倒立式三视场施密特望远镜关键技术研究  

Research on key technologies of inverted 3-FOV Schmidt telescope

作　　者：赖新华 李金鹏[3,4] 彭润富 杨永兴 王鑫蕊[4] 石旺舟 LAI Xinhua;LI Jinpeng;PENG Runfu;YANG Yongxing;WANG Xinrui;SHI Wangzhou(Shanghai Key Lab for Astrophysics,Shanghai 200234,China;Mathematics and Science College of Shanghai Normal University,Shanghai 200234;CAS Nanjing Astronomical Instruments Co.,Ltd.,Nanjing 210042,China;Nanjing Research Center of Astronomical Instruments,University of Science and Technology of China,Nanjing 210042,China)

机构地区：[1]上海市星系与宇宙学半解析研究重点实验室,上海200234 [2]上海师范大学数理学院,上海200234 [3]中国科学院南京天文仪器有限公司,江苏南京210042 [4]中国科学技术大学南京天文仪器研制中心,江苏南京210042

出　　处：《应用光学》2023年第6期1286-1293,共8页Journal of Applied Optics

基　　金：国家自然科学基金(12003067)。

摘　　要：研制了基于三分区镜的倒立式三视场施密特型望远镜,对其关键技术进行了分析。利用正三棱锥的几何对称性,推导了3个视场的视轴夹角与分区镜面夹角之间的关系式,设计了用于实现多视场观测功能的三分区镜;通过有限元法分析了倒立式施密特望远镜主镜重力形变对像质的影响,阐述了检测光路关键参数对施密特修正镜加工误差的影响程度,采用蒙特卡罗法对该光学系统的杂散光进行了分析。最后对整个光学系统进行了实验检测,检测结果表明:实际研制的三分区镜镜面之间的夹角为133.08°,可同时对相互垂直的3个视场进行观测;该望远镜光学系统的PV=0.614λ,RMS=0.105λ(λ=632.8 nm)。该系统可用于地球空间姿态测量,拓展了施密特望远镜的应用范围。An inverted 3-FOV(field of view)Schmidt telescope based on 3-facet mirror was developed,and its key technical problems were studied.Based on the geometric symmetry of regular triangular pyramid,the relationship between the visual axis angle of 3 FOVs and the angle of facet mirror was derived,and a 3-facet mirror was designed to realize the multi-field observation function.The influence of the gravity deformation of primary mirror of inverted Schmidt telescope on the image quality was analyzed by finite element method.The influence of the key parameters of testing optical path on the processing error of Schmidt corrector was expounded.The stray light of optical system was studied by Monte Carlo method.Finally,the whole optical system was tested experimentally,and a 3-facet mirror was actually developed.Results show that the included angle between the mirrors is 133.08°,which can observe 3 FOVs perpendicular to each other at the same time.The test result of the telescope optical system is PV=0.614λ,RMS=0.105λ(λ=632.8 nm).The system can be used to measure the earth attitude in space,which expands the application of Schmidt telescope.

关 键 词：施密特望远镜 三分区镜 重力形变 施密特修正镜 

分 类 号：TN202[电子电信—物理电子学] O439[机械工程—光学工程]