基于楔板型分束镜的望远镜系统优化设计  

Visible-infrared telescope based on wedge-shaped beam splitter

作　　者：张超[1,2] 王鑫蕊 李金鹏 闫钧华 ZHANG Chao;WANG Xinrui;LI Jinpeng;YAN Junhua(Beijing Institute of Space Mechanics&Electricity,Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing,Beijing 10094,China;Nanjing University of Aeronautics and Astronautics,Academy of Astronautics,Nanjing 211106,China;Nanjing Astronomical Instrument Co.,LTD,Chinese Academy of Sciences,Nanjing 210042,China)

机构地区：[1]北京空间机电研究所先进光学遥感技术北京市重点实验室,北京100094 [2]南京航空航天大学航天学院,南京211106 [3]中科院南京天文仪器有限公司,南京210042

出　　处：《光学技术》2023年第2期163-167,共5页Optical Technique

摘　　要：研制基于楔板型分束镜的可见-红外光同步成像望远镜系统,通过优化设计分束镜楔角,抑制反射可见光鬼像产生,校正透射红外波段像差,实现对可见光波段与红外波段同时成像。对望远镜系统进行像质检测,主次镜系统RMS为0.093λ(λ=6328nm),可见光支路RMS达到0.120λ,红外光路成像质量满足要求。该系统采用卡塞格林共光路,用楔形板实现对可见光到中红外波段光线同步成像,使得宽波段望远镜设计更加轻便的同时提升装置成像性能。In order to solve the problem of primary imaging of visible light and infrared light,a wide-spectral aberration-corrected telescope system based on wedge-shaped beam splitter for simultaneous imaging of visible-infrared light was developed.The device uses a Cassegrain main system with a common aperture channel,and the beam splitter adopts a wedge plate design.By optimizing the design of the wedge angle of the beam splitter,the generation of reflected visible light ghost images can be suppressed,and the transmission is corrected to a certain extent.The aberration of infrared band imaging improves the resolution of the system.According to the design index,the Zemax software was used to simulate,and the results showed that the three imaging channels of the infrared light path,the visible light path and the infrared spectrum switching light path were better thanλ/10for the RMS wave aberration.In addition,the whole device system was analyzed and discussed separately,and the influence of manufacturing errors caused by the wedge beam splitter and system installation errors on the imaging quality was discussed,which served as a reference for the subsequent processing and installation of the device.Finally,the as-built telescope system was tested and analyzed with interferometer.The test results showed that the RMS of the main system was 0.093λ,the RMS of the visible light path was 0.120λ,and the imaging quality met the design requirements.The system adopts a Cassegrain common optical path,and uses a wedge-shaped plate to achieve synchronous imaging of visible light to mid-infrared light,which reduces the volume of the system and expands the function of the device.

关 键 词：楔板分束镜 卡塞格林系统 鬼像 像差 

分 类 号：V447.1[航空宇航科学与技术—飞行器设计]