薄膜衍射消热差红外光学系统设计  

Design of Membrane Diffractive Athermal Infrared Optical System

作　　者：王烨菲 程艳萍 姚园[1] 李道京 于潇[1] WANG Yefei;CHENG Yanping;YAO Yuan;LI Daojing;YU Xiao(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Microwave Imaging,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国科学院空天信息创新研究院微波成像技术国家重点实验室,北京100190

出　　处：《红外技术》2021年第5期422-428,共7页Infrared Technology

基　　金：中国科学院国防重点实验室基金项目(CXJJ-19S014),高分辨率对地观测系统重大专项(GFZX0403260314)。

摘　　要：设计了一种薄膜衍射消热差红外光学系统。此光学系统口径为200 mm,焦距为200 mm,相对孔径为1,全视场角为3°,工作波段为10.7~10.9μm。该系统采用薄膜衍射镜作为主镜,厚度为微米量级,具有口径大、重量轻的优点,解决了现有红外光学系统重量和口径无法调和的矛盾。利用含有衍射面的折衍混合透镜进行校正主镜带来的强色散,有效解决薄膜衍射主镜成像视场小、谱段范围窄等问题。采用薄膜衍射主镜、折衍混合透镜,很好地利用了衍射面良好的消热差特性,再结合透镜材料的选择,对光学系统消热差起到了良好的作用,并且,衍射面的使用为系统设计优化过程中增加了自由度。薄膜衍射消热差红外光学系统重量轻、成像质量好、消热差性能优良,在红外遥感成像探测领域具有良好的应用前景。A membrane diffractive athermal infrared optical system is designed. The optical system has an aperture of 200 mm, a focal length of 200 mm, a relative aperture of 1, a full field angle of 3°, and a working wavelength of 10.7-10.9 μm. The system uses the membrane diffractive lens as the primary lens, with the thickness of a micron, and has the advantages of large aperture and light weight, which solves the contradiction between the weight and the aperture of the existing infrared optical system. A hybrid refractive diffractive lens with a diffractive surface is used to correct the strong dispersion of the primary lens, effectively solving the problems of small field of view and narrow spectral range of the membrane diffractive primary lens. The use of membrane diffractive primary lens and refractive diffractive hybrid lens effectively utilizes the good athermalization characteristics of the diffractive surface. Combined with the selection of lens materials, it plays a good role in the athermalization of the optical system;the use of the diffractive surface increases the degree of freedom in the process of system design optimization. Membrane diffractive athermal infrared optical system has the advantages of light weight, good imaging quality, and excellent athermalization performance, which has a good application prospect in the field of infrared remote sensing imaging detection.

关 键 词：光学设计 衍射光学 薄膜 消热差 

分 类 号：TN216[电子电信—物理电子学]