concave parabolic mirror

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• parabolic mirror — noun a parabolic reflector for light radiation • Hypernyms: ↑parabolic reflector, ↑paraboloid reflector • Part Holonyms: ↑reflecting telescope, ↑reflector * * * noun see parabolic reflector 1 * * …   Useful english 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

• Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …   Wikipedia

• Mirror — looking glass redirects here. For other uses, see Looking Glass (disambiguation). This article is about wave reflectors (mainly, specular reflection of visible light). For other uses, see Mirror (disambiguation). A mirror, reflecting a vase A… …   Wikipedia

• parabolic aerial — /pærəˌbɒlɪk ˈɛəriəl/ (say paruh.bolik airreeuhl) noun an aerial used especially in radar and radio telescopes, consisting of a large concave mirror the reflective surface of which has the shape of a paraboloid …  

• Curved mirror — Reflections in a spherical convex mirror. The photographer is seen reflected at top right A curved mirror is a mirror with a curved reflective surface, which may be either convex (bulging outward) or concave (bulging inward). Most curved mirrors… …   Wikipedia

• Liquid mirror space telescope — A liquid mirror space telescope is a concept for a type of reflecting space telescope which uses a reflecting liquid such as mercury as its primary reflector.[1] There are several designs for such a telescope: 1. Twirled Pail: A pair of objects,… …   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

• Reflecting telescope — 24 inch convertible Newtonian/Cassegrain reflecting telescope on display at the Franklin Institute. A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light… …   Wikipedia

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …   Universalium