Instrument for observation from a concealed position
For other uses, see Periscope (disambiguation).
Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer's eyePrinciple of the lens periscope. The two periscopes differ in the way they erect the image. The left one uses an erecting prism whereas the right uses an erecting lens and a second image plane. a Objective lens b Field lens c Image erecting lens d Ocular lens e Lens of the observer's eye f Right-angled prism g Image-erecting prism
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position.[1][2]
In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle. This form of periscope, with the addition of two simple lenses, served for observation purposes in the trenches during World War I. Military personnel also use periscopes in some gun turrets and in armoured vehicles.[1]
More complex periscopes using prisms or advanced fiber optics instead of mirrors and providing magnification operate on submarines and in various fields of science. The overall design of the classical submarine periscope is very simple: two telescopes pointed into each other. If the two telescopes have different individual magnification, the difference between them causes an overall magnification or reduction.
^ abWalker, Bruce H. (2000). Optical Design for Visual Systems. SPIE Press. p. 117. ISBN 978-0-8194-3886-7.
^The Submarine Periscope: An Explanation of the Principles Involved in Its Construction, Together with a Description of the Main Features of the Barr and Stroud Periscopes. Barr and Stroud Limited. 1928.
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from...
Down Periscope is a 1996 American military comedy submarine film directed by David S. Ward, produced by Robert Lawrence, and starring Kelsey Grammer,...
Up Periscope is a 1959 World War II submarine film drama directed by Gordon Douglas, produced by Aubrey Schenck and starring James Garner and Edmond O'Brien...
A periscope lens, sometimes called a folded lens, is a mechanical assembly of lens elements that uses a prism or mirror to redirect the light through...
A periscope rifle is a rifle that has been adapted to enable it to be sighted by the use of a periscope. This enables the shooter to remain concealed...
Periscope Pictures is a Canadian production company, based in Charlottetown, Prince Edward Island. Founded by producers/writers Cheryl Wagner, the creator...
professional sports, and lifecasting. Platforms such as Facebook Live, Periscope, Kuaishou, Douyu, bilibili, YouTube, 17 include the streaming of scheduled...
In telecommunication, a periscope antenna is an antenna configuration in which the transmitting antenna is oriented to produce a vertical radiation pattern...
Kryptonite Panda (by Crowdstrike), Leviathan (by Proofpoint), MUDCARP, Periscope, Temp.Periscope, and Temp.Jumper, is an advanced persistent threat operated by...
Mitton and Robert D. Cardona Various British TV Adverts The Clearwater Periscope lens system was a type of television camera developed in 1983 by Clearwater...
Periscope Entertainment is a Los Angeles–based film and comic book company that was founded in 2004 by producer David Guy Levy. It has several projects...
Periscope Life is the seventh album by the Dutch progressive rock band Kayak, originally released on LP in 1980. The first CD issue (1993) had 2 bonus...
Virtual periscope is a system that allows submerged submarines to observe the surface above them without having to come to a shallower depth, as is required...
Find X7 Ultra is also being touted as the first phone to incorporate two periscope telephoto cameras. Both the Find X7 and the Find X7 Ultra feature curved...
targets to register hits. Examples of electro-mechanical games include Periscope and Rifleman from the 1960s. EM games typically combined mechanical engineering...
a sensor on a submarine which functions similarly to a periscope without requiring a periscope tube, thus freeing design space during construction and...
the Gundlach Rotary Periscope (Polish: Peryskop obrotowy Gundlacha), patented in 1938, which made possible 360° vision. The periscope enabled an observer...
Global Information
