摘要
对空间离轴反射式CCD相机的杂散光情况进行分析,通过对CCD的照度图进行分解,对占CCD照度图能量较大的杂散光光路进行解析,确定杂散光路径。根据仿真结果,针对两个成像通道提出杂散光抑制措施并对抑制措施进行优化设计。经过再次仿真,两个成像通道杂散光系数得到大幅降低。根据相机观测对象,利用点源透过率(PST)作为检验杂散光抑制措施有效性的指标。当离轴角为30°,相机的PST达到10-8数量级,满足设计指标要求。
The stray light from a space off-axis reflective CCD camera is analyzed.The irradiance images of CCD are obtained and decomposed.The path of stray light which occupies more energy of irradiance images is determined.According to the results of optical simulation,stray light suppression measures for two imaging channels are proposed and optimized.After re-simulation,the veiling glare indexes of the two imaging channels are greatly reduced.According to the observation object of the camera,the point source transmission(PST)is used to test the effectiveness of stray light suppression measures.When the off-axis angle is 30°,the PST of the camera reaches the order of 10-8,which meets the design requirements.
作者
李可
王媛媛
常君磊
李庆林
张楠
张庭成
姚林
Li Ke;Wang Yuanyuan;Chang Junlei;Li Qinglin;Zhang Nan;Zhang Tingcheng;Yao Lin(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2020年第3期241-246,共6页
Laser & Optoelectronics Progress
关键词
散射
杂散光抑制
双向反射分布函数
杂散光系数
点源透过率
scattering
stray light suppression
bidirectional reflection distribution function
veiling glare index
point source transmittance
