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首页> 外文会议>Electro-Optical and Infrared Systems: Technology and Applications IV; Proceedings of SPIE-The International Society for Optical Engineering; vol.6737 >Uniform calibration of night vision goggles and test sets
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Uniform calibration of night vision goggles and test sets

机译：夜视镜和测试仪的统一校准

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摘要

There are orders of magnitude differences between the ～0.1 % (k=2) uncertainty of NIST reference detector calibrations and the uncertainty of night vision (NV) goggle measurements. NIST developed a night vision radiometer calibration facility and NV radiometer transfer standards. The transfer standards, that propagate the radiance responsivity scale to the military primary standards laboratories, are calibrated against a NIST reference radiometer. The reference radiometer has been calibrated on the NIST Spectral Comparator Facility (SCF) for spectral power and irradiance responsivities. Spectral considerations are discussed to lower the uncertainties of the radiance responsivity scale transfer to the test sets and then to the goggles. Since direct determination of the final uncertainties in goggle calibrations and measurements is difficult, models have been made to estimate the most important uncertainty components based on individual spectral measurements of the source distributions and radiometer spectral responsivities. It is also shown, that because of source spectral mismatch problems, the goggle measurement uncertainty at applications can be much higher than at calibration. A suggestion is being made to mimic the no-moon (stars only) night sky radiation distribution using several LEDs in the test-sets to decrease the large spectral mismatch errors. A broad-band correction factor has been developed to further decrease calibration uncertainty when the goggles to be used have different spectral responsivities than the standard. Geometrical considerations to optimize the radiance measurement angle and the out-of-target blocking are also discussed to decrease the uncertainty in the radiance responsivity transfer.
机译：NIST参考检测器校准的〜0.1％（k = 2）不确定度与夜视（NV）护目镜测量的不确定度之间存在数量级差异。 NIST开发了夜视辐射计校准设施和NV辐射计传输标准。将辐射响应度标度传播到军事主要标准实验室的传输标准是根据NIST参考辐射计进行校准的。参考辐射计已在NIST光谱比较器设施（SCF）上针对光谱功率和辐照度进行了校准。讨论了光谱考虑因素，以降低辐射响应度标度转移到测试仪然后转移到护目镜的不确定性。由于很难直接确定护目镜校准和测量中的最终不确定性，因此已经建立了模型来根据源分布和辐射计光谱响应的各个光谱测量来估计最重要的不确定性分量。还表明，由于源光谱不匹配问题，护目镜的测量不确定性在应用中可能比在校准时要高得多。有人建议在测试集中使用几个LED来模拟无月球（仅限星星）的夜空辐射分布，以减少较大的光谱失配误差。当所使用的护目镜的光谱响应与标准光谱响应不同时，已开发出宽带校正因子以进一步降低校准不确定性。还讨论了优化辐射测量角度和超出目标范围的几何考虑，以减少辐射响应度传递中的不确定性。

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