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Ritchey-Chrétien telescope

(type of two-mirror reflecting telescope)

A Ritchey-Chrétien telescope (RCT or RC) is a reflector telescope with a specific reflector configuration of two hyperbolic mirrors, designed to limit telescope-induced aberrations. The primary mirror is hyperbolic but very close to parabolic. The secondary mirror is convex and hyperbolic. Curvature is chosen to eliminate third-order coma (the cubed term of a series-expansion that describes the aberration).

This design is common for large telescopes, including:

(telescope type,reflector)

Referenced by:
Large Altazimuth Telescope (BTA-6)
Dall-Kirkham telescope
reflector telescope