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消热差大相对孔径中波红外望远物镜的研制
引用本文:刘琳,陈新华,沈为民.消热差大相对孔径中波红外望远物镜的研制[J].光学技术,2011,37(4):418-423.
作者姓名:刘琳  陈新华  沈为民
作者单位:1. 苏州大学物理科学与技术学院,江苏苏州215006;苏州大学现代光学技术研究所,江苏苏州215006;江苏省现代光学技术重点实验室,江苏苏州215006
2. 苏州大学现代光学技术研究所,江苏苏州215006;江苏省现代光学技术重点实验室,江苏苏州215006
基金项目:国家高技术研究发展计划(863计划)资助项目(2007AA12Z103)
摘    要:为满足低成本空间热成像系统重量轻、适应环境温度范围宽的要求,研制了消热差的大相对孔径中波红外望远物镜,其焦距为100mm,F数为1,全视场角为5°.物镜设计采用了匹兹伐结构型式,仅由两块硅(Si)透镜和一块锗(Ge)的折/衍混合透镜组成,能够实现-20~+60℃环境温度变化范围内光学被动消热差.对实际加工的红外物镜进行...

关 键 词:成像光学  大相对口径  折/衍混合系统  消热差  中波红外  非制冷探测器

Development of an athermalization midwave infrared telescopic-objective with fast speed
LIU lin , CHEN Xin-hua , SHEN Wei-min.Development of an athermalization midwave infrared telescopic-objective with fast speed[J].Optical Technique,2011,37(4):418-423.
Authors:LIU lin  CHEN Xin-hua  SHEN Wei-min
Institution:2,3 (1.School of Phys Sci & Tech,Soochow University,Suzhou 215006,Jiangsu,China)(2.Institute of Modern Optical Technology,Soochow University,Suzhou 215006,Jiangsu,China)(3.Jiangsu Key Laboratory of Modern Optical Technology,Soochow University,Suzhou 215006,Jiangsu,China)
Abstract:In order to meet the requirement of light weight,good adaptability to wide environment temperature change for low cost space thermal imaging systems,an athermalization midwave infrared objective with fast speed is developed.The focal length is 100mm,F-number is 1,and full field of view is 5°.The designed optical system adopts Petzval structure,which includes only two pieces of Si refractive lens and a piece of Ge hybrid lens.Passive optical athermalization is applied,so the system can work over wide temperature range from-20~+60℃.The fabrication and alignment of the optical system are completed,MTF is tested.The results show that the system can keep stable and good image quality over certain temperature range.The developed objective has large relative aperture,good adaptability to environment temperature,compact structure and high quality image.The imager composed of the above objective and certain type of uncooled detector is compatible for payload of micro-satellite.
Keywords:imaging optics  large relative aperture  refractive-diffractive hybrid system  athermalisation  mid-wave infrared  uncooled detector
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