红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2015年
4期
1243-1248
,共6页
偏振遥感%信噪比%条件数%奇异值分解%检偏器方位角
偏振遙感%信譟比%條件數%奇異值分解%檢偏器方位角
편진요감%신조비%조건수%기이치분해%검편기방위각
polarization sensing%signal-noise-ratio%condition number%singular value decomposition%azimuth of polarizer
非理想透镜组的偏振效应引起偏振测量系统的测量矩阵改变，导致系统最佳配置漂移。为了最大化气溶胶偏振探测仪的信噪比，利用Jones矩阵的方法计算前置光学透镜组的起偏度，并分别以系统分析矩阵的条件数和参数Tr(BBT)为优化参数对检偏器的放置角度进行优化。经过优化，得到检偏器的最佳方位角，在670 nm通道系统分析矩阵的条件数由1.8360降为1.6894，在1641 nm通道系统分析矩阵的条件数由1.9777降为1.7714。结果表明，两种优化方法的结果基本一致，经过优化之后两个偏振测量通道的信噪比都提升10%左右。
非理想透鏡組的偏振效應引起偏振測量繫統的測量矩陣改變，導緻繫統最佳配置漂移。為瞭最大化氣溶膠偏振探測儀的信譟比，利用Jones矩陣的方法計算前置光學透鏡組的起偏度，併分彆以繫統分析矩陣的條件數和參數Tr(BBT)為優化參數對檢偏器的放置角度進行優化。經過優化，得到檢偏器的最佳方位角，在670 nm通道繫統分析矩陣的條件數由1.8360降為1.6894，在1641 nm通道繫統分析矩陣的條件數由1.9777降為1.7714。結果錶明，兩種優化方法的結果基本一緻，經過優化之後兩箇偏振測量通道的信譟比都提升10%左右。
비이상투경조적편진효응인기편진측량계통적측량구진개변，도치계통최가배치표이。위료최대화기용효편진탐측의적신조비，이용Jones구진적방법계산전치광학투경조적기편도，병분별이계통분석구진적조건수화삼수Tr(BBT)위우화삼수대검편기적방치각도진행우화。경과우화，득도검편기적최가방위각，재670 nm통도계통분석구진적조건수유1.8360강위1.6894，재1641 nm통도계통분석구진적조건수유1.9777강위1.7714。결과표명，량충우화방법적결과기본일치，경과우화지후량개편진측량통도적신조비도제승10%좌우。
The polarization effect of the imperfect lens components changes the analysis matrix of the polarimetry system, so the optimum configuration of the system shifts. In order to maximize SNR of the aerosol polarimeter, the polarization degree of the imperfect lens components was computed by means of Jones matrix, and the optimum azimuth angles of polarizers were found to minimize the condition number of the system analysis matrix and the parameter Tr ( BBT ) , respectively . After optimizing , the optimum angles of polarizers at 670 nm channel and 1 641 nm channel were found, respectively. The condition number of the system analysis matrix reduced from 1.836 0 to 1.689 4 at 670 nm channel, while that of the system analysis matrix fall from 1.977 7 to 1.771 4 at 1 641 nm channel. It is indicated that the results of these two optimization methods are consistent, and both of the SNRs are is improved about 10% at 670 nm and 1 641 nm channels.
