薛志鹏, 丛杉珊, 孙美娇, 张雷, 刘金全, 于鑫. 空间相机波像差灵敏度及集成仿真方法[J]. 红外与激光工程, 2022, 51(11): 20220109. DOI: 10.3788/IRLA20220109
引用本文: 薛志鹏, 丛杉珊, 孙美娇, 张雷, 刘金全, 于鑫. 空间相机波像差灵敏度及集成仿真方法[J]. 红外与激光工程, 2022, 51(11): 20220109. DOI: 10.3788/IRLA20220109
Xue Zhipeng, Cong Shanshan, Sun Meijiao, Zhang Lei, Liu Jinquan, Yu Xin. Wavefront aberration sensitivity and integrated analysis method for spaceborne camera[J]. Infrared and Laser Engineering, 2022, 51(11): 20220109. DOI: 10.3788/IRLA20220109
Citation: Xue Zhipeng, Cong Shanshan, Sun Meijiao, Zhang Lei, Liu Jinquan, Yu Xin. Wavefront aberration sensitivity and integrated analysis method for spaceborne camera[J]. Infrared and Laser Engineering, 2022, 51(11): 20220109. DOI: 10.3788/IRLA20220109

空间相机波像差灵敏度及集成仿真方法

Wavefront aberration sensitivity and integrated analysis method for spaceborne camera

  • 摘要: 针对一种空间相机新型单杆主承力结构,采用波像差灵敏度模型和集成仿真分析两种方法,实现光机结构轻量化设计过程中的系统波像差评价,以保证在力学条件下的成像质量。所提出的波像差灵敏度方法能够基于波像差与失调量的线性关系进行构建,对于以相机成像质量为约束条件指导光机结构的优化设计具有重要意义。首先,基于光学系统的失调原理,推导了光学元件失调量与系统波像差的灵敏度模型。然后,采用有限元方法获取力学工况下的节点位移量,并基于最佳拟合(best-fit)方法计算主、次镜的失调量,对失调后的系统进行光学分析得到系统的波像差。最后,针对5 kg级空间光学相机,采用所提出的两种方法进行了建模与分析,并开展了相应的重力工况分析与试验。灵敏度分析方法相对于光机集成软件仿真方法误差为16.8%,所提出的方法能够应用于设计阶段对系统成像性能的快速评估。

     

    Abstract: Aiming at a new type of single cantilever main support structure of space camera, both wave aberration sensitivity model and integrated simulation analysis are proposed to calculate the camera's wave aberration in the lightweight design of optomechanical structure, so as to ensure the imaging quality under mechanical conditions. The proposed wave aberration sensitivity method can model based on the linear relationship between wave aberration and misalignment, which is of great significance to guide the optimal design of optomechanical structure under the constraint of the camera imaging quality. Firstly, the sensitivity model of optical element misalignment and wavefront aberration is derived based on the principle of optical system misalignment. Then, the nodal displacements under mechanical condition are obtained by finite element method, and the misalignment of primary and secondary mirrors is calculated based on best-fit fitting method. The wavefront aberration of the camera is obtained by the optical analysis of the misaligned system. Finally, the two methods proposed in this paper are used for modeling and analysis of a 5 kg level space optical camera, and the corresponding gravity condition analysis and test are also performed. The error of sensitivity model is 16.8% compared with the optomechanical integrated simulation method, and the sensitivity model can be applied to the rapid calculation of system imaging performance in the design phase.

     

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