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English-Russian dictionary of geology. 2011.
reflector image
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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
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
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
Toroidal reflector — A toroidal mirror is a form of parabolic reflector which has a different focal distance depending on the angle of the mirror. The curvature is actually that of an elliptic paraboloid with a e b. If the shape were that of a toroid, the mirror… … Wikipedia
Newtonian reflector — noun reflecting telescope in which the image is viewed through an eyepiece perpendicular to main axis • Syn: ↑Newtonian telescope • Hypernyms: ↑reflecting telescope, ↑reflector … Useful english dictionary
off-axis reflector — noun a reflecting telescope with the mirror slightly tilted to throw the image to the side where it can be viewed • Syn: ↑Herschelian telescope • Hypernyms: ↑reflecting telescope, ↑reflector * * * (ˈ) ̷ ̷| ̷ ̷ ̷ ̷ noun : herschelian telesc … Useful english dictionary
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
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
History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… … Wikipedia
Eye — For other uses, see Eye (disambiguation), Ocular (disambiguation), Ocular, and Oculus. For taxon specific articles, see human eye, simple eye in invertebrates, mollusc eye, and arthropod eye. Eye … Wikipedia
