catadioptric system

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An optical system in which mirrors and lenses bring light to a focus. The best-known catadioptric designs are the Schmidt–Cassegrain and Maksutov telescopes, in both of which the incoming beam passes through a transparent corrector plate. Alternative designs, such as the Sampson catadioptric, may use smaller lenses in the converging beam to correct some of the aberrations that would otherwise be present.

Subjects: Astronomy and Astrophysics.

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