secondary mirrors

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• First surface mirrors — A first surface mirror or front surface mirror (also commonly abbreviated FS mirror ) is a mirror with the reflective surface being above a backing, as opposed to the conventional, second surface mirror with the reflective surface behind a… …   Wikipedia

• Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …   Wikipedia

• Ritchey-Chrétien telescope — The Ritchey Chrétien telescope or RCT is a specialized Cassegrain telescope designed to eliminate coma, thus providing a relatively large field of view as compared to a more conventional configuration. An RCT has a hyperbolic primary and a… …   Wikipedia

• Active optics — is a relatively new technology for reflecting telescopes developed in the 1980s, which has more recently enabled the construction of a generation of telescopes with 8 metre primary mirrors. Active optics works by actively adjusting the telescope… …   Wikipedia

• Vatican Advanced Technology Telescope — Infobox Settlement official name = VATT pushpin subdivision type = Country subdivision name = USA latd = 32 | latm = 42 | lats = 4.78 | latNS = N longd = 109 | longm = 53 | longs = 32.54 | longEW = W elevation m = 3178 website = The Vatican… …   Wikipedia

• Obsession Telescopes — is an American telescope and optics manufacturer that specializes in Dobsonian telescopes. It was started in 1989 by David Kriege and is based in Lake Mills, Wisconsin.[1] Contents 1 Products 1.1 Models …   Wikipedia

• Combined Array for Research in Millimeter-wave Astronomy — The Combined Array for Research in Millimeter wave Astronomy (CARMA) is an astronomical instrument comprising 23 radio telescopes. These telescopes form an astronomical interferometer where all the signals are combined in a purpose built computer …   Wikipedia

• Carter Observatory — Infobox Historic building name =Carter Observatory caption =The Carter Observatory, showing the Thomas Cooke telescope dome map type = latitude = 41.28437 longitude =174.76697 location town = Wellington location country = New Zealand architect =… …   Wikipedia

• Ruth Crisp — is an author and philanthropist who lived in Christchurch, New Zealand until 1960. In 1962 the Ruth Crisp Estate published a book of poems and around 1965 the estate gave a large donation to the National Observatory of New Zealand, (Carter… …   Wikipedia

• Hale telescope — the 200 in. (508 cm) reflector at the Palomar Observatory. [after G. E. HALE] * * * ▪ astronomy in full  George Ellery Hale Telescope        one of the world s largest and most powerful reflecting telescopes (telescope), located at the Palomar… …   Universalium

• 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