空间调制全偏振成像系统带宽影响分析  

Analysis of the effect of bandwidth on spatially modulated full polarization imaging system

作　　者：叶松[1,2] 郝平波 汪杰君 李树[1,2] 王新强 张玉婷[1] 王方原 张文涛[1,2] YE Song;HAO Pingbo;WANG Jiejun;LI Shu;WANG Xinqiang;ZHANG Yuting;WANG Fangyuan;ZHANG Wentao(School of Electronic Engineering and Automation,Guilin University of Electronic Technology,guilin guangxi 541004,China;Guangxi Key Laboratory of Optoelectronic Information Processing,Guilin Guangxi 541004,China)

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004 [2]广西光电信息处理重点实验室,广西桂林541004

出　　处：《激光杂志》2021年第6期7-11,共5页Laser Journal

基　　金：国家自然科学基金(No.41961050);广西特聘专家团队项目资助;广西自然科学基金(No.2019GXNSFBA245048);广西自动检测技术与仪器重点实验室主任基金项目(No.YQ20105)。

摘　　要：空间调制全偏振成像系统可以通过单次成像获得完整的Stokes参量信息,其系统的有效光谱范围内对图像重构效果有较大的影响。当带宽超出有效光谱范围时,会影响Stokes参量解调精度,甚至无法解调。通过对空间调制全偏振成像系统的调制模型进行分析研究,依据波段宽度判据表达式,对有效光谱范围内的图像重构算法进行修正,最后对不同带宽的解调精度进行仿真分析。研究结果表明:在有效光谱范围内,修正后的图像重构算法可以提高Stokes参量解调精度,偏振度解调误差<6.5%,优于修正前的重构效果。且在超出有效光谱带宽的一定范围内,修正后的图像重构算法的解调效果较理想,拓宽了有效光谱范围,尽可能保证最大的光通量。研究结果为空间调制全偏振成像系统的带宽设计提供新思路。The spatial modulation full polarization imaging system can obtain complete Stokes parameter information through a single imaging,and the effective spectral range of the system has a greater impact on the image reconstruction effect.When the bandwidth exceeds the effective spectral range,it will affect the accuracy of Stokes parameter demodulation,or even fail to demodulate.Through the analysis and research on the modulation model of the spatially modulated full-polarization imaging system,the image reconstruction algorithm in the effective spectral range is modified according to the expression of the band width criterion,and finally the demodulation accuracy of different bandwidths is simulated and analyzed.The research results show that within the effective spectral range,the corrected image reconstruction algorithm can improve the accuracy of Stokes parameter demodulation,and the polarization degree demodulation error is less than 6.5%,which is better than the reconstruction effect before correction.And within a certain range beyond the effective spectral bandwidth,the demodulation effect of the revised image reconstruction algorithm is ideal,which broadens the effective spectral range and ensures the maximum luminous flux as much as possible.The research results provide new ideas for the bandwidth design of spatially modulated all-polarization imaging systems.

关 键 词：偏振成像 空间调制 全偏振 有效光谱范围 

分 类 号：O436[机械工程—光学工程]