用于星敏感器的马蹄形卡塞格伦反射式光学系统杂散光抑制方法（英文）

发布时间：2018-06-02 18:59

本文选题：天文导航 + 星敏感器　；参考：《中国惯性技术学报》2016年02期

【摘要】：星敏感器是惯性天文组合导航系统的关键传感器,星敏感器的光学系统设计及对杂散光的抑制是决定其能否实现测星的主要因素。提出一种改进型的卡塞格伦反射光学系统,该系统通过摆镜折叠光路并实现扫描,压缩了系统的体积,增强了系统的灵活性。进而针对该系统设计了一种基于基生叶结构的遮光罩,利用光线追迹软件在不同方位和俯仰角度入射下对系统进行了仿真分析,结果表明规避角以外的点源透射比可以达到10?9以下,满足系统使用要求。此外,鉴于传统点源透射比方法的计算量较大,还引入了杂散光系数的概念,通过对镜像系统进行反向光线追迹可以将杂散光分离,从而计算出杂散光系数,表征系统对杂散光的抑制能力。该方法可降低计算量,提高设计效率。
[Abstract]:Star sensor is the key sensor of inertial astronomical integrated navigation system. The design of optical system of star sensor and the suppression of stray light are the main factors to determine whether the satellite sensor can be used to measure stars. An improved Cassegrain reflective optical system is proposed. The system compacts the volume of the system and enhances the flexibility of the system by folding the optical path of the pendulum and scanning it. Then, a kind of shade based on the basic leaf structure is designed, and the system is simulated and analyzed by the ray tracing software under different angles of azimuth and pitch. The results show that the point source transmittance beyond the circumvention angle can reach below 10 ~ 9, which meets the requirements of the system. In addition, in view of the large amount of calculation of the traditional point source transmittance method, the concept of stray light coefficient is also introduced. The stray light can be separated by tracing the mirror system in reverse light, and the stray light coefficient can be calculated. To characterize the ability of the system to suppress stray light. This method can reduce the calculation cost and improve the design efficiency.
【作者单位】：中国航空工业集团西安飞行自动控制研究所;
【基金】：航空基金支撑项目(61901060301)
【分类号】：P128.4

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