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。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4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。

The polarization spectral intensity modulation (PSIM) is an advanced polarization spectral measurement technology, and the measured data processing is the key link of PSIM to resolve the polorization spectrum information. The mathematics principle was presented on how 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, so 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.