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Proceedings Paper

Design and fabrication of an infrared dichroic filter used for multi-channel image-forming system
Author(s): Weibo Duan; Dingquan Liu; Fengshan Zhang
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Paper 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.

Paper Details

Date Published: 14 November 2007
PDF: 6 pages
Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 672220 (14 November 2007); doi: 10.1117/12.783111
Show Author Affiliations
Weibo Duan, Shanghai Institute of Technical Physics (China)
Dingquan Liu, Shanghai Institute of Technical Physics (China)
Fengshan Zhang, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 6722:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies

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