摘要
空间相机广泛采用光学拼接方式扩大幅宽。拼接组件的热变形对探测器图像的配准造成影响。文章通过对空间光学相机拼接组件的光机热分析和试验,得出拼接组件热稳定性对光学拼接焦面图像配准的影响,为空间相机的设计优化提供了依据。文章选择空间相机入轨初期的开始成像时刻和成像12min结束时刻两个工况进行仿真分析和成像试验,发现由于温度分布的变化,拼接组件热变形导致成像开始时刻不同探测器间图像发生约3个像元的错行误差,并在成像结束时刻减小至约2个像元。试验结果表明,拼接组件热稳定性对光学拼接焦面图像配准有显著影响,在空间相机的设计过程中应考虑该因素。
Optical butting is used to expand the coverage width of space cameras. The thermal deformation of the butting assembly affects image registration between different detectors. The purpose of this paper is to testify the influence of thermal stability of the butting assembly on image registration of the optical splicing focal plane, and provide a basis for the design optimization of the space camera. In this paper, two operating conditions are selected, i.e. the beginning time of the space camera imaging process in orbit and the end time after 12-minutes imaging. The test system is built to carry out the thermal vacuum imaging experiment.Due to changes in temperature distribution and thermal deformation of the butting assembly, the misalignment error of about 3 pixels between different detectors occurs at the beginning of imaging, and the error is reduced to about 2 pixels at the end of imaging. The research results show that the thermal stability of the butting assembly has important impacts on the image registration of the optical splicing focal plane, which should be considered in the design optimization of the space camera.
作者
梅强
曹学强
张博文
吕秋风
张泽敏
MEI Qiang;CAO Xueqiang;ZHANG Bowen;LYU Qiufeng;ZHANG Zemin(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)
出处
《航天返回与遥感》
CSCD
北大核心
2021年第5期31-38,共8页
Spacecraft Recovery & Remote Sensing
基金
国家重点研发计划资助项目(2016YFB0500503)。
关键词
热变形
图像配准
光学拼接
航天遥感
thermal deformation
image registration
optical butting
space remote sensing
作者简介
梅强,男,1983年生,2012年获中国空间技术研究院光学工程硕士学位,高级工程师。研究方向为航天遥感器总体设计。E-mail:39624876@qq.com。
