多角度偏振成像仪鬼像校正方法  

Correction of Ghost Artifacts for Directional Polarimetric Camera

作　　者：张苗苗 孟炳寰[1,3] 韩琳[3] 洪津[1,3] ZHANG Miao-miao;MENG Bing-huan;HAN Lin;HONG Jin(Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China;University of Science and Technology of China, Hefei, Anhui 230026, China;Key laboratory of Optical Calibration and Characterization of Chinese Academy of Sciences, Hefei,Anhui 230031, China)

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031 [2]中国科学技术大学,合肥230026 [3]中国科学院通用光学定标与表征技术重点实验室,合肥230031

出　　处：《光子学报》2019年第1期29-37,共9页Acta Photonica Sinica

基　　金：国家自然科学基金(No.41405037);高分辨率对地观测系统重大专项(民用部分)(No.30-Y20A19-9007-15/17)~~

摘　　要：根据多角度偏振成像仪光学系统特点,分析了仪器的鬼像分布特性,结合光学设计软件CodeV与ZEMAX确定了产生严重鬼像的光学工作面,并对实验测得的鬼像图像进行了标记.在此基础上,利用鬼像畸变与视场的关系,采用多项式拟合的方法得到仪器全视场鬼像位置和形变,并通过实测图像确定了原像和鬼像图像之间的能量衰减比,建立了仪器全视场的鬼像校正模型.最后分别对未饱和及过饱和图像进行了校正,结果表明,此校正方法可以消除至少90%的鬼像杂光.According to the characteristics of directional polarimetric camera optical system,the ghost distribution characteristics of the instrument was analyzed.The optical working surface that could produce severe ghost images was determined through the optical design software CodeV combined with ZEMAX,and the ghost image of the experimental measurement was marked.On this basis,using the relationship between ghost image system distortion and field of view,polynomial fitting method was used to obtain the full-field ghost image position and deformation of the instrument.The energy ratio between the original image and the ghost image was determined by the measured image,and the ghost correction model of the full field of view of the instrument was established.Finally,the unsaturated and supersaturated images were corrected.The results show that the proposed correction method can eliminate at least90%of ghost.

关 键 词：成像系统 多角度偏振成像仪 鬼像校正模型 鬼像位置 能量占比 

分 类 号：TH74[机械工程—光学工程]