image-erecting prism

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• erecting prism — noun a right angled optical prism used to turn an inverted image upright • Hypernyms: ↑prism, ↑optical prism * * * Optics. See Dove prism. [1870 75] …   Useful english dictionary

• 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 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

• dove prism — ˈdōvə noun Usage: usually capitalized D Etymology: probably after Heinrich W. Dove died 1879 German physicist : a prism that reverts an image but does not produce deviation or displacement of the beam, the rotation of the prism about the axis of… …   Useful english dictionary

• Dove prism — Optics. a prism that inverts a beam of light, often used in a telescope to produce an erect image. Also called erecting prism, reversing prism, rotating prism. [named after Heinrich W. Dove (1803 79), German physicist] * * * …   Universalium

• optical prism — noun optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image • Syn: ↑prism • Derivationally related forms: ↑prismatic (for: ↑prism) • Hypernyms: ↑optical device …   Useful english dictionary

• Periscope — For the 1916 French film, see Le périscope. Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer s eye …   Wikipedia

• Binoculars — Binocular telescopes, or binoculars (also known as field glasses), are two identical or mirror symmetrical telescopes mounted side by side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular… …   Wikipedia

• Star diagonal — A star diagonal is an angled mirror or prism used in telescopes that allows viewing of objects that are at a 90° angle from the direction the telescope is pointing. It allows convenient and comfortable viewing when the telescope is pointed at, or …   Wikipedia

• arts, East Asian — Introduction       music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature.       Some studies of East Asia… …   Universalium