Cassegrainian telescope

Cassegrainian telescope
noun
a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror
• Hypernyms: ↑reflecting telescope, ↑reflector

* * *

\\|kasə|grānēən-\ noun
Usage: usually capitalized C
Etymology: N. Cassegrain 17th century French physician who invented it in 1672 + English -ian
: a reflecting telescope that has a paraboloidal primary mirror and hyperboloidal secondary mirror, is equivalent in its optical effects to a telephoto lens, and usually has the light brought to a focus through a perforation in the center of the primary mirror

* * *

Cassegrain telescope, Cassegrainian telescope /kas-ə-grānˈ(i-ən) telˈi-skōp/
noun
A type of reflecting telescope devised by, and named after, a 17c Frenchman, N Cassegrain

Useful english dictionary. 2012.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Cassegrainian telescope — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • Cassegrainian telescope — /kæsəˌgreɪniən ˈtɛləskoʊp/ (say kasuh.grayneeuhn teluhskohp) noun a reflecting telescope in which the primary mirror is perforated so that the light may pass through it to the eyepiece or photographic plate. Also, Cassegrain telescope… …  

  • Telescope — Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913 Webster]… …   The Collaborative International Dictionary of English

  • Telescope carp — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • Telescope fish — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • Telescope fly — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • Telescope shell — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • Telescope sight — Telescope Tel e*scope, n. [Gr. ? viewing afar, farseeing; ? far, far off + ? a watcher, akin to ? to view: cf. F. t[ e]lescope. See {Telegraph}, and { scope}.] An optical instrument used in viewing distant objects, as the heavenly bodies. [1913… …   The Collaborative International Dictionary of English

  • 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

  • telescope — Synonyms and related words: Cassegrainian telescope, Newtonian telescope, OAO, OSO, abbreviate, abridge, abstract, astronomical observatory, astronomical telescope, binoculars, bob, boil down, capsulize, clip, coelostat, compress, concertina,… …   Moby Thesaurus

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”