Cassegrain mirror

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• Cassegrain — [kas′ə grān΄] adj. of an arrangement of mirrors, lenses, etc. used in reflecting telescopes and microwave antennas, having its focus or transmission point near or behind the center of the main mirror Cassegrainian adj. * * * …   Universalium

• Cassegrain — [kas′ə grān΄] adj. of an arrangement of mirrors, lenses, etc. used in reflecting telescopes and microwave antennas, having its focus or transmission point near or behind the center of the main mirror Cassegrainian adj …   English World dictionary

• Cassegrain reflector — The Cassegrain reflector is a combination of two coaxial reflectors used in Cassegrain telescopes and radio antennas.First developed in 1672 by Laurent Cassegrain, this reflector is a combination of a primary concave mirror and a secondary convex …   Wikipedia

• Cassegrain reflector — ▪ astronomical instrument  in astronomical telescopy, an arrangement of mirrors to focus incoming light at a point close to the main light gathering mirror. The design was proposed in 1672 by French priest Laurent Cassegrain.       In the… …   Universalium

• Cassegrain telescope — /kas euh grayn /, Astron. a reflecting telescope in which the light, passing through a central opening in the primary mirror, is brought into focus a short distance behind it by a secondary mirror. Also called Cassegrainian telescope /kas euh… …   Universalium

• Cassegrain telescope — [ kasɪgreɪn] noun a reflecting telescope in which light reflected from a secondary mirror passes through a hole in the primary mirror. Origin C19: named after N. Cassegrain, the French astronomer who devised it …   English new terms dictionary

• Cassegrain telescope — /kas euh grayn /, Astron. a reflecting telescope in which the light, passing through a central opening in the primary mirror, is brought into focus a short distance behind it by a secondary mirror. Also called Cassegrainian telescope /kas euh… …   Useful english dictionary

• Schmidt-Cassegrain telescope — The Schmidt Cassegrain is a catadioptric telescope. It combines a folded optical path with a corrector plate to make a compact astronomical instrument. Invention and DesignThe Schmidt Cassegrain is a design based on Bernhard Schmidt s Schmidt… …   Wikipedia

• Laurent Cassegrain — was a Catholic priest born in the region of Chartres around 1629 and died at Chaudon (Eure et Loir) on August 31, 1693. At the time of his death he was working as a teacher giving science classes at the Collège de Chartres, a French lycée. There… …   Wikipedia

• Argunov-Cassegrain telescope — The Argunov Cassegrain telescope is a telescope design first introduced in 1972 by P.P. Argunov. All optics are spherical, and the classical Cassegrain secondary mirror is replaced by three air spaced lens elements. The element farthest from the… …   Wikipedia

• Mangin mirror — Diagram of a Mangin mirror. In optics, a Mangin mirror is a negative meniscus lens with the reflective surface on the rear side of the glass forming a curved mirror that reflects light without spherical aberration. This reflector was invented in… …   Wikipedia