红外与毫米波学报2022，Vol.41Issue(3)：631-638,8.DOI:10.11972/j.issn.1001-9014.2022.03.015
空间光通信中应用于精密指向的面阵探测器的定位精度分析与验证
Analysis and verification of the positioning accuracy of a flat-panel detector used for precision pointing in space optical communication
摘要
Abstract
To realize a high-precision link in space optical communication,we analyzed key factors that affect the accuracy of flat-panel detectors in terms of target positioning. The error of the centroid algorithm was analyzed from the mechanism and the necessity of satisfying the spatial lossless sampling condition was verified by using a simulation. The defined NU value served as an indicator in quantifying the nonuniformity of the detector. As the NU value increased linearly,the positioning error of the centroid continued to increase,whereas the speed re?duced. When the NU value was 0. 005,the maximum positioning error was 0. 043 pixels. Considering that the light intensity of the target incident on the optical system varies constantly,the smaller the NU value,the closer the centroid is to the true position of the light spot. Furthermore,the pixel response of a typical complementary metal oxide semiconductor(CMOS)detector was experimentally tested under different illumination intensities. Based on the response curve,a mathematical model for the nonuniformity of the pixel response was established. It can be determined that the NU value fluctuates from 0. 0045 to 0. 0048 within the linear response range. The ex?perimental results of the spot centroid positioning accuracy verify that the absolute positioning error is less than 0. 05 pixels,which satisfies the requirements of high-precision links. Therefore,the effectiveness of the theory and simulation presented in this study can be validated.关键词
空间光通/信误差分析/定位精度/面阵探测器/非均匀性Key words
space optical communication/error analysis/positioning accuracy/flat-panel detector/nonuniformity分类
信息技术与安全科学引用本文复制引用
王旭,涂成翔,张亮,王建宇..空间光通信中应用于精密指向的面阵探测器的定位精度分析与验证[J].红外与毫米波学报,2022,41(3):631-638,8.基金项目
Supported by the National Natural Science Foundation of China(U1738204),the Shanghai Rising-Star Program(19QA1410400),the Key Technologies Research and Development Program(2017YFA0303900),the Youth Innovation Promotion Association of the Chinese Academy of Scienc-es,the Shanghai Municipal Science and Technology Major Project(2019SHZDZX01). （U1738204）
