Sight (device)


Sight (device)

"Sights" redirects here. For the rock band, see The Sights".A sight is an optical device used to assist aim by guiding the eye and aligning it with a weapon or other item to be pointed. Various forms of sights exist, such as iron sights, red dot sights, peep sights, and telescopic sights. For aircraft use there are also reflector sights and gyro gunsights.

Sights are used in telescopes, firearms, artillery pieces, tank and aircraft weapons, and in various measuring instruments.

A theatrical followspot sight is used to aim the large spotlights used to follow the talent on stage during performances. They attach to the spotlight usually by magnets and are easily calibrated. They differ from rifle scopes in that they often provide zero magnification. The operator sees a red dot in the sight and "lays" it over the target to aim it.

Telescope sights

Astronomical telescopes often have a low-power sight attached to the telescope tube. These are often in the form of a small telescope or a reflex sight. These permit the telescope user to find a celestial object without having to deal with the high magnification of the main telescope.

Aircraft gunsights

Aircraft have some of the most complex gunsights.

Gyro Gunsight

In WWII, early P-51Ds were equipped with simple N-9 sights used light projected onto a glass. Later models were fitted with the sophisticated K-14 computing sight. Gyroscopes and magnetic electrical fields in the box were used with consideration of the speed of the projectiles, and the target's speed and usual distance. Data was reflected in images reflected on the glass, effectively calculating the target deflection. The pilot had to set the wingspan of the target, and use a throttle mounted control to keep the target centered. This made the pilot's hunting much easier. [ [http://www.cebudanderson.com/viewfromtheline.htm View from the line] ]

Radar ranging gunsight

Korean war F-86 Sabres used radar to compute distance to the target, which proved as one of many decisive advantages to MiG-15s which in many ways were the equal or better of the American fighters, but lacked this technology. Supersonic fighters such as the F-100 and its successor, the F-105 Thunderchief also were fitted with this technology. Nearly all MiG kills of the F-105 were scored with these gunsights. Ironically, the F-4 Phantom which was tasked with MiG patrol after heavy F-105 losses lacked an internal gun, and even when fitted with a gun pod, also lacked a dogfighting gunsight. The ultimate USAF version, the F-4E was based on adding an internal gun and gunsight. The succeeding "teen" generation fighters were all built with an internal gun and radar ranging gunsight, usually integrated with a heads-up display.

Measuring instruments

Sights on measuring instruments vary greatly from simple slots to complex optical devices.

ee also

*Iron sights
*Predicted impact point
*Crosshair or reticle

Notes


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Look at other dictionaries:

  • Sight — may refer to one of the following: *Visual perception *Sight (device), used to assist aim by guiding the eye *Sight (Keller Williams video), a 2005 Concert DVD by Keller Williams *Sight, a first person shooter video game created by FPS CreatorIn… …   Wikipedia

  • sight — n. view 1) to catch; keep sight of 2) to lose sight of 3) at (the) sight (to faint at the sight of blood; to fall in love at first sight) 4) by sight (to know smb. by sight) 5) in, within sight (the ship was no longer in sight) 6) on sight (to… …   Combinatory dictionary

  • Sight — (s[imac]t), n. [OE. sight, si[thorn]t, siht, AS. siht, gesiht, gesih[eth], gesieh[eth], gesyh[eth]; akin to D. gezicht, G. sicht, gesicht, Dan. sigte, Sw. sigt, from the root of E. see. See {See}, v. t.] 1. The act of seeing; perception of… …   The Collaborative International Dictionary of English

  • Sight draft — Sight Sight (s[imac]t), n. [OE. sight, si[thorn]t, siht, AS. siht, gesiht, gesih[eth], gesieh[eth], gesyh[eth]; akin to D. gezicht, G. sicht, gesicht, Dan. sigte, Sw. sigt, from the root of E. see. See {See}, v. t.] 1. The act of seeing;… …   The Collaborative International Dictionary of English

  • sight — ► NOUN 1) the faculty or power of seeing. 2) the action or fact of seeing someone or something. 3) the area or distance within which someone can see or something can be seen. 4) a thing that one sees or that can be seen. 5) (sights) places of… …   English terms dictionary

  • sight — [sīt] n. [ME siht < OE (ge)siht < base of seon, to SEE1] 1. a) something seen; view b) a remarkable or spectacular view; spectacle c) a thing worth seeing usually used in pl. [the sights of the city] …   English World dictionary

  • sight — (n.) O.E. gesiht, gesihð thing seen, from P.Gmc. *sekh(w) (Cf. Dan. sigte, Swed. sigt, M.Du. sicht, Du. zicht, O.H.G. siht, Ger. Sicht, Gesicht), stem of O.E. seon (see SEE (Cf. see) (v.)). Meaning …   Etymology dictionary

  • sight — n. & v. n. 1 a the faculty of seeing with the eyes (lost his sight). b the act or an instance of seeing; the state of being seen. 2 a thing seen; a display, show, or spectacle (not a pretty sight; a beautiful sight). 3 a way of looking at or… …   Useful english dictionary

  • Sight glass — A sight glass or water gauge is a transparent tube through which the operator of a tank or boiler can observe the level of liquid contained within. Liquid in tanksSimple sight glasses may be just a plastic or glass tube connected to the bottom of …   Wikipedia

  • sight — /saɪt / (say suyt) noun 1. the power or faculty of seeing; vision. 2. the act or fact of seeing. 3. range of vision: in sight of land. 4. a view; glimpse. 5. mental view or regard. 6. something seen or to be seen; spectacle: the sights of the… …   Australian English dictionary


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