- five-sided prism
- пентапризма
English-Russian electronics dictionary .
English-Russian electronics dictionary .
pentaprism — n. a five sided prism with two silvered surfaces used in a viewfinder to obtain a constant deviation of all rays of light through 90° … Useful english dictionary
motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… … Universalium
History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… … Wikipedia
Pentaprism — A pentaprism is a five sided reflecting prism used to deviate a beam of light by 90°. The beam reflects inside the prism twice, allowing the transmission of an image through a right angle without inverting it (that is, without changing the image… … Wikipedia
Circumferentor — Drawing of a circumferentor from the Cyclopaedia … Wikipedia
Heptahedron — A heptahedron (plural: heptahedra) is a polyhedron having seven sides, or faces.A heptahedron can take a surprising number of different basic forms, or topologies. Probably most familiar are the hexagonal pyramid and the pentagonal prism. Also… … Wikipedia
pentaprism — noun a prism having a five sided cross section with two silvered surfaces, giving a constant deviation of all rays of light through 90° … English new terms dictionary
Dice — For other uses, see Dice (disambiguation). Four coloured dice showing all six possible sides (on a right handed, 6 sided die with pips) A die (plural dice, from Old French dé, from Latin datum something which is given or played )[1] … Wikipedia
Johnson solid — The elongated square gyrobicupola (J37), a Johnson solid … Wikipedia
optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… … Universalium
Star polygon — Set of regular star polygons {5/2} {7/2} … Wikipedia