erecting-prism telescope

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• 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

• 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

• 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

• binocular — binocularity, n. binocularly, adv. /beuh nok yeuh leuhr, buy /, n. 1. Usually, binoculars. Also called pair of binoculars, prism binoculars. an optical device, providing good depth effect, for use with both eyes, consisting of two small… …   Universalium