concave reflector

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• reflector — [ri flek′tər] n. 1. a person or thing that reflects; esp., a surface, object, etc. that reflects light, sound, heat, or the like, as a piece of glass or metal, highly polished and usually concave, which reflects and directs radiant energy, as… …   English World dictionary

• reflector — Synonyms and related words: Cassegrainian telescope, Newtonian telescope, OAO, OSO, astronomical observatory, astronomical telescope, cheval glass, coelostat, concave mirror, convex mirror, coronagraph, coronograph, distorting mirror, glass, hand …   Moby Thesaurus

• reflector — re flec·tor || rɪ flektÉ™(r) n. person or thing which reflects; telescope that uses concave mirrors to focus; material used to inhibit the escape of neutrons from the core of a reactor (Physics) …   English contemporary dictionary

• parabolic reflector — noun a concave reflector used to produce a parallel beam when the source is placed at its focus or to focus an incoming parallel beam • Syn: ↑paraboloid reflector • Hypernyms: ↑reflector • Hyponyms: ↑parabolic mirror * * * noun …   Useful english dictionary

• paraboloid reflector — noun a concave reflector used to produce a parallel beam when the source is placed at its focus or to focus an incoming parallel beam • Syn: ↑parabolic reflector • Hypernyms: ↑reflector • Hyponyms: ↑parabolic mirror …   Useful english 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

• Newton's reflector — A replica of Newton s second reflecting telescope that he presented to the Royal Society in 1672 described as the better of the two instruments Newton built[1]. The first reflecting telescope built by Sir Isaac Newton in 1668 …   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

• Jean-Bertrand-Leon Foucault —     Jean Bertrand Léon Foucault     † Catholic Encyclopedia ► Jean Bertrand Léon Foucault     A physicist and mechanician, b. at Paris, 19 Sept., 1819; d. there 11 Feb., 1868. He received his early schooling at home and showed his mechanical… …   Catholic encyclopedia

• Antarctic krill — Taxobox name = Antarctic krill image width = 200px regnum = Animalia phylum = Arthropoda subphylum = Crustacea classis = Malacostraca ordo = Euphausiacea familia = Euphausiidae genus = Euphausia species = E. superba binomial = Euphausia superba… …   Wikipedia

• lieberkühn — A concave reflector around the objective of a microscope, for the purpose of directing a concentrated beam of light on the material being examined. [J.N. L.] …   Medical dictionary