Design and fabrication of an infrared dichroic filter used for multi-channel image-forming system

Weibo Duan; Dingquan Liu; Fengshan Zhang

doi:10.1117/12.783111

14 November 2007 Design and fabrication of an infrared dichroic filter used for multi-channel image-forming system

Weibo Duan, Dingquan Liu, Fengshan Zhang

Proceedings Volume 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 672220 (2007) https://doi.org/10.1117/12.783111
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

Infrared band is so wide that no detector can cover the whole range. In order to obtain relatively wide range of optical signals, multi-channel image-forming system which separates optical signal into several wavebands and images the signal on corresponding detectors is widely used. As an important optical element, dichroic filter is equipped in multi-channel image-forming system frequently to divide optical signal into different wavebands. One kind of infrared dichroic filter was designed and fabricated, the spectrum range covers from 1.6μm to 13 μm and the incidence angle is 45°. The spectral curve was measured by Perkin-Elemer infrared spectrometer. The average reflectance in 1.6 μm~2.2 μm was over 95% and the average transmittance in 9 μm~13 μm was more than 85%. After spectrum measurement and environment reliability experiment, it was found that the infrared dichroic filter was competent to space engineering application.

Citation Download Citation

Weibo Duan, Dingquan Liu, and Fengshan Zhang "Design and fabrication of an infrared dichroic filter used for multi-channel image-forming system", Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 672220 (14 November 2007); https://doi.org/10.1117/12.783111

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