optical telescope assembly

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• Hubble Space Telescope (HST) — Most sophisticated optical observatory ever placed into orbit around Earth. Because it is above Earth s obscuring atmosphere, it can obtain images much brighter, clearer, and more detailed than ground based telescopes can. Named for Edwin Hubble …   Universalium

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• Optical coating — Optically coated mirrors and lenses. An optical coating is one or more thin layers of material deposited on an optical component such as a lens or mirror, which alters the way in which the optic reflects and transmits light. One type of optical… …   Wikipedia

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• 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

• Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …   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

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• Great Paris Exhibition Telescope of 1900 — The Great Paris Exhibition Telescope of 1900, with an objective lens of 1.25 m (49.2 inches) in diameter, was the largest refracting telescope ever constructed. It was built as the centerpiece of the Paris Universal Exhibition of 1900. Its… …   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