roof prism

roof prism
: a glass prism used in an optical range finder and other instruments that performs the double function of changing the direction of the light rays by 90 degrees and reversing the image right to left — compare porro prism

* * *


* * *

n. a reflecting prism in which the reflecting surface is in two parts that are angled like the two sides of a pitched roof. Compare with porro prism
roof prisms (also roof-prism binoculars) a pair of binoculars using two such prisms, resulting in an instrument with parallel sides and objective lenses that are the same distance apart as the eyepieces

Useful english dictionary. 2012.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Roof prism — A roof prism (also called a Dach prism) is in general any kind of reflective optical prism containing a section where two faces meet at a 90° angle. Reflection from the two faces returns an image that is flipped laterally across the axis where… …   Wikipedia

  • roof prism — stoginė prizmė statusas T sritis fizika atitikmenys: angl. ridge prism; roof prism vok. Dachkantprisma, n; Dachprisma, n rus. крышеобразная призма, f; призма с крышей, f pranc. prisme en toit, m; prisme en toit, m …   Fizikos terminų žodynas

  • roof prism — noun a reflecting prism in which the reflecting surface is in two parts that are angled like the two sides of a pitched roof …   English new terms dictionary

  • roof prism — Optics. See Amici prism. * * * …   Universalium

  • Amici roof prism — An Amici roof prism, named for its inventor, the Italian astronomer Giovanni Amici, is a type of reflecting prism used to deviate a beam of light by 90° whilst simultaneously inverting the image. It is commonly used in the eyepieces of telescopes …   Wikipedia

  • Prism (optics) — For other uses, see Prism (disambiguation). A plastic prism In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. The exact angles between the surfaces depend on the application. The traditional… …   Wikipedia

  • Schmidt-Pechan prism — A Schmidt Pechan prism is a type of optical prism used to rotate an image by 180°. They are commonly used in binoculars as an image erecting system . Compared to binoculars using a Porro prism or Abbe Koenig a binoculars using a Schmidt Pechan… …   Wikipedia

  • Abbe-Koenig prism — An Abbe Koenig prism is a type of reflecting prism used to invert an image (rotate it by 180°). They are commonly used in binoculars and some telescopes for this purpose. The prism is named after Ernst Abbe and Albert Koenig.The prism is made… …   Wikipedia

  • Amici prism — An Amici prism, with a graphical ray tracing method …   Wikipedia

  • Porro prism — In optics, a Porro prism, named for its inventor Ignazio Porro, is a type of reflection prism used in optical instruments to alter the orientation of an image.It consists of a block of glass shaped as a right geometric prism with right angled… …   Wikipedia

Share the article and excerpts

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