基于R-C系统的长有效焦距制冷红外开关变焦光学系统设计

李. L. Gang, 杨晓许 Yang Xiao-xu, 张恒金 Zhang Heng-jin, 孙东岩 Sun Dong-yan
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引用次数: 0

摘要

在R-C系统的基础上,设计了一种长有效焦距的制冷红外变焦光学系统。计算了初始参数,推导了元件的焦距。采用二次成像结构,采用中继镜头配合冷停。变焦是通过切换短焦距系统和长焦距系统的中继镜头来实现的。对光学系统像差进行了优化设计。给出了长焦距光学系统和短焦距光学系统在不同视场下的优化成像结果,在17 lp / mm空间频率下,0.8视场内的调制传递函数大于0.4。最后对主要结构进行了相应的精度分析,结果表明结构合理,成像质量良好。该光学系统能满足实际要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design of cooled infrared switch-zoom optical system with long effective focal length based on R-C system
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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