长春理工大学学报（自然科学版）
長春理工大學學報（自然科學版）
장춘리공대학학보（자연과학판）
JOURNAL OF CHANGCHUN UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
2期
5-8
,共4页
偏振测量误差%误差敏感度%协方差矩阵%波片方位误差%奇异值分解
偏振測量誤差%誤差敏感度%協方差矩陣%波片方位誤差%奇異值分解
편진측량오차%오차민감도%협방차구진%파편방위오차%기이치분해
polarimetric error%error sensitivity%covariance matrix%retarder azimuth error%singular decomposition
针对波片快轴方位误差严重影响旋转波片Stokes偏振仪的入射光Stokes矢量的反演精度等问题，本文提出一种研究波片快轴方位误差敏感度及误差最小化的方法。首先，推导出由波片方位误差向SV反演误差的传递矩阵W，利用协方差矩阵研究Stokes矢量反演误差向量，提炼出评价偏振仪误差敏感度的参数EWV。其次，研究了EWV与波片方位角、波片位相延迟量和光强测量次数的关系。最后，为了抑制三种主要误差源对Stokes矢量反演的影响，对4次光强测量的旋转波片Stokes偏振仪中波片方位与波片位相延迟量进行了研究。结果表明，基于参数EWV的波片快轴方位误差敏感度及误差最小化的方法可以有效描述波片快轴方位误差对Stokes矢量的反演精度的影响，提高Stokes矢量反演精度。
針對波片快軸方位誤差嚴重影響鏇轉波片Stokes偏振儀的入射光Stokes矢量的反縯精度等問題，本文提齣一種研究波片快軸方位誤差敏感度及誤差最小化的方法。首先，推導齣由波片方位誤差嚮SV反縯誤差的傳遞矩陣W，利用協方差矩陣研究Stokes矢量反縯誤差嚮量，提煉齣評價偏振儀誤差敏感度的參數EWV。其次，研究瞭EWV與波片方位角、波片位相延遲量和光彊測量次數的關繫。最後，為瞭抑製三種主要誤差源對Stokes矢量反縯的影響，對4次光彊測量的鏇轉波片Stokes偏振儀中波片方位與波片位相延遲量進行瞭研究。結果錶明，基于參數EWV的波片快軸方位誤差敏感度及誤差最小化的方法可以有效描述波片快軸方位誤差對Stokes矢量的反縯精度的影響，提高Stokes矢量反縯精度。
침대파편쾌축방위오차엄중영향선전파편Stokes편진의적입사광Stokes시량적반연정도등문제，본문제출일충연구파편쾌축방위오차민감도급오차최소화적방법。수선，추도출유파편방위오차향SV반연오차적전체구진W，이용협방차구진연구Stokes시량반연오차향량，제련출평개편진의오차민감도적삼수EWV。기차，연구료EWV여파편방위각、파편위상연지량화광강측량차수적관계。최후，위료억제삼충주요오차원대Stokes시량반연적영향，대4차광강측량적선전파편Stokes편진의중파편방위여파편위상연지량진행료연구。결과표명，기우삼수EWV적파편쾌축방위오차민감도급오차최소화적방법가이유효묘술파편쾌축방위오차대Stokes시량적반연정도적영향，제고Stokes시량반연정도。
To delve into the bad influence on the precision of reconstructing incident Stokes vector (SV) caused by the azimuth error of the retarder,a method was proposed to minimize the sensitivity and azimuth error of the retarder. Firstly,in order to understand the effect of the azimuth of the retarder on SV reconstruction,the error transferring ma-trix W from the azimuth error of retarder to SV reconstruction error was derived,and SV reconstruction error was ana-lyzed by means of covariance matrix to abstract the figure of merit EWV charactering the error sensitivity of the po-larmeter. Secondly, the relationships between EWV and the azimuth of the retarder, between EWV and the retardance of the retarder, between EWV and intensity measurement number were investigated. Finally, it was concluded that the errors from the three major error sources for the polarimeter doing 4 measurements might be effectively restrained. The results indicate that the influence of the wave plate fast axis azimuth error on the Stokes vector retrieval accuracy can be described effectively based on the minimization method of EWV parameters azimuth error sensitivity, thus improving SV reconstructive accuracy.
