光学精密工程2025，Vol.33Issue(6)：895-904,10.DOI:10.37188/OPE.20253306.0895
空间望远镜的设计仿真和低温波前测试
Performance simulation and wavefront measurement of telescope at cryogenic temperature
摘要
Abstract
Cryogenic space telescope is applied in 90K cryogenic environment,but developed in a laborato-ry environment at room temperature and pressure.The huge differences in application and development en-vironments result in two different sets of parameters of optical components.A telescope with good image quality at cryogenic temperature is actually a system with large aberration in laboratory environment.In or-der to quantitatively evaluate the imaging quality of a cryogenic telescope,a structural thermos optical per-formance simulation was conducted,and a testing method for wavefront error of the telescope in a 90 K cryogenic environment was designed.Firstly,the working temperature of the telescope at 90 K is achieved through the dual cooling of liquid nitrogen cold shroud radiation and refrigeration machine in the vacuum chamber.The wavefront measurement of the telescope is achieved through the interference mea-surement of parallel light tube beam expansion.Secondly,the error sources of the testing system were ana-lyzed and calibrated to correct the test results.Finally,the consistency between the measured cryogenic wavefront values and the model simulation of the telescope was compared and analyzed,as well as the manifestation of wavefront errors and the corresponding mapping relationship of structural design.The ex-perimental results show that the design simulation of the telescope is accurate,the 90 K low-temperature wavefront testing method is reasonable and feasible,the simulation accuracy is better than 20 nm,and the wavefront testing accuracy is better than 9 nm.The test results can be used for the design improvement of the optical mechanical system of the space telescope.关键词
空间望远镜/设计仿真/低温波前/干涉测量Key words
telescope/design simulation/wavefront at cryogenic/interferometric measurement分类
机械工程引用本文复制引用
宋俊儒,童卫明,金忠瑞,何东科,刘志远,马越..空间望远镜的设计仿真和低温波前测试[J].光学精密工程,2025,33(6):895-904,10.基金项目
国家重点研发计划(No.2021YFF0701300) （No.2021YFF0701300）
