第22卷第8期 2014年8月
文章编号
1004924X(2014)08-1995-06
光学精密工程
Optics and Precision Engineering
无遮拦折反射红外光学系统
史广维*，张新，张建萍
（中国科学院长春光学精密机械与物理研究所中国科学院光学
系统先进制造技术重点实验室，吉林长春130033）
Vol.22No.8
Aug.2014
摘要：提出了一种新型无遮拦红外折反射光学系统的设计方法以解决原系统存在的中心遭拦间题。分析了传统离轴两反望远系统由于存在线性像散而无法实现无遮拦设计的原因，给出了消线性像散的条件。基于上述条件提出了通过对接共轴透镜组实现无遮拦折反射系统设计的基本思想。最终，通过联接不同的中继镜组完成了无遮拦中波、长波红外系统的设计。设计的应用于制冷型3~5um中波和8~12um长波红外的两套无遮拦折反光学系统的焦距为200mm， F数为2，全视场为2.75°×2.2°。各视场光学传递函数显示设计的光学系统的成像质量接近衍射极限。得到的结果表
明，利用消线性像散的共焦离轴两反系统与同轴透镜组联合设计，可以得到高性能无遮拦的折反射红外光学系统。关键调：光学设计；无速拟设计；折反射红外系统；离轴两反光学系统
中图分类号：TN216；V248.3
文献标识码：A
doi:10,3788/OPE,20142208. 1995
Unobscuredcatadioptricinfraredopticalsystems
SHI Guang-wei',ZHANG Xin,ZHANG Jian-ping
(KeyLaboratory of Optical SystemAduanced Manufacturing Technology,Changchun Instituteof Optics
FineMechanics and Physics,ChineseAcademy of Sciences,Changchun130033,China)
Correspondingauthor,E-maildqsgw@yahoo.cn
Abstract: A new design method for unobsured catadioptric infrared optical systems was presented to a void theobstruction of traditional catadioptric systems.The linearaberration reasons of conventional off-axis two-mirror telescopes were analyzed. As the unobscured optical system is difficult to be de-signed because of the linear astigmatism in the off-axis two-mirror telescope, the conditions to elimi-nate the linear astigmatism were discussed. On the conditions, an design idea of unobsured cata dioptric optical systems was proposed through associating with coaxal lenses. By combining different relay lenses, two unobsured catadioptric infrared optical systems were implemented for 3—5 μm MW IR and 8—12 μm LW IR applications. The optical design parameters of the two systems are effective focal length of 200 mm, F=2, and the full field of view of 2. 75°X2.2°. The performance of the two systems approaches to diffractive limit from Modulation Transfer Function(MTF) curves of all field of view. The design results show that the high performance unobscured catadioptric infrared optical sys-tems will be obtained by combination of zero linear astigmatism confocal off-axis two-mirror telescopes
收稿日期：2013-06-28；修订日期：2013-08-30.
基金项目：国家自然科学基金青年基金资助项目（No.61007009)