Two-mirror optical system with a small fold mirror

Details Two-mirror optical system with a small fold mirror Two-mirror optical system with a small fold mirror

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3482..871l&link_type=abstract

Proc. SPIE Vol. 3482, p. 871-876, International Optical Design Conference 1998, Leo R. Gardner; Kevin P. Thompson; Eds.

Physics

Scientific paper

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 degree(s) field angle and 0.50 approximately 0.70 micrometers 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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