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\(ˈ) ̷ ̷| ̷ ̷ ̷ ̷-\ nounUseful english dictionary. 2012.
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
Parabolic reflector — Parallel waves coming in to a parabolic mirror are focused at a point F A parabolic reflector (or dish or mirror) is a reflective device used to collect or project energy such as light, sound, or radio waves. Its shape is that of a circular… … Wikipedia
Herschelian telescope — noun a reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed • Syn: ↑off axis reflector • Hypernyms: ↑reflecting telescope, ↑reflector * * * noun Usage: usually capitalized H : a reflecting… … Useful english dictionary
reflecting telescope — noun optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece Isaac Newton invented the reflecting telescope in 1668 • Syn: ↑reflector • Hypernyms: ↑optical telescope • Hyponyms: ↑Cassegrai … Useful english dictionary
Green Bank Telescope — Infobox Telescope name = Green Bank Telescope organization = NRAO location = Green Bank, West Virginia, USA coords = coord|38|25|58.23|N|79|50|21.88|W|display=inline,title wavelength = radio built = 1991 2002 first light = August 22, 2000 style … 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
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
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
Newtonian telescope — The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1642–1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton’s first reflecting telescope was completed in… … Wikipedia
Retroreflector — Infobox Laboratory equipment name = Retroreflector caption = A gold corner cube retroreflector acronym = other names = uses = Distance measurement by optical delay line inventor = manufacturer = model = related = A retroreflector (sometimes… … Wikipedia
