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Proceedings Paper

The design and analysis of wide angle and broadband infrared antireflective film
Author(s): Jian Leng; Yi-qin Ji; Hua-song Liu; Ke-wen Zhuang; Dan-dan Liu
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Paper Abstract

7.5 ~ 9.7μm traditional wide band antireflective (AR) film is designed on ZnS, choosing Ge, ZnS and YF3 as film material, and the average transmittance (T) could be elevated from 74.9% to 98% when AOI=0°. But while AOI=70°, T of p and s component is 85.9% and 75.6% separately, and the average transmittance is 80.8% because of the separation of s- and p-polarized light. Depolarization antireflective film is also designed with the same materials by equivalent-layer method to balance s- and p- component energy, and the polarization effect at different incident angles is analyzed. When AOI=0°, T is 99.3%, and when AOI=70°, T is 90.6%, 10% less than that of traditional AR film. So equivalent-layer method is effective to eliminate polarization effect of broadband antireflective coatings at large incident angle and then could effectively improve the optical performance, which is critical in precision guide system.

Paper Details

Date Published: 11 September 2013
PDF: 7 pages
Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89072M (11 September 2013); doi: 10.1117/12.2033061
Show Author Affiliations
Jian Leng, Fudan Univ. (China)
Tianjin Jinhang Institute of Technical Physics (China)
Yi-qin Ji, Tianjin Jinhang Institute of Technical Physics (China)
Hua-song Liu, Tianjin Jinhang Institute of Technical Physics (China)
Ke-wen Zhuang, Tianjin Jinhang Institute of Technical Physics (China)
Dan-dan Liu, Tianjin Jinhang Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 8907:
International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications
Haimei Gong; Zelin Shi; Qian Chen; Jin Lu, Editor(s)

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