大视场离轴三反光学系统场曲特性与装调方法  

Field Curvature Characteristics and Alignment Method for the Off-Axis Three-Mirror Optical System with Wide Field-of-View

作　　者：钟兴 马驰 李艳杰 刘润山 Zhong Xing;Ma Chi;Li Yanjie;Liu Runshan(Chang Guang Satellite Technology Co.Ltd.,Changchun,Jilin 130033,China)

机构地区：[1]长光卫星技术有限公司,吉林长春130033

出　　处：《光学学报》2021年第9期191-198,共8页Acta Optica Sinica

基　　金：国家重点研发计划(2016YFB0500904)。

摘　　要：基于矢量波像差理论,分析了离轴三反光学系统装调过程中在小量失调状态下的场曲特性,提出了通过倾斜焦面补偿系统失调产生场曲的方法。在此基础上,结合某遥感相机进行了仿真模拟,具体分析了焦面分视场数目与三反射镜安装精度要求的关系,提出了系统装调流程和方法。利用测试相机调制传递函数的方法,对相机的场曲特性进行了测试,并通过修正焦面倾角实现场曲像差补偿。修正后的相机边缘视场调制传递函数得到明显提升,相机各视场调制传递函数均优于0.21。Based on the vector wavefront aberration theory,the field curvature characteristic of the off-axis three-mirror optical system under a small misalignment during installation and adjustment was analyzed.A method for generating field curvature by tilting the focal plane to compensate for system misalignment is proposed.The simulation analysis was conducted using a remote sensing camera.Besides,the relationship between the number of split field-of-view of focal plane and the tertiary mirror installation accuracy requirements was analyzed,and the optical system alignment process and method were given.Then,the field curvature characteristic of the camera was tested by measuring the modulation transfer function,and the focal plane inclination angle was corrected to compensate for the curvature aberration.After the correction,the modulation transfer function of the edge field-of-view significantly improved.The modulation transfer function of each field-of-view of the camera is greater than 0.21.

关 键 词：光学设计 离轴三反系统 矢量波像差理论 失调 场曲 光学系统 大视场 

分 类 号：V248.3[航空宇航科学与技术—飞行器设计]