大相对孔径紧凑型非制冷光学系统消热设计  

Athermal design of compact uncooled optical system with large relative aperture

作　　者：安晓强[1] 王茜[1] 宋波[1] 

机构地区：[1]西南技术物理研究所,四川成都610041

出　　处：《激光与红外》2015年第7期795-799,共5页Laser & Infrared

摘　　要：对常用光学被动消热技术措施进行了归纳总结。针对长波非制冷光学系统大相对孔径、高透过率、小型化和良好环境适应性等特点,基于640×512大面阵非制冷探测器的应用,利用CODE V光学设计软件,设计了一个焦距f=70 mm,视场角为10.44°×8.36°,F数为0.85,总长为85 mm的三片式光学系统。在-50-70℃温度范围内,所有视场的MTF值在25 lp/mm处均大于0.61,光学畸变小于0.5%,光学系统成像质量良好。公差分析结果表明光学零件加工和光机装配工艺成熟稳定,光学系统设计具有良好的工程可研制性。The common technical measures of optical passive athermalization are summarized. Aiming at the characteristics of uncooled long wavelength optical system,including large relative aperture,high transmission,small dimension and good environmental adaptability etc.,an optical system including three lens is designed and optimized by CODE V based on uncooled detector of 640 × 512 large focal plane,and the performance parameters of optical system include focal length of 70 mm,field of view of 10. 44° × 8. 36°,F number of 0. 85 and total length of 85 mm. In the range of-50 - 70 ℃,the modulation transform function（ MTF） of all fields of view is greater than 0. 61 at 25 lp / mm,and the distortion is less than 0. 5%. The results of tolerance analysis show that optical elements processing and optical mechanical assembly are mature and stable,and optical system design has good engineering performance.

关 键 词：大相对孔径 长波非制冷 被动消热 光学设计 

分 类 号：TN216[电子电信—物理电子学]