摘要
为了降低光谱仪的偏振敏感度,提出了一种在会聚光路中设计退偏器的方法。该方法首先将系统的望远镜和准直镜视为辅助光路,使得光束的偏振状态可以用Stocks矢量来表示;然后使用Mueller矩阵来表示元件的偏振特性,并推导出了基于Mueller矩阵的系统偏振敏感度模型;最后利用多重多元回归分析来提升Mueller矩阵的计算速度与精度。基于该方法设计了一款放置在会聚光路中的改进型退偏器,系统的偏振敏感度小于1%,像点分裂距离小于8μm,该结果满足设计要求,验证了该方法在会聚光路中设计退偏器的有效性。
In order to reduce the polarization sensitivity of a spectrometer,a method of designing a depolarizer in convergent optical path is proposed.In this method,the telescope and collimator of the system are regarded as auxiliary optical paths,so that the polarization state of the beam can be expressed by Stocks vectors;then the polarization characteristic of the element is represented by Mueller matrix,and the polarization sensitivity model of the system based on Mueller matrix is derived;finally,multiple regression analysis is used to improve the calculation speed and accuracy of Mueller matrix.Based on this method,an improved depolarizer placed in the convergent optical path is designed.The polarization sensitivity of the system is less than 1%,and the image point splitting distance is less than 8μm.The results meet the design requirements and verify the effectiveness of the method for designing the depolarizer in the convergent optical path.
作者
武志昆
石恩涛
王咏梅
郭宝泽
李鹏达
Wu Zhikun;Shi Entao;Wang Yongmei;Guo Baoze;Li Pengda(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Key Laboratory of Space Environment Exploration,Beijing 100190,China;Key Laboratory of Science and Technology on Space Environmental Situation Awareness,Chinese Academy of Sciences,Beijiiig 100190,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2022年第10期45-52,共8页
Acta Optica Sinica
基金
中国科学院空间科学战略性先导科技专项(XDA1535010204)
国家重大项目风云三号气象卫星。
关键词
测量
光谱仪
偏振敏感度
会聚光路
退偏器
measurements
spectrometer
polarization sensitivity
converging optical path
depolarizer
