R-C系统消杂散光设计与效果评估  

Design and estimation of suppressing stray light in R-C system

作　　者：高郭鹏[1,2] 熊望娥[1] 甘玉泉[1,2] 刘阳[1,2] 

机构地区：[1]中国科学院西安光学精密机械研究所,陕西西安710119 [2]中国科学院研究生院,北京100039

出　　处：《光学仪器》2009年第5期36-41,共6页Optical Instruments

基　　金：国家自然科学基金资助项目(60532070)

摘　　要：研究R-C系统的消杂散光以提高其成像质量。从杂散光的能量传输方程出发,分析总结了杂散光消除的基本途径。按照R-C系统杂散光消除的具体要求,结合作图法,推导出初始中心遮光比确定时的内遮光罩顶点坐标公式;为了减小初始中心遮光比,将次镜锥状遮光罩改进为百叶窗式结构。设计了杂散光源抑制角已知时的外遮光罩。最后,给出在Tracepro中利用仿真模拟测定杂光系数的方法及R-C系统遮光罩的应用实例。Suppressing stray light in R-C system is discussed to improve its image quality. From energy transfer equation of stray light, basic methods of suppressing stray light are analyzed and summarized. According to requirement of suppressing stray light in R-C system, vertex coordinate formulas of inner baffle are deduced based on graphing method in the case of certain obscuration; in order to reduce the obscuration, conical baffle of secondary mirror is ameliorated into a shutter one. Outer baffle is designed when angle of stray light suppressing is foregone. Finally, a way of mensurating veiling glare index using simulation in Tracepro and a baffle example in R-C system are given.

关 键 词：R-C系统 杂散光 BRDF 遮光罩 挡光环 杂光系数 TRACEPRO 

分 类 号：O439[机械工程—光学工程]