论文部分内容阅读
利用自行设计的CMETS005型检测与光谱测试系统对微光瞄准镜进行测试,完成了像增强器光阴极在热冲击环境下的噪声频谱特性测试。试验与分析结果表明:像增强器经过温度冲击后的噪声功率谱在0~1kHz范围内随频率增加而变化较大,呈1/f噪声特性。当环境温度升高时,光电阴极中的热致电流密度增大,从而导致微光瞄准镜观察景物图像时的对比度与鉴别率降低,最后引起夜视系统探测目标性能的下降。
The self-designed CMETS005-based detection and spectroscopy system was used to test the glimmer sight, and the noise spectral characteristics of the photo-cathode of the image intensifier under thermal shock were tested. The results of experiment and analysis show that the noise power spectrum of the image intensifier changed greatly with the increase of frequency in the range of 0 ~ 1 kHz with a 1 / f noise characteristic. When the ambient temperature increases, the photocurrent in the photocathode increases, which leads to the decrease of the contrast ratio and the discrimination rate of the gazing sight when observing the scene image. Finally, the performance of the night vision system to detect the target decreases.