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Athermalization optical design of dual-wavelength infrared optical system with double-layer harmonic elements
Kang, Fuzeng1,2; Fan, Yangyu1; Lv, Guoyun1; Gao, Yongshen1; Wang, Hao2; Li, Yichao2
2019
Conference Name3rd International Conference on Photonics and Optical Engineering
Source PublicationThird International Conference on Photonics and Optical Engineering
Volume11052
Conference Date2018-12-05
Conference PlaceXi'an, China
PublisherSPIE
Contribution Rank1
AbstractA mathematical model of the diffraction efficiency change with the ambient temperature for the double-layer harmonic diffractive elements (HDE) is presented, and its effects are analyzed in this paper. The double-layer HDE structure is investigated and the optimization procedure is based on the equation of diffraction efficiency of the double-layer HDEs. By selecting appropriate design wavelength, the average diffraction efficiency of the system is reaching 99% in working wavelength and working temperature, which improves the image contrast and the image quality significantly. A set of dual-wavelength infrared optical system is designed based on dual-wavelength 320x240 element cooled thermal IR focal plane arrays detector. By introducing double-layer HDEs and aspheric surfaces, the chromatic aberration and the off-axis aberration are well corrected and the system structure is simplified. The system working in the wave band of 3.7?4.8μm and 7.7?9.5μm and with the F number of 2 is consisted of 8 elements and has 100% cold shield efficiency. The image quality evaluating results show that the performance of the dual-wavelength infrared optical system is very well in temperature from-40C° to +60C°. ? 2019 SPIE.
Department瞬态光学技术国家重点实验室
DOI10.1117/12.2521909
Indexed ByEI
ISBN9781510627796
Language英语
ISSN0277786X;1996767X
EI Accession Number20190806535051
Citation statistics
Document Type会议论文
Identifierhttp://ir.opt.ac.cn/handle/181661/31283
Collection瞬态光学技术国家重点实验室
Affiliation1.School of Electonics and Information, Northwestern Polytechnical University, 127 Youyi West Road, Xi'an, Shaanxi, China;
2.State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, 17 Xinxi Road, Xi'an, Shaanxi, China
Recommended Citation
GB/T 7714
Kang, Fuzeng,Fan, Yangyu,Lv, Guoyun,et al. Athermalization optical design of dual-wavelength infrared optical system with double-layer harmonic elements[C]:SPIE,2019.
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