中文摘要：

分析星敏感器在轨所受到的杂光的特点,对星敏感器常用的遮光罩结构进行分析和对比说明.给出一种结构简单、体积和重量较小的一级遮光罩,使用Trace Pro对其杂光抑制性能进行分析,给出其PST曲线及30°太阳入射角时的杂光在像面上的照度分布图.对该遮光罩进行了杂光实验,给出像面上A、B、C三区的杂光均值随太阳入射角的变化曲线.仿真分析结果与实验结果表明该遮光罩杂光抑制能力较好,可以满足星敏感器的杂光抑制要求.

英文摘要：

The characteristic of the stray light is analyzed. An improved baffle with four angled vanes is given. The configuration of the baffle is simple and its weight is light. The Trace Pro software is used to analyze the light-shielding ability. The PST curve is analyzed. The stray light distribution on the detector when the sun is at 30 degree is given to illuminate the stray-light uniformity. The results of stray-light experiment are given and the curves of the average intensity on the detector＇s three regions are analyzed.The simulated result and the experimental result show that the light-shielding ability of the improved baffle is good and can meet the light-shielding requirement of the star sensor.