Catadioptric Gregorian Telescope

This paper presented at (AMOS)
Advanced Maui Optical and Space Surveillance Technologies Conference 2006.

Abstract

Two all-spherical catadioptric Gregorian telescope designs suitable for meter class telescopes are described. Common to both designs are a group of small, conventional lenses placed at the intermediate focus of the Gregorian system to correct the aberrations of the high-speed (f/1.5) spherical primary mirror and spherical secondary mirror. In the first design, a classic Gregorian configuration, the secondary mirror amplifies the focal length of the primary to yield a typical f/8 beam. A second configuration is illustrated that has the secondary mirror reducing the primary’s focal length resulting in a higher-speed, (f/1) imaging system.

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