中波红外大相对孔径消热差光学系统的设计  

Design on Athermalised Middle Wavelength Infrared Optical System with Large Relative Aperture

作　　者：刘琳[1,2,3] 沈为民[2,3] 周建康[2,3] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006 [2]苏州大学现代光学技术研究所,江苏苏州215006 [3]苏州大学江苏省现代光学技术重点实验室,江苏苏州215006

出　　处：《中国激光》2010年第3期675-679,共5页Chinese Journal of Lasers

基　　金：国家863计划(2007AA12Z103)资助课题

摘　　要：设计了基于非制冷探测器工作的f′=100 mm,D/f′=1,2w=5°的中波红外光学系统。该光学系统结构简单紧凑,具有较大的相对孔径,能够在-20~60℃空间环境温度变化范围内保持良好的成像质量。光学系统选用了佩茨瓦尔结构型式,通过材料的选择以及光焦度的合理分配,实现了光学被动消热差。采用折衍混合透镜,简化了整个光学系统的结构,减小了系统体积和重量。此外,该系统还具有较大的后工作距。Based on uncooled detector,an optical system is designed with 100 mm focal length,1 F number,±2.5°field of view,working in the 3~5 μm wave band.The optical system has the advantages of large relative aperture and compact construction.While working under the condition of-20 ℃~60 ℃ the system can keep high quality image.With the Petzval objective,carefully selected optical material and reasonable optical power distribution,passive optical athermalization can be realized by using this system.The hybrid lens is used to simplify construction and decrease the volume and weight of the optical system.Also,large back focal length is another feature of the optical system.

关 键 词：光学设计 非制冷探测器 红外系统 消热差 

分 类 号：TH741[机械工程—光学工程]