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Alpha NIR User's Guide 412-0007-10 Ver 150
3 Alpha™ NIR Calibration Light Source NUC Procedure
3.1 RECOMMENDED EQUIPMENT & SOFTWARE
3.1.1.
National Instrument Framer Grabber (P/N 216-0001-03)
3.1.2.
IRvista software (321-0028-00) and Indigo Alpha NIR Camera Interface
software (110-0064)
3.1.3.
0 to 12V Adjustable DC Power Supply for Light Source.
3.1.4.
Indigo Adjustable Light Source Box
3.1.5.
Lens tissue and lens cleaner solution
3.1.6.
Black cloth for blocking ambient room light
3.2 PROCEDURE
3.2.1.
Verify that the FPA window is very clean.
3.2.2.
Set up the light box against the front of the camera lens, or the front of the
camera itself. If a lens is used, it is best to set the lens aperture and focus to
the desired values before performing the non-uniformity correction. In
actual practice, aperture and focus adjustments are 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 spatial non-uniformity.
3.2.3.
Set the power supply to 0 VDC for the light box. WARNING: The lamp
inside the light box is rated for a maximum drive voltage of 12 VDC. Set
power supply voltage to 0 VDC before connecting power cable to light box.
Verify that the power supply is set to voltage readout and not amps readout.
3.2.4.
Mount lens on camera and open the lens aperture to wide open (f /1.4).
Focus the lens to infinity.
3.2.5.
Attach Digital Interface cable to camera.
3.2.6.
Raise height of camera lens to center it to the light box. The camera lens
should be pushed against the light box's diffusion filter.
3.2.7.
Power up the camera (6 VDC) and open "IRvista.exe" on PC desktop. If
IRvista does not open, check that the "File Path for Camera Settings"
window shows NOFILE in capital letters.
3.2.8.
Place the black cloth over the camera and light box.
16
INDIGO OPERATIONS
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