建立了猫眼回波探测成像光学系统损伤程度的实验系统, 得到激光损伤CCD时猫眼回波峰值功率随辐照时间的变化曲线, 分析了回波峰值功率的变化机理, 并据此建立回波峰值功率变化与CCD损伤程度之间的联系.研究表明, 受CCD不同损伤区域的反射率及粗糙度差异的影响, 猫眼回波峰值功率随CCD损伤程度的加深呈现先显著上升再迅速下降的变化规律, 实际应用时可通过探测CCD猫眼回波强度的变化,再依据此规律来推断CCD各层结构的损伤状态.

An experimental system for detecting the damage degree of the imaging optical system by using the cat′s eye echo is established, and the peak power of the cat′s eye echo with the irradiation time is summarized. The change mechanism of peak power of cat′s eye echo is analyzed. The relationship between the peak power of the echo and the damage degree of the CCD is established accordingly. Due to the influence of the reflectance and roughness of the CCD in different damage areas, the research shows that the peak power of the cat′s eyes echoes increase dramatically, then decrease significantly with the increase of the damage degree of the CCD. In practical application, it is possible to judge the damage state of the CCD structure according to this rule by detecting the change of the echo strength of the CCD cat's eye.