J4 ›› 2016, Vol. 33 ›› Issue (2): 249-256.

• 激光应用 • 上一篇    

基于PSIM技术的偏振光谱仪测量数据处理方法

宋志平1,张明辉2,洪津3   

  1. 1. 安徽大学 物理与材料科学学院,安徽 合肥 230601; 2. 中国科学院安徽光学精密机械研究所,安徽 合肥 230031
  • 收稿日期:2015-12-04 修回日期:2015-12-09 出版日期:2016-03-28 发布日期:2016-03-28
  • 通讯作者: 宋志平(1967—)博士,副教授,主要研究方向为偏振光谱测量技术及应用 E-mail:zpsong@aiofm.ac.cn

Measured Data Processing Method of Spectropolarimeter Based on PSIM Technology

SONG Zhiping, ZHANG Minghui, HONG Jin   

  1. 1. School of Physics & Material Science, Anhui University, Hefei 230601,China; 2. Anhui institute of optical precision machinery, Chinese academy of sciences, Hefei 230031, China
  • Received:2015-12-04 Revised:2015-12-09 Published:2016-03-28 Online:2016-03-28

摘要: 偏振光谱强度调制(PSIM)是一种先进的偏振光谱测量技术,测量数据处理是PSIM偏振光谱仪解析待测光偏振光谱信息的关键环节。论文从PSIM技术的调制、解调机理出发,结合相关数字信号处理理论,给出了从PSIM偏振光谱仪系统的测量数据中,解析待测光四个Stokes矢量元素谱的数学原理,建立了PSIM偏振光谱仪的测量数据处理流程。搭建了PSIM偏振光谱仪实验装置,分别对平行光管直接输出光信号及平行光管加透光轴水平方向偏振片后输出的光信号进行了测量实验。利用建立的PSIM偏振光谱仪测量数据处理流程,对实验装置的测量数据进行了偏振光谱信息解析处理,处理结果与理论分析结果间良好的一致性,验证了PSIM偏振光谱仪系统数据处理方法的正确性。

关键词: 遥感;数据处理方法;变换域处理;偏振光谱仪

Abstract: The polarization spectral intensity modulation (PSIM) is an advanced polarization spectral measurement technique, and it is a key step how the polarization spectral information of light under testing (LUT) is extracted from the measured data of spectropolarimeter based on PSIM by the data processing algorithm. The mathematics principle was presented on how the all elements of Stokes vector spectrum of LUT are extracted from the measured data of PSIM system, starting from the modulation mechanism of PSIM technology, combined with relevant theory of digital signal processing (DSP), and the procedure of measured data processing for PSIM spectropolarimeter system was established. The spectropolarimeter experimental device based on PSIM was set up, and the measurement experiment was carried out that the light from the parallel light pipe directly and the polarized parallel light pipe output by polarizer were measured respectively. The measured data of the experimental device was processed according to the data processing procedure established previously to extract the spectropolarimetric information from it. The good consistency between the results of theoretical analysis and that of data processing verifies the method of data processing of spectropolarimeter based PSIM is correct.

Key words: Remote sensing; Data processing methods; Transform domain signal processing; Spectropolarimeter