Design of cooled infrared switch-zoom optical system with long effective focal length based on R-C system
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摘要: 本文基于卡塞格林系统设计了红外制冷型长焦分档变倍光学系统,计算、推导了光学初始参数及组元的光焦度分配。采用了二次成像结构形式,主物镜组采用R-C光学结构用于缩短筒长,使用投影镜组解决冷屏匹配问题,利用调焦镜实现调焦,通过切换投影镜组后组实现变倍,然后对光学系统像差进行了优化设计,分别给出了长焦系统和短焦系统不同视场的成像质量优化结果,0.8视场内光学传递函数在空间频率17 lp/mm时均大于0.4。最后对主要结构进行了相应的精度分析,结果表明该设计能够很好地满足工程实际需要。Abstract: Based on the R-C system a cooled infrared swith-zoom optical system with long effective focal length is designed. The initial parameters are calculated and the components' focal power is deduced. Secondary imaging structure is adopted, and relay lens is used to match the cold stop. Zoom is realized by switching the relay lens of the short focal length system and the long focal length system. The optimized design of optical system aberration is made. The optimized imaging results of the long effective focal length optical system and the short effective focal length optical system at different field of view are presented, and the modulation transfer functions within 0.8 field of view at 17 lp/mm of spatial frequency are greater than 0.4. Finally, corresponding precision analysis of the main structure is made and the results show that the structure is rational and the imaging quality is good. The optical system can meet actual requirement.
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Key words:
- infrared switch-zoom lens /
- R-C system /
- infrared MTF /
- imaging quality
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[1] 贾永丹, 付跃刚, 刘智颖, 等. 双视场/双色红外消色差光学系统设计[J]. 光子学报, 2012, 41(6):638-641. JIA Y D, FU Y G, LIU ZH Y, et al.. Design of cual-fov athermal optical system for infrared dual-color[J]. Acta Photonica Sinica, 2012, 41(6):638-641.(in Chinese) [2] 韩莹, 王肇圻, 吴环宝, 等.紧凑型8~12μm波段折/衍混合双位置两档变焦光学系统设计[J]. 光子学报, 2007, 36(5):886-889. HAN Y, WANG Z Q, WU H B, et al.. Diffractive/refractive two-position system in 8~12μm[J]. Acta Photonica Sinica, 2007, 36(5):886-889.(in Chinese) [3] 孟剑奇. 双视场6倍变焦红外热成像光学系统设计[J]. 红外与激光工程, 2008, 37(1):89-92. MENG J Q. Dual-field zoom(6 x) infrared imaging optical system[J]. Infrared and Laser Eng., 2008, 37(1):89-92.(in Chinese) [4] 赵新亮, 王海霞, 崔丽, 等.长波双视场扫描型红外光学系统设计[J]. 红外与激光工程, 2011, 40(8):1517-1520. ZHAO X L, WANG H X, CUI L, et al.. Design of dual-field scanning LWIR optical system[J]. Infrared and Laser Eng., 2011, 40(8):1517-1520.(in Chinese) [5] 陈吕吉, 李萍, 冯生荣, 等.中波红外消热差双视场光学系统设计[J]. 红外技术, 2011, 33(1):1-3. CHEN L J, LI P, FENG SH R, et al.. Atheraml design for MW Infrared dual-field-view optical system[J]. Infrared Technology, 2011, 33(1):1-3.(in Chinese) [6] 晏蕾, 贾平, 洪永丰.红外双视场光学系统的初始结构求解[J]. 红外, 2011, 32(1):23-26. YAN L, JIA P, HONG Y F. Design of initial structrue of infrared dual field-of-view optical system[J]. Infrared, 2011, 32(1):23-26.(in Chinese) [7] 吴海清, 王海霞, 赵新亮.双波段/双视场红外光学系统设计[J]. 红外技术, 2010, 32(11):640-644. WU H Q, WANG H X, ZHAO X L. Design of dual-band/dual-field IR optical system[J]. Infrared Technology, 2010, 32(11):640-644.(in Chinese) [8] 董科研, 王健, 孙强, 等. 机载双视场中波红外光学系统优化设计[J]. 中国光学, 2012, 5(6):596-601. DONG K Y, WANG J, SUN Q, et al.. Design of an airborne dual field-of-view middle wave infrared optical system[J]. Chinese Optics, 2012, 5(6):596-601.(in Chinese) [9] 杨为锦, 孙强. 中波红外连续变焦系统设计[J]. 中国光学, 2010, 1(2):164-169. YANG W J, SUN Q. Design of middle infrared continuous zoom system[J]. Chinese Optics, 2010, 1(2):164-169.(in Chinese) [10] 骆守俊, 何伍斌, 李文虎, 等. 大面阵中波红外连续变焦光学系统设计[J]. 光学 精密工程, 2012, 20(10):2117-2122. LUO SH J, HE W B, LI W H, et al.. Design of middle infrared continuous zoom optical system with a large FPA[J]. Opt. Precision Eng., 2012, 20(10):2117-2122.(in Chinese) [11] 李荣刚, 杨栋梁, 刘琳.中波红外双视场光学系统设计[J]. 激光与红外, 2009, 39(6):640-642. LI R G, YANG D L, LIU L. Design of dual-field-of-view optical system for mid-wave infrared focal-plane arrays[J]. Laser Infrared, 2009, 39(6):640-642.(in Chinese) [12] 潘君骅.关于大望远镜卡焦R-C系统视场改正镜设计[J]. 光学 精密工程, 2002, 10(3):231-234. PAN J H. Research on the field corrector design for R-C syetem of the large telescope[J]. Opt. Precision Eng., 2002, 10(3):231-234.(in Chinese) [13] 袁旭沧.光学设计[M].北京:科学出版社, 1985. YUAN X C. Optical Design[M]. Beijing:Science Press, 1985.(in Chinese)
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