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在ICCD摄像机上加装一个半导体制冷器,对像增强器进行实时降温处理,以降低系统时空域噪声。为了评价半导体制冷器对ICCD系统噪声的影响,运用三维噪声模型对制冷前后系统的时空域噪声和信噪比进行了分析,发现半导体制冷器能够有效地降低像管的噪声。
ICCD camera installed in a semiconductor cooler, the image intensifier real-time cooling to reduce the system time domain noise. In order to evaluate the influence of the semiconductor refrigerator on the ICCD system noise, the three-dimensional noise model is used to analyze the space-time noise and signal-to-noise ratio of the system before and after refrigeration. It is found that the semiconductor refrigerator can effectively reduce the noise of the image tube.