“高分四号”卫星相机装调中高精度在线测量技术  

High Precision Online Measurement Technology in Assembly and Adjustment of GF-4 Camera

作　　者：李凌[1] 王昀[1] 廖志波[1] 阴刚华[1] 刘志远[1] 

机构地区：[1]北京空间机电研究所,北京100190

出　　处：《航天返回与遥感》2016年第5期77-85,共9页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程

摘　　要："高分四号"卫星相机由主光学系统(里奇-克莱琴反射系统)和校正光学系统(折射系统)两部分构成。其中主光学系统主反射镜口径710mm,校正光学系统包括可见近红外、中波红外主份与中波红外备份三个光路。主镜组件调心与系统装配是相机装调工作的重要环节,传统的调心方法需要与主镜口径相匹配的高精度转台,不仅条件保障昂贵且调心周期长;基于结构孔位定位的装配方法也无法适应相机光路多,结构复杂紧凑的特点。因此"高分四号"卫星相机装调工作中引入了高精度在线测量技术,文章介绍了该技术在主镜组件调心与系统装配两个环节里的应用案例。通过引入激光跟踪仪、关节臂测量仪和点云拟合算法,提高了主镜组件调心速度,且调心后角度失调量优于10",平移失调量优于0.1mm;借助关节臂测量仪则将系统装配工作的精度提高到10-2mm量级,较传统装配方法有两个数量级的提升。相机完成装调后,地面各支路调制传递函数测试均满足研制要求,在轨成像优异。文章所论述的相关技术可为后续同类相机的研制提供参考。GF-4 camera includes reflection system（Ritchey-Chretien System） and refraction System. The diameter of main mirror in reflection system is 710mm. The main light path is divided into 3 branches by the refraction system, which are visible/near-infrared branch, primary mid-infrared branch and backup mid-infrared branch. Because of the large diameter, short work cycle and complex structure, the traditional methods are not fit the assembly and adjustment of GF-4 camera. The paper describes an application solution of laser tracker and measuring arm, which significantly shortens the work time and increases the assembly precision. By testing on the ground, the result of MTF （Modulation Transfer Function） testing completely meets the requirements. The imaging in-orbit is also good. The technology described in the paper will be useful for the development of other similar cameras.

关 键 词：装调 在线测量 关节臂测量仪 激光跟踪仪 高分辨率相机 

分 类 号：V465[航空宇航科学与技术—航空宇航制造工程]