建立了不同损伤状态下光学成像系统的猫眼回波模型, 分析了CCD各层被损伤对猫眼回波功率的影响, 得到猫眼回波功率变化与CCD损伤程度的对应关系, 并通过实验进行了验证.研究发现, 在远场情况下成像光学系统的猫眼回波中心位置光强最强, 且回波功率随CCD损伤程度的加深呈现先显著上升再迅速下降.最后缓慢下降的变化规律, 可由此判断CCD各层结构的损伤状态.研究结果对远场条件下CCD被损伤程度的实时监测有一定的参考价值.

The cat′s eye echoes model of the optical imaging system under different damage conditions was established and the influence of the damage to the charge coupled device layers on the cat′s eye echo power was analyzed. Based on this, the corresponding relationship between the echo power of the cat's eye and the damage degree of the CCD was established and verified by experiments. The results show that the field intensity is the strongest in the center of cat′s eye echo which is from imaging optics system, and the power of the echo increases dramatically and then decrease steeply and decrease slowly with the damage degree more serious. The damaged status of CCD can be judged according to this rule. The study results have certain reference value for monitoring the damage degree of CCD in real time in the far field.