CAJ | 학술논문

大视场偏振CCD相机内部的多个光学表面会改变入射光的偏振状态，并且改变的程度与入射光的偏振态、视场角和方位角等有关，影响了仪器偏振测量精度，从而制约了偏振成像遥感数据的定量化应用水平。为解决这一问题，从考虑偏振效应的大视场偏振相机响应输出模型出发，研究模型参数的标定方法，通过设计试验获取了模型参数标定数据。将经过标定的大视场偏振 CCD 相机测试值和可调偏振度光源预设偏振度值进行对比，结果显示偏振相机在0°、15°、25°视场角下的偏振度测量平均误差不大于1.18%，远小于光学镜头自身的起偏度。消除偏振遥感仪器自身的偏振敏感性影响，为将来我国自主星载偏振遥感图像的定量化应用奠定基础。
대시장편진CCD상궤내부적다개광학표면회개변입사광적편진상태，병차개변적정도여입사광적편진태、시장각화방위각등유관，영향료의기편진측량정도，종이제약료편진성상요감수거적정양화응용수평。위해결저일문제，종고필편진효응적대시장편진상궤향응수출모형출발，연구모형삼수적표정방법，통과설계시험획취료모형삼수표정수거。장경과표정적대시장편진 CCD 상궤측시치화가조편진도광원예설편진도치진행대비，결과현시편진상궤재0°、15°、25°시장각하적편진도측량평균오차불대우1.18%，원소우광학경두자신적기편도。소제편진요감의기자신적편진민감성영향，위장래아국자주성재편진요감도상적정양화응용전정기출。
The polarization state of the object is altered due to the surfaces of the optical lens in the polarization CCD camera with large viewing field, and the variation relate to the field of view, azimuth angle and polarization states of the observed beams. The polarimetric accuracies limit the application of polarization remote sensing due to the polarization phenomenon of the instrument. To overcome the problems, calibration method of the model parameters and retrieval of the polarization information is introduced based on the polarimetric calibration model. In order to verify the calibration method feasibility, the Degree of Linear Polarization (DOLP) comparison tests of the calibrated polarization CCD camera with large viewing field compared with the high-precision variable polarization light source have been carried out. Experimental results show that the DOLP accuracy of the calibrated polarization CCD camera is better than 1.18% at the 0°, 15° and 25° field of view. The method of polarimetric calibration would get rid of the influence of polarization phenomena of the polarization CCD camera, and contribute to fundamental basis for the quantitative application of polarization remote sensing information for the Chinese polarized satellite sensor.