Two-mirror optical system with a small fold mirror

XinPing Liu; Yingcai Li; Jianfeng Yang

doi:10.1117/12.322028

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21 September 1998 Two-mirror optical system with a small fold mirror

XinPing Liu, Yingcai Li, Jianfeng Yang

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Proceedings Volume 3482, International Optical Design Conference 1998; (1998) https://doi.org/10.1117/12.322028
Event: International Optical Design Conference, 1998, Kona, HI, United States

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.

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XinPing Liu, Yingcai Li, and Jianfeng Yang "Two-mirror optical system with a small fold mirror", Proc. SPIE 3482, International Optical Design Conference 1998, (21 September 1998); https://doi.org/10.1117/12.322028

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