENGTH TDISEL1 TDISELO 96 HIGH HIGH Default Setting 64 HIGH LOW 32 LOW HIGH 16 LOW LOW HIGH Logic 1 LOW Logic 0 For 2KTDI LVDS camera the TDI lengths are available for 96 64 48 and 32 They are programmed a follows TDI LENGHT TDISEL1 TDISELO 96 HIGH HIGH Default Setting 64 HIGH LOW 48 LOW HIGH 32 LOW LOW HIGH Logic 1 LOW Logic 0 3 8 Gain and Offset Calibration Gain and offset calibration are supported with use of the Fl LVDS Camera Control graphic user interface GUI EJ Camera Contro
21. olpi 18111 001 linght line source default camera gain Measured across 1 tap 512 pixels 2K 1024 pixels 4K Typical offset 20 C ambient Excludes last pixel of OS1 and first pixel Measured across all taps Measured on each tap relative to next ten pixels Measured at Vsat Measured with digital outputs terminated in 100 ohms OO BEN A delta window of 8 pixels is examined and shifted by half its window First and last pixel excluded from each tap 8 Camera will operate below min line rate with degraded performance 9 Power supply must support gt 850 mA surge current 1 3 Image Sensor The family of Osprey cameras use the following Fairchild sensors The 2K x 96 TDI camera uses the CCD525 sensor and the 4K x 96 TDI camera uses the CCD545 sensor Both sensors have 13um square pixels on a 13um pitch Both sensors are approximately 96 times more sensitive compared to line scan cameras 1 4 Block Diagram CCD525 Vsink VSink Diode VSink Gate VSKG TDI Row 96 V2 VSW48 V3 e 2K x 96 TDI Imaging Area VSW32 TDI Scan VSVV24 Direction Pixel 1 Locations TDI Row1 d 4 Light atic Shield H1 X H2 VOG T V IV MV VSG Vbias H Shift Direction V 2048 x 96 stages PRELIMINARY 1 5 Block Diagram CCD545 4096 x 96 stages Vsink VSink Diode VSink Gate 4 VSKG TDI Row 96 V1 VSW 64 V2 VSW 32 m VSVV 16 TD Scan i TDI
22. or The frame grabber receives the TTL external trigger on pin 95 and generates an EXSYNC LVDS level on pins 33 and pin 34 This signal is then sent to the camera via twisted pair wires In order to have the frame grabber generate EXSYNC signal some software programming using National Instrument s Labview application software is required This circuit is illustrated on the following page GROUND o CAMERA FXTERNATL CONNECTOR TRIGGER J3 95 J5 TTL 100 M EXSYNC 12 5 AMP 100 m 24 EXSYNC 4 K FRAME GRABBER DSUB CONNECTOR 15 P AMP 100 3 5 Frame Mode Framing mode is an excellent tool for mechanical and optical aligning of the camera to the target Frame mode is available in master mode only and the line rate is fixed at 23 19 KHz The circuit is shown on the following page m m uu 22 2 2 02 0 22 WIRING CONNECTION USER I O FRAME SEL pin 5 CAM DB15 FRAME SEL bin 13 USER I O CAM VSYNC VSYNC FVAL pin 45 CAM HSYNC LVALB bin 20 J8 HSYNC LVALB vin 45 3 6 System Connection F LED TRIGGER Inverted FRAME SEL e emi Driver 57 M FRAME SEL SIGNAL Arrav Ei T HSYNC CAM E x R S G VSYNC E R A B B E R How to operate in framing mode 1 The camera must be running in master mode External sync signal cannot be present at power up 2 Provide aLVDS active low FRAME SEL LVDS signal to pin 5 and pin 13 of the camera s control co
23. ou want 100um on the web to be represented by one pixel Zum Number of Pixels Total width of image 10 cm 1000 pixels Necessary Desired resolution 100um per pixel Magnification Pixel size 13um 0 130 Desired resolution 100um per pixel EXSYNC Web speed 2m s 20KHz Desired resolution 100um Shaft Encoder You require one pulse for every 100um of Circumference object travel Assuming a shaft web encoder 0 10m Producing 1000 pulses rev shaft Circumference must be 1000 x 100um Remember TDI cameras require PRECISE synchronization with the object velocity See example images below il NE k Wh j f Good TDI Synchronization Bad TDI Svnchronization lt Fairchild Imaging CAM CCD 2KLV TDI amp CAM CCD AKLV TDI Line Scan Camera User s Manual Rev 073004 13 of 38 PRELIMINARY 2 2 Connectors Pinouts and Cables P N CAM4KLVDS e s DINE Ll 2 2 1 CONTROL DB15 Connector Amphenol Hood 17 1657 15 AMP Receptable 205205 2 ExSync FrameSel FrameSel TDISELO TDISELO TDISEL1 TDISEL1 SCLK S Data In RESETIN S Data Out Fairchild Imaging CAM CCD 2KLV TDI amp CAM CCD AKLV TDI Line Scan Camera User s Manual Rev 073004 14 of 38 2 2 2 LVDS Data J7 amp J8 connector 3M 10140 6000EC connector 3M 10340 3210 000 hood or equivilent Camera Pin Camera Pin a DO 438 DM6 m po sds7 98 D
24. output the clocking signals STROBE and LVAL 3 10 1 STROBE STROBE is an internal pixel clock inside the camera fixed at 25 MHz data rate To acquire valid data frame grabbers usually latch to the rising edge of STROBE with LVAL high 3 10 2 LVAL Horizontal Synchronization LVAL is a horizontal synchronization signal When LVAL is in logic HIGH the camera 2K or 4K TDI will be outputting valid data PRELIMINARY Mechanical and Optical Considerations o Fenn 4x 4 1 Camera Dimensions and Mounting The 2K and 4K TDI camera housings are manufactured with high precision Sensor alignment is to the four M4 face mounting holes The 2K and 4K TDI camera housings are equipped with four M4 mounting holes on the front and two M4 mounting holes on one side and on the bottom of the camera N Use caution in the following ways to avoid stripping threads or stressing the case e Use only M4 screws e Do not over torque do not over tighten screws beyond the depth of the holes do not otherwise force screws or create a bending moment with them e Use caution in crafting mounting brackets so that you do not interfere with the lens or exert force on the lens extender tube barrel or torque or otherwise place force on any of the connectors on the back of the case A L mounting bracket section 4 3 is available contact your Fairchild Imaging representative for more details Fairchild Imaging CAM CCD 2KLV TDI amp CAM CCD 4K
25. r temperature is thermally linked near the four M4 mounting holes on the face of the camera Fairchild Imaging recommends mounting the camera using these holes to minimize sensor dark current artifacts N Fairchild Imaging recommends that gain or offset corrections are completed after the camera has been turned on for at least 15 minutes To do offset correction cover the lens with your lens cap Follow this by removing the lens cap to complete a gain calibration Make sure that gain calibration is completed with a uniform light source illuminating the camera Field Of View FOV AN Avoid excess ambient temperatures around the camera PRELIMINARY Camera Hardware Interface 2 1 Installation Overview Before you integrate your camera into your system you should first determine some basic operating parameters such as what resolution you need Do you know the speed of the object that your camera will be inspecting One additional point you want to keep in mind is your lighting requirement Some other major items that you should identify early on in developing your system is the source of your EXSYNC control signal framegrabber custom controller shaft web encoder etc You should also know in advance your sensor resolution and magnification requirements We will use a simple example to reinforce what we just told you in the above Let s say that you have the following system to set up inspect a web 10cm wide moving at 2m s and y
26. sy integration plug compatabile LVDS hookup Full Spectrum of Applications Precision manufacturing inspection Web inspection Sorting and routing Biomedical readout systems Diagnostic systems 1 2 Camera Specification CAM CCD 2KLV TDI 8 CAM CCD 4KLV TDI Performance Specification Calibration Conditions 2048 m 4 Data Rate Strobe 25 460 25 p 5 6 0 5 12 10 10 3 2 Typ 25 m 25 Functions Saturation Output Amplitude Output Gain Mismatch 2 i 5 4 4 2 Pixel Response Non Uniformity Global DN DN gt 09 BPO BID RO GC gt gt AJN NIN OJON e w o NT ine Pet NT DGOe SSS NSS DC Offset Mismatch JON 0 P Random Noise o ON 7 ja Noise Equivalent Exposure pJom 3 yo we 39 19 Respnsvty DN n cm 250 0120 Dynamic Range Raw SHOT 3801 Power Supply Curent VDC m ss o Power Supply Voltage vos 105 Bo ms Operating Temperature 1 O First Pixel Mismatch EN O O O T e I DIN E N N N DN DN N DN W AJO 7 SS EE 7 m Notes DN Digital Numbers also known as levels 0 255 for 8 bit systems 0 4095 for 12 bit systems All measurements taken with camera operating in 96 stage mode All measurements exclude the last pixel of OS 1 and the first pixel of OS4 Tested using v
27. worse case of maximum rotational and horizontal vertical mis positioning can not occur at the same time pes TILT 036 mm 10 mm 0 254 4 6 Illumination In your application you must know the amount and wavelengths of light required Some additional things you want to consider respective to illumination are the characteristics of your light source and the spectral characteristics and speed of the object s being inspected 4 7 Light Sources When selecting and setting up your light source you should be aware of the following e Light sources do age over time e When light sources age they may produce less more light in some areas of the spectrum e Fairchild Imaging cameras work well with either tungsten or solid state LED illumination sources With tungsten sources spectral shaping using a typical BG38 filter is recommended 4 8 Lens Modeling Several camera companies have included this and like information in their manuals For reference material it is very useful The focal point is the point at which the image of an infinitely distant object is brought to focus The effective focal length f is the distance from the second principal point to the second focal point The back focal length BFL is the distance from the image side of the lens surface to the second focal point The object distance OD is the distance from the first principal point to the object front focal point rear focal point r a Pq AAA
Download Pdf Manuals
Related Search