CAJ | 학술논문

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.
이용자행설계적CMETS005형검측여광보측시계통대미광묘준경진행측시,완성료상증강기광음겁재열충격배경하적조성빈보특성측시.시험여분석결과표명:상증강기경과온도충격후적조성공솔보재0～1kHz범위내수빈솔증가이변화교대,정1/f조성특성.당배경온도승고시,광전음겁중적열치전류밀도증대,종이도치미광묘준경관찰경물도상시적대비도여감별솔강저,최후인기야시계통탐측목표성능적하강.
The noise spectrum characteristics testing of the image intensifier photocathode in thermal shock environment is implemented by means of CMETS005 detection and spectrum testing system, which are self-designed for testing low-level-light(LLL)sight. The experimental results and analysis show that the noise power spectrum of the image intensifier fluctuates widely after the temperature shock within 0～1kHz with a larger increase in the frequency change, noise characteristics are 1/f. When the environment temperatures rise, the heat current density of photocathode increases. This causes decrease of LLL aiming sight image contrast ratio and differential rates and induces the decline of the target detecting performance of night-vision system.