flat corrector

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• Schmidt corrector plate — A Schmidt corrector plate, invented by Bernhard Schmidt in 1930 [http://www.ast.cam.ac.uk/history/schmidt] , is a lens used to correct spherical aberration in a reflecting telescope that uses a spherical primary mirror. The corrector is placed in …   Wikipedia

• Null corrector — Testing a spherical mirror using an interferometer. All surfaces in the tester are either flat or spherical, so the tester itself is fairly easy to fabricate and test. This setup can test a spherical mirror of any size since the wavefront is… …   Wikipedia

• Da Vinci Systems — is a main manufacturer of high end post production color grading and film restoration systems for feature films, video production and broadcast post production facilities. It was headquartered in Coral Springs, Florida still with offices in Los… …   Wikipedia

• Wright Camera — In 1935, just a few years after the introduction of the Schmidt camera, Franklin Wright (Berkley, California) presented his short alternative to the original arrangement. He placed Schmidt corrector at the focal plane, and had the mirror… …   Wikipedia

• Catadioptric system — A 150 mm aperture catadioptric telescope (Maksutov) A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric… …   Wikipedia

• Maksutov telescope — A 150mm aperture Maksutov Cassegrain telescope. The Maksutov is a catadioptric telescope design that combines a spherical mirror with a weakly negative meniscus lens in a design that takes advantage of all the surfaces being nearly spherically… …   Wikipedia

• Schmidt camera — A Schmidt camera, also referred to as the Schmidt telescope, is an astronomical camera designed to provide wide fields of view with limited aberrations. Other similar designs are the Wright Camera and Lurie Houghton telescope.Invention and… …   Wikipedia

• Citroën DS — Manufacturer Citroën Also called Citroën ID Production 1955–1975 Assembly …   Wikipedia

• Korrektor (Teleskop) — Ein Korrektor ist eine spezielle Anordnung von Linsen oder Spiegeln, die Abbildungsfehler eines Fernrohrobjektivs vermindert oder Abbildungsfehler durch die atmosphärische Dispersion (chromatische Aberration) beseitigt. Es gibt verschiedene… …   Deutsch Wikipedia

• 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

• Skygazing — is the act of observing the sky for pleasure or with an astronomical interest. Amateur astronomy observations are generally accomplished with the naked eye or with basic optical aids. Simple naked eye observations of the sky can reveal a great… …   Wikipedia