lighting, aircraft, night vision imaging system - General Dynamics ...

MIL-STD-3009
APPENDIX A
Lamp Output Spectroradiometer Output
0.1N 0.1R ±0.01R
0.5N 0.5R ±0.01R
5N 5.0R ± 0.2R
10N 10R ± 0.2R
50N 50R ± 2.0R
100N 100R ± 2.0R
500N 500R ± 20R
1000N 1000R ± 20R
5000N 5000R ± 200R
10000N 10000R ± 200R
A.3.7 Signal conditioning.
Controls shall be provided to permit the operator to improve or change the signal-tonoise
ratio of a measurement.
A.3.8 Stray light.
Stray light within the spectroradiometer shall not adversely affect the accuracy of the
spectroradiometer when tested in accordance with the procedures herein.
A.3.8.1 Stray light verification.
Stray light accuracy shall be verified within a six-month period prior to taking a
measurement. Stray light accuracy shall be verified by measuring the spectral radiance
of a NIST traceable standard of spectral radiance, which is filtered by a filter with known
transmission that is NIST traceable. The measurement shall be made from 380 to 930
nm in 5 nm increments. The transmission of the filter shall be greater than 50% from
380 to 500 nm and less than 0.2% from 690 to 930 nm (see A.6.1). For the
spectroradiometer to pass the stray light test, the measured value of spectral radiance
at each wavelength shall be within 5% of the value calculated by multiplying the output
of the standard lamp by the transmission of the filter. The stray light shall be checked
for each configuration of optics that is used during the testing.
A.3.9 Spectroradiometer optics.
If the spectroradiometer is used for luminance measurements, the optics shall be
capable of allowing measurements of spot sizes down to 0.18 mm (0.007 inch) with a
full-scale sensitivity of 3.43 cd/m 2 (1.0 fL).
A.3.10 Spectroradiometer viewing system.
The viewing system shall be capable of locating the spot to be measured with a
maximum error of 5% of the diameter of the spot to be measured.
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