Research on Effects of Natural Factors in Battlefield on Microlight Detecting Distance

The range of microlight detection is limited that restricts the combat effectiveness. In the paper, we have explained the basic principle of low-light-level night vision equipment. We have analyzed the influences of the spectral distribution curve of night sky light, the anti-radiation spectra of typical night vision and background and calculated atmospheric scattering. In order to improve the detection distance of low-light-level night vision system, we have put forward three measures. The first is to select different types of photocathodes by demand to make full use of the spectral characteristics of the night sky light. The second is to make full use of the band 1.0μm. The third is the effect of atmospheric scattering must be amended.