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Proceedings Paper

Two-mirror optical system with a small fold mirror
Author(s): XinPing Liu; Yingcai Li; Jianfeng Yang
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Paper Abstract

A new configuration of two-mirror optical system with a small fold mirror is presented in this paper. Consisting of a concave (positive power) primary mirror followed by a small flat mirror, a concave (positive power) secondary mirror, four lenses and a beam splitter, it gives the excellent image quality. A 1.5-m EFL, F/10 system of the upper configuration is designed over the 4° field angle and 0.50 ~ 0.70 μm wavelength range. The aberrations have been highly corrected and the distortion is less than 0.3% over the field. The obscuration could be minimized by reducing primary radius of curvature and avoiding the spider that holds the small fold mirror.

Paper Details

Date Published: 21 September 1998
PDF: 6 pages
Proc. SPIE 3482, International Optical Design Conference 1998, (21 September 1998); doi: 10.1117/12.322028
Show Author Affiliations
XinPing Liu, Xi'an Institute of Optics and Precision Mechanics (China)
Yingcai Li, Xi'an Institute of Optics and Precision Mechanics (China)
Jianfeng Yang, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 3482:
International Optical Design Conference 1998
Leo R. Gardner; Kevin P. Thompson, Editor(s)

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