从光电器件对光源的响应率出发,引伸出光电阴极与景物之间的光谱匹配系数表达式,计算了S25光电阴极与暗绿色涂层和绿色草木的光谱匹配系数。S251光电阴极在满月光下,对暗绿色涂层的光谱匹配系数为0.5512,对绿色草木为0.2783;在晴朗星光下,则分别为0.2662和0.1255;对S252光电阴极,前者分别为0.7174和0.6820,后者分别为0.5741和0.4840。计算结果对夜视系统视距估算的修正有较高的参考价值。 Based on the response rate of the optoelectronic device to the light source, the expression of the spectral matching coefficient between the photocathode and the scene is derived, and the spectral matching coefficient of the S25 photocathode, the dark green coating and the green grass is calculated. S251 photocathodes had a spectral matching coefficient of 0.5512 for dark green coating and 0.2783 for green vegetation at full moon, 0.2662 and 0.1255 for clear starlight, 0.7174 and 0.6820 for S252 photocathode respectively, The latter were 0.5741 and 0.4840 respectively. The calculation results have a higher reference value for the correction of line-of-sight estimation of night vision system.