An optical design for dual-band infrared diffractive telescope
Received:April 24, 2018  Revised:June 11, 2018  download
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Author NameAffiliationE-mail
WANG Hao Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences wanghao14@mails.ucas.ac.cn 
KANG Fu-Zeng Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences kangfuzeng@opt.ac.cn 
ZHAO Wei Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences  
LI Yi-Chao Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences  
Abstract:In this paper, the double-layer harmonic diffractive element (HDE) structure is investigated and the optimization procedure is based on the equation of diffraction efficiency of the double-layer diffractive optical element. The diffraction efficiency of the system in the designed middle and far infrared wavebands is larger than 99%, which improves the image contrast and the imagequality significantly. A new dual-band infrared double-layer HDE telescope is designed, which can work in the middle and far infrared wavebands. It is shown that the system approximately attains diffraction limit and is easy to processed.
keywords:diffraction efficiency, HDE, optical design
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Copyright:《Journal of Infrared And Millimeter Waves》