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Infrared lens thermal effect: equivalent focal shift and calculating model
Zhang CS(张程硕); Shi ZL(史泽林); Feng B(冯斌); Xu BS(徐保树)
作者部门光电信息技术研究室
会议名称International Symposium on Optoelectronic Technology and Application 2014
会议日期May 13-15, 2014
会议地点Beijing, China
会议录名称Proc. Of SPIE 9301, International Symposium on Optoelectronic Technology and Application
出版者SPIE
出版地Bellingham, WA
2014
页码1-8
收录类别EI ; CPCI(ISTP)
EI收录号20150800547604
WOS记录号WOS:000349371300066
产权排序1
ISSN号0277-786X
关键词Infrared Systems Thermal Effect Defocus Aberrations Wave Aberration
摘要It's well-know that the focal shift of infrared lens is the major factor in degeneration of imaging quality when temperature change. In order to figure out the connection between temperature change and focal shift, partial differential equations of thermal effect on light path are obtained by raytrace method, to begin with. The approximately solution of the PDEs show that focal shift is proportional to temperature change. And a formula to compute the proportional factor is given. In order to understand infrared lens thermal effect deeply, we use defocus by image plane shift at constant temperature to equivalently represent thermal effect on infrared lens. So equivalent focal shift (EFS) is defined and its calculating model is proposed at last. In order to verify EFS and its calculating model, Physical experimental platform including a motorized linear stage with built-in controller, blackbody, target, collimator, IR detector, computer and other devices is developed. The experimental results indicate that EFS make the image plane shift at constant temperature have the same influence on infrared lens as thermal effect and its calculating model is correct.
语种英语
引用统计
文献类型会议论文
条目标识符http://ir.sia.cn/handle/173321/15330
专题光电信息技术研究室
通讯作者Zhang CS(张程硕)
作者单位1.Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, Liaoning, China
2.University of Chinese Academy of Sciences, Beijing, China
3.Key Laboratory of Opto-Electronic Information Processing, Chinese Academy of Sciences, Shenyang, Liaoning, China
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GB/T 7714
Zhang CS,Shi ZL,Feng B,et al. Infrared lens thermal effect: equivalent focal shift and calculating model[C]. Bellingham, WA:SPIE,2014:1-8.
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