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Proceedings Paper

Design of an off-axis three-mirror system with high speed for hyperspectral imagers
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Paper Abstract

With the enhancement of the spectral resolution and the extension of the spectral coverage of spectral imager, its prefixing telescopic objective is expected to have a wide passband and large relative aperture. Off-axis three-mirror optical system has such advantages of achromatic, wide spectral range, no-obstruction excellent aberration correction and inactivity to its environmental temperature that it is ideal for prefixing telescopic system of hyper-spectral imagers (HSI). In this paper the aberration characteristic of off-axis three-mirror systems is analyzed. According to the requirement of HSI and through optimization design, an off-axis three-mirror system with high speed is presented. Its F/ number is 2.47, its focal length 360 mm, and its field of view 2.5 degrees. The designed three-mirror objective is compact and diffraction-limited. Its uniqueness is that its secondary mirror is convex spherical so that its manufacture and test difficulty and cost is greatly reduced.

Paper Details

Date Published: 28 January 2009
PDF: 8 pages
Proc. SPIE 7156, 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments, 71561M (28 January 2009); doi: 10.1117/12.806373
Show Author Affiliations
Guangbiao Gong, Soochow Univ. (China)
Yiquan Ji, Soochow Univ. (China)
Shanbing Zhu, Soochow Univ. (China)
Ruirui Zhang, Soochow Univ. (China)
Weimin Shen, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 7156:
2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments

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