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Alpha NIR User’s Guide   412-0007-10  Ver 150 

 

 

INDIGO OPERATIONS 

3.2.9. 

Open “IRvista” on PC desktop.  Go to “Setup” menu, then pull down to 
“Preferences”.   Name the file in the “File path for camera settings” box.  
Select “Apply and Save Preferences”.  Select “Change”. 

3.2.10. 

Select “Camera” at the top tool bar. 

3.2.11. 

Select “Camera Control” at the top tool bar. 

3.2.12. 

Select “Skimming on” or “Skimming off.”  

3.2.13. 

Select “Low Gain” mode or “High Gain” mode. 

3.2.14. 

Set “Integration Time” in microseconds (i.e. 16 msec is 16000 usec) 

3.2.15. 

Set VDetCom to the minimum voltage for the integration time using the 
“Camera Control” selection under the “Camera” menu on the upper tool bar.  

 

 

IMPORTANT NOTE:  If the NUC looks bad because it appears that a large 

 

area of pixels are not turned on, try a higher VDetCom voltage. 

 

INTEGRATION 

TIME 

  MINIMUM 

VDETCOM 

VOLTAGE 

 

33.2 msec 

lens on, f/ 1.4, skimming on   

Low Gain 

4.70V 

16 msec 

lens on, f/ 1.4, skimming on   

Low Gain  

4.70V 

500 usec 

no lens, skimming on   

 

Low Gain  

4.75V 

100 usec 

no lens, skimming on   

 

Low Gain  

4.80V 

25 usec 

no lens, skimming on   

 

Low Gain  

5.0V 

*5 usec 

no lens, skimming off  

 

Low Gain  

5.1V 

16 msec  

lens on, f /1.4, skimming off   

High Gain 

4.70V 

33.2 msec  

lens on, f /1.4, skimming off   

High Gain 

4.70V 

100 msec  

lens on, f /1.4, skimming off   

High Gain 

4.70V 

200 msec  

lens on, f /1.4, skimming off   

High Gain 

4.70V 

500 msec  

lens on, f /1.4, skimming off   

High Gain 

4.70V 

*Note integration times shorter than 25 usec may need a brighter light    
source. 

3.2.16. 

Select “Camera” at the upper tool bar. 

3.2.17. 

Select “Calibrate Camera”. 

3.2.18. 

Or select “Generate New NUC and BPR tables” icon on top tool bar. Icon 
has camera with arrow on it.  

3.2.19. 

Create a camera folder. 

3.2.20. 

Create an integration time folder. Highlight the new folder. 

 

17 

Summary of Contents for Alpha Nir

Page 1: ...INDIGO OPERATIONS A Al lp ph ha a N NI IR R D Di ig gi it ta al l I Im ma ag ge e A Ac cq qu ui is si it ti io on n S Sy ys st te em m User s Guide Version 150 412 0007 10...

Page 2: ...ver including without limitation damages for loss of business profits business interruption loss of business information or other loss arising out of the use of or inability to use the Alpha NIR camer...

Page 3: ...RDWARE 8 1 3 ALPHA NIR SYSTEM HARDWARE SETUP 10 2 ALPHA NIR EXTERNAL SYNC OPERATION 12 2 1 PROCEDURE FOR ACTIVATING EXTERNAL SYNC WITH IRVISTA 12 3 ALPHA NIR CALIBRATION LIGHT SOURCE NUC PROCEDURE 16...

Page 4: ...is a precision optical instrument and should be protected from shock and vibration Keep the camera stored in the manufacturer s shipping container This camera contains static sensitive electronics and...

Page 5: ...vidicon cameras InGaAs sensors are highly resistant to damage from intense laser beams and do not suffer from image retention making microsecond level exposure times achievable The ability to control...

Page 6: ...of delivering Advanced users can design their own interface to Alpha NIR using their own digital frame grabber and camera control software They need only purchase the sensor head from Indigo Systems C...

Page 7: ...l files in the DLL patch folder and paste them in the folder called Indigo Data which is located at C Program Files IRvista Indigo Data When the confirm file replacement window pops up hit the Yes to...

Page 8: ...drop frames it should always say that the number of frames acquired matches the number of buffers frames received by the IMAQ card 16 Next try recording images direct to disc Save the images to a bin...

Page 9: ...2 frame grabber board 10 NI IMAQ Version 2 5 1 CD and documentation 11 IMAQ cable assembly for Alpha NIR 12 Carrying case Available optional accessories 1 Lens 25mm 50mm Zoom 2 Computer System 3 LabVI...

Page 10: ...r to use the proper camera driver 12 To confirm everything is working properly at this point click grab This should result in display of a dark box in the center of the window this is the output of th...

Page 11: ...laboratory 5 s and 100 s for laser beam or high intensity applications and 500 msec high gain for very low light imaging Click make new default settings to insure the system reboots to the new settin...

Page 12: ...ected live digital video image displayed at about 10 frames per second Note The Factory Test Interface Connector is generally for factory use Please do not attempt to communicate through the camera us...

Page 13: ...Mode integration and digital data output is initiated by the ext_sync input pin A rising edge on the ext_sync pin will cause the camera to begin integration within a 33 46ms frame and begin to output...

Page 14: ...TWID TWID Minimum width of pulse 100ns TPER Minimum period of ext_sync 33460 s TWID Normal Mode Timing TEND Delay from Rising edge of Ext Sync to End of Integration 822076 8 5 clocks 33492 3 7us TSTAR...

Page 15: ...Alpha NIR User s Guide 412 0007 10 Ver 150 INDIGO OPERATIONS 14...

Page 16: ...ur re e e 1 1 1 r S A Al lp ph ha a N NI IR R C Ca al li ib br ra at ti io on n L Li ig gh ht t S So ou ur rc ce e N NU UC C P Pr ro oc ce ed du ur re e N N NI I IR R R C C Ca a al lli iib b br r ra a...

Page 17: ...re made constantly We tend to perform generic corrections with the aperture wide open and the focus set to infinity One can perform a one point correction one the lens is set properly to minimize spat...

Page 18: ...gher VDetCom voltage INTEGRATION TIME MINIMUM VDETCOM VOLTAGE 33 2 msec lens on f 1 4 skimming on Low Gain 4 70V 16 msec lens on f 1 4 skimming on Low Gain 4 70V 500 usec no lens skimming on Low Gain...

Page 19: ...nsity adjust the lamp voltage until the mean value is about 950 counts above the light off mean count value Push the GO button when the light box has stabilized at the desired mean count value 3 2 27...

Page 20: ...VDETCOM VOLTAGE 33 2 msec lens on f 1 4 skimming on Low Gain 4 70V 16 msec lens on f 1 4 skimming on Low Gain 4 70V 500 usec no lens skimming on Low Gain 4 75V 100 usec no lens skimming on Low Gain 4...

Page 21: ...ght off mean count value At 25 usec and with the lamp voltage at 12V maximum the counts may not reach 950 counts above the light off mean count value A NUC can still be performed using a lower count v...

Page 22: ...he seconds and converts them into readable strings The Binary Date Stamp is defined as such First take seconds from 12 00 am Jan 1 1904 Universal time This is a real number with seconds accurate to 1...

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