一种新型空间相机遮光罩的设计与仿真  

Design and Simulation of the Baffle of a New Type Space Camera

作　　者：李芸[1] 相里斌[2] 李立波[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]中国科学院光电研究院,北京100080

出　　处：《光电工程》2010年第7期41-44,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金(40805013);国家重点基础研究发展计划(2009CB724005)

摘　　要：本文所分析的空间相机视场角比较大,引进的杂散光较难消除,故对遮光罩的设计提出了挑战。本文以点源透射比作为评价方法,以空间相机探测到的目标亮度为标准,计算出相机需要达到的杂散光抑制指标。以此指标为基础,根据空间相机自身的特性及遮光罩设计原则,设计出一个三段式二级遮光罩。在光学软件TracePro中对加上遮光罩的相机系统进行建模和仿真,由得出的点源透射比曲线证明设计的遮光罩能成功地抑制杂散光,可以满足空间相机的使用要求。Because of the space camera＇s large Field of View（FOV）,stray light is more difficult to eliminate.Therefore,it is difficult to design the baffle.Through the Point Source Transmittance（PST）,the suppression indicators of the camera＇s stray light are calculated by the standard of the target brightness which is detected by the space camera.Based on the suppression indicators,according to the features of space camera and the hood design principles,a two-class shield was designed.The whole space camera was emulated in the TracePro.It is proved that the design of the shield can successfully suppress stray light and meet the requirements of the space camera through the derived point source transmittance curve.

关 键 词：空间相机 杂散光 二级遮光罩 点源透射比 

分 类 号：O435[机械工程—光学工程] TH751[理学—光学]