光学精密工程2018，Vol.26Issue(2)：480-491,12.DOI:10.3788/OPE.20182602.0480
微偏振片阵列红外成像非均匀性产生机理及其校正
Mechanism and calibration of non-uniformity for IR polarization imagery obtained with integrated micro-polarizer array
摘要
Abstract
For an infrared imaging system integrated with a micro-polarizer array(MPA),DoLP(de-gree of linear polarization)images are extremely sensitive to non-uniformity.Therefore,large error will occur when the non-uniformity is not calibrated.In order to calibrate the non-uniformity,a polar-ized-pixel model for optoelectronic conversion process was constructed by taking the incident light as a Stokes vector,and the non-uniformity generation mechanism under the combined effect of a micro-po-larizer array(MPA)and an infrared FPA was analyzed based on incident stimulation and radiation re-sponse data.A non-uniformity calibration(NUC)method was presented to solve the gain vectors of each polarized pixel by constructing multiple groups of measurement equations.The method construc-ted a gain matrix of a super pixel by using gain vectors from neighboring polarized pixels and joint Stokes extraction matrix to solve the NUC matrix inversely.The experimental results prove that the calibration method proposed reduces non-uniformity by 5 -20%,and improves the quality of DoLP images effectively.关键词
红外偏振成像/微偏振片阵列/非均匀性校正Key words
infrared polarization imaging/micro-polarizer array/non-uniformity calibration分类
信息技术与安全科学引用本文复制引用
刘海峥,史泽林,冯斌..微偏振片阵列红外成像非均匀性产生机理及其校正[J].光学精密工程,2018,26(2):480-491,12.基金项目
中国科学院创新基金(No.CXJJ-16S027) （No.CXJJ-16S027）
