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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)
Department光电信息技术研究室
Conference NameInternational Symposium on Optoelectronic Technology and Application 2014
Conference DateMay 13-15, 2014
Conference PlaceBeijing, China
Source PublicationProc. Of SPIE 9301, International Symposium on Optoelectronic Technology and Application
PublisherSPIE
Publication PlaceBellingham, WA
2014
Pages1-8
Indexed ByEI ; CPCI(ISTP)
EI Accession number20150800547604
WOS IDWOS:000349371300066
Contribution Rank1
ISSN0277-786X
KeywordInfrared Systems Thermal Effect Defocus Aberrations Wave Aberration
AbstractIt'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.
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://ir.sia.cn/handle/173321/15330
Collection光电信息技术研究室
Corresponding AuthorZhang CS(张程硕)
Affiliation1.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
Recommended Citation
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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