机载小型化星敏感器遮光罩设计  

Design of baffle of airborne miniature star sensor

作　　者：胡晓东[1] 胡强[1] 雷兴[1] 魏青[1] 刘元正[1] 王继良[1] 

机构地区：[1]中国航空工业集团公司 西安飞行自动控制研究所,陕西西安710065

出　　处：《传感器与微系统》2014年第6期65-68,共4页Transducer and Microsystem Technologies

基　　金：航空科学基金资助项目(61901060301)

摘　　要：针对机载小型化星敏感器的消杂光系统进行了研究。以点源透射比(PST)为标准,根据机载小型化星敏感器成像系统自身的特性与遮光罩设计原则,在尽量不增加系统长度的前提下,对消杂光结构进行了设计。利用Matlab计算出遮光罩的尺寸,确定挡光环的位置,结合CAD作图软件进行建模,并使用光学软件TracePro对遮光罩的消杂光效果进行了仿真和分析,在太阳规避角30°时的点源透射比达到了5.536×10-10,达到系统要求的性能指标。设计的遮光罩能够成功地抑制杂散光,可以满足机载小型化星敏感器的使用要求。Aiming at stray light suppression system of airborne miniature star sensor, study is carried out. Using point source transmittance （PST） as standard, according to specialty of airborne miniature star sensor imaging system and baffle design principles, under the premise of trying not to increase system length, stray light suppression mechanism is designed. The baffle size and vane position are calculated by Matlab program and model is built by CAD software. The mechanism is then emulated in TracePro. The result demonstrates that the point source transmittance is 5.536×10^-10 ,when the sun avoid angle is 30°. It is proved that the designed baffle can successfully suppress stray light and meet requirements of airborne miniature star sensor.

关 键 词：星敏感器 杂散光 遮光罩 挡光环 点源透射比 

分 类 号：O439[机械工程—光学工程]