R-C系统的遮光罩设计与仿真  

Baffle Design and Simulation of R-C System

作　　者：李婷[1] 杨建峰[1] 阮萍[1] 马臻[1] 

机构地区：[1]中国科学院西安光学精密机械研究所

出　　处：《光子学报》2008年第2期332-336,共5页Acta Photonica Sinica

摘　　要：针对R-C系统的特点,考虑轴外渐晕的影响,推导出主、次镜内遮光罩尺寸设计的约束公式.讨论了次镜内遮光罩上挡光环的设计方法和位置计算公式,并给出外遮光罩的设计方法.对某R-C望远镜系统进行了遮光罩设计,并用光学软件进行杂散光分析,计算得到方位角分别为0°、45°、90°时的PST曲线.结果表明,当离轴角度大于太阳临界入射角时,PST值小于10-10量级,满足系统要求.The constraint formulas for designing the geometries of primary baffle and secondary baffle are deduced when taking account of vignette of R-C system. Both the design method of vanes on secondary baffle and the formulas for calculating their dimensions are discussed. Meanwhile the design method of outer baffle is given. The method is used to design a baffle for some R-C telescope system, and the true stray light conditi＇on is simulated with optical ray trace software. According to the simulated datum, the PST curves at aztmuth 0°,45°and 90°are drawn, and these curves show that PST values are less than 10^-10 when off-axis angre is larger than the solar critical angle which satisfies the requirement of the system.

关 键 词：R—C系统 渐晕 遮光罩设计 挡光环 PST曲线 

分 类 号：O439[机械工程—光学工程]