胡劲松 宋志平

摘 要：偏振光谱强度调制（PSIM）是一种获取偏振光谱信息的新技术，测量数据处理是PSIM偏振光谱仪的关键模块之一。利用IDL程序设计语言，完成PSIM偏振光谱仪测量数据处理算法的集成设计。从PSIM技术原理出发，进行PSIM偏振光谱仪测量数据处理算法的数学推导，确立PSIM偏振光谱仪数据处理算法流程，编程实现了从光谱仪测量数据文件读入到待测光Stokes矢量元素谱及偏振度谱输出的完整过程，完成了PSIM偏振光谱仪数据处理算法的可视化设计，使其具有良好的用户界面。典型待测光源测量实验数据处理结果与理论分析结果的一致性证明了算法可行性和软件设计的正确性。同时，程序功能的可视化设计也使PSIM偏振光谱仪测量数据处理效率明显提升。

关键词：偏振光谱仪;数据处理;IDL编程语言;软件设计

DOI：10. 11907/rjdk. 182753

中图分类号：TP312文献标识码：A文章编号：1672-7800（2019）001-0069-04

Abstract： Polarization spectral intensity modulation（PSIM） is a new technology for obtaining polarization spectral information and its measurement data processing is one of the key modules of  spectropolarimeter. The measurement data processing algorithms integrated design of spectropolarimeter based on polarization spectral intensity modulation （PSIM） technology has been completed by using an Interactive Data Language. Based on PSIM technology principle， the detail mathematical deduction for the spectropolarimeter measurement data processing algorithm was presented， the data processing algorithm process of the spectropolarimeter was established， and the whole procedure of reading data from the spectropolarimeter， data processing and outputting the results was realized by writing a software. The consistency between the experimental data processing results of the typical photometric sources and the theoretical analysis results show that the paper work is successful. Firstly， the visual design of the data processing algorithm of the spectropolarimeter is realized and it has a good user interface. Secondly， the correctness of the software design is verified by the coincidence between the results of the experimental data with the theoretical analysis results. Finally， the processing efficiency of the measurement data of the spectropolarimeter is improved significantly for the visual function designation.

0 引言

由于在天文觀测、生物医学、大气遥感监测、军事等领域皆具有独特的应用优势，近年来光的偏振态测量成为相关领域研究热点[1-5]。光的偏振状态可用Stokes矢量完整描述。来自目标反射光、辐射光的Stokes矢量元素谱含有与目标本征特性相关的信息。偏振光谱仪通过测量目标反射光、部分辐射光或完整的Stokes矢量元素谱信号，实现对目标相关特性参数的反演。偏振光谱强度调制（Polarization Spectral Intensity Modulation，PSIM）是实现目标4个Stokes矢量元素谱同步测量的先进技术。与常规偏振光谱仪相比，基于该技术的偏振光谱仪结构简单紧凑，无转动部件，探测器只需一次曝光，结合相关解析算法，即可从测量结果中解调得到待测光完整的Stokes矢量元素谱数据。……