基于相对响应校正的多角度偏振成像仪几何定标精度提升方法  

Method for Improving Geometric Calibration Accuracy of Directional Polarimetric Camera Based on Relative Response Correction

作　　者：向光峰 孟炳寰 李双[1,3] 韩琳 盛庭芮[1,2,3] 孙亮 骆冬根 洪津 Xiang Guangfeng;Meng Binghuan;Li Shuang;Han Lin;Sheng Tingrui;Sun Liang;Luo Donggen;Hong Jin(Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences;University of Science and Technology of China,Hefei 230026,Anhui,China;Key Laboratory of Optical Calibration and Characterization,Chinese Academy of Sciences,Hefei 230031,Anhui,China)

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

出　　处：《光学学报》2022年第12期111-117,共7页Acta Optica Sinica

基　　金：王宽诚率先人才计划“卢嘉锡国际合作团队项目”(GJTD-2018-15)。

摘　　要：高精度的质心定位是基于单平行光管与分离式二维转台的几何定标方法的关键,但仪器的相对响应差异会影响质心定位精度。因此,提出了一种基于相对响应校正的质心定位精度提升方法,可有效地提升质心定位精度,进而提升几何定标精度。基于多角度偏振成像仪的实验室几何定标实验证明了所提方法的提升效果。提升效果在大视场区域中更为显著,最大几何定标精度约为0.1 pixel。最终,基于所提质心定位精度提升方法在实验室中获得了高精度的多角度偏振成像仪几何模型参数,模型拟合残差优于0.1 pixel。High-precision centroid positioning is the key to the geometric calibration method based on a single collimator and a separated two-dimensional turntable.However,the relative response difference of the instrument will affect the centroid positioning accuracy.Therefore,a centroid positioning accuracy improvement method based on the relative response correction is proposed,which can effectively improve the centroid positioning accuracy,thereby improving the geometric calibration accuracy.The laboratory geometric calibration experiment based on the directional polarimetric camera proves the improvement effect of the proposed method.The improvement effect is more significant in the large field of view area,and the maximum geometric calibration accuracy is about 0.1 pixel.Finally,based on the proposed centroid positioning accuracy improvement method,the geometric model parameters of high-precision directional polarimetric camera are obtained in the laboratory,and the model fitting residual is better than 0.1 pixel.

关 键 词：几何光学 几何定标 多角度偏振成像仪 相对辐射校正 几何模型 

分 类 号：TH744[机械工程—光学工程]