- secondary reflector
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вспомогательный отражатель, вспомогательное зеркало
Англо-русский словарь технических терминов. 2005.
secondary reflector
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Secondary mirror — A secondary mirror (or secondary) is a second light gathering and focusing surface in a reflector telescope. Light gathered by the primary mirror is directed towards a focal point typically past the location of the secondary. The secondary… … Wikipedia
Reflector (photography) — In photography and cinematography, a reflector is an improvised or specialised reflective surface used to redirect light towards a given subject or scene. Types Apart from certain highly specialized components found in enlargers, projectors and… … Wikipedia
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
Neutron reflector — A neutron reflector is any material that reflects neutrons. This refers to elastic scattering rather than to a specular reflection. The material may be graphite, beryllium, steel, and tungsten carbide, or other materials. A neutron reflector can… … 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
Sulfur lamp — The sulfur lamp (also sulphur lamp) is a highly efficient full spectrum electrodeless lighting system whose light is generated by sulfur plasma that has been excited by microwave radiation. The technology was developed in the early 1990s, but,… … Wikipedia
Stage lighting instrument — Stage lighting instruments are used in stage lighting to illuminate theatrical productions, rock concerts and other performances taking place in live performance venues. They are also used to light television studios and sound stages.Terminology… … Wikipedia
Cassegrain antenna — In telecommunications and radar, a Cassegrain antenna is an antenna in which the feed radiator is mounted at or near the surface of a concave main reflector and is aimed at a convex secondary reflector slightly inside the focus of the main… … Wikipedia
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
