Schmidt telescope
a wide-angle reflecting telescope used primarily for astronomical photography, in which spherical aberration and coma are reduced to a minimum by means of a spherical mirror with a corrector plate near its focus. Also called Schmidt reflector.
[1935-40; named after Bernard Schmidt (1879-1935), German inventor]

* * *

also called  Schmidt camera  
  telescope in which a spherical primary mirror receives light that has passed through a thin aspherical lens, called a correcting plate, that compensates for the image distortions—namely, spherical aberrations (aberration)—produced by the mirror. The Schmidt telescope is thus a catadioptric telescope; i.e., its optics involve both the reflection and refraction of light. Because the Schmidt telescope uses a spherical collecting mirror instead of a paraboloidal one (as conventional reflecting telescopes do), it is free from astigmatism and so has a wide field of view. The Schmidt instrument can, in effect, provide a sharper image of a larger area of the celestial sphere than ordinary reflectors and is thus ideal for star surveys.

      The device was invented in 1930 by optician Bernhard Schmidt (Schmidt, Bernhard Voldemar) of the Bergedorf Observatory in Hamburg. The Schmidt-Maksutov telescope, invented by Russian optician Dmitry D. Maksutov in 1941, is similar in design and purpose to the Schmidt telescope but has a spherical meniscus, a lens in which one side is concave and the other is convex, in place of the correcting plate of the Schmidt.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Schmidt telescope — noun reflecting telescope that has plate that corrects for aberration so a wide area of sky can be photographed • Syn: ↑Schmidt camera • Hypernyms: ↑reflecting telescope, ↑reflector …   Useful english dictionary

  • Schmidt telescope — noun A telescope, having a wide field of view, comprising a thin aspheric lens and a large concave mirror Syn: Schmidt camera …   Wiktionary

  • Schmidt telescope — noun a type of catadioptric telescope used for wide angle astronomical photography, with a thin glass plate at the front to correct for spherical aberration. Origin 1930s: named after the German inventor Bernhard V. Schmidt …   English new terms dictionary

  • Schmidt telescope — noun see Schmidt camera …   New Collegiate Dictionary

  • United Kingdom Schmidt Telescope — UK Schmidt Telescope Le UK Schmidt Telescope (UKST) est un télescope de Schmidt de 1,2 mètre, administré par l observatoire anglo australien et situé à côté du télescope anglo australien de 3,9 mètres à l observatoire de Siding Spring en… …   Wikipédia en Français

  • UK Schmidt Telescope — Le UK Schmidt Telescope (UKST) est un télescope de Schmidt de 1,2 mètre, administré par l observatoire anglo australien et situé à côté du télescope anglo australien de 3,9 mètres à l observatoire de Siding Spring en Australie. C est un télescope …   Wikipédia en Français

  • UK Schmidt Telescope — The 1.2 metre UK Schmidt Telescope (UKST) is operated by the Anglo Australian Observatory, and located adjacent to the 3.9 metre Anglo Australian Telescope at Siding Spring Observatory, Australia. It is a survey telescope with a 6° by 6° field of …   Wikipedia

  • Uppsala Southern Schmidt Telescope — The Uppsala Schmidt Telescope was moved to Siding Spring Observatory from Mount Stromlo Observatory in 1980. Has field of view three times as large as the Anglo Australian Telescope. Uses a spherical not parabolic mirror with 0.6m correcting… …   Wikipedia

  • Samuel Oschin Schmidt Telescope — Télescope de Schmidt de 48 pouces, soit 122 cm, d ouverture et de rapport d ouverture F/D 2,5, installé à l observatoire du Mont Palomar Sommaire 1 Les débuts 2 La Palomar Observatory Sky Survey 3 POSS II …   Wikipédia en Français

  • Telescope — Télescope Pour les articles homonymes, voir Télescope (homonymie). Un télescope, (du grec tele signifiant « loin » et skopein signifiant « regarder, voir »), est un instrument optique permettant d augmenter la luminosité ainsi …   Wikipédia en Français

Share the article and excerpts

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