projector

pro·jec·tor

P0588800 (prə-jĕk′tər)n.1. A device for projecting a beam of light.2. A device that projects an image onto a screen or other surface.3. One who devises plans or projects.

projector

(prəˈdʒɛktə) n1. (Photography) an optical instrument that projects an enlarged image of individual slides onto a screen or wall. Full name: slide projector 2. (Photography) an optical instrument in which a strip of film is wound past a lens at a fixed speed so that the frames can be viewed as a continuously moving sequence on a screen or wall. Full name: film projector or cine projector 3. (General Physics) a device for projecting a light beam4. a person who devises projects

pro•jec•tor

(prəˈdʒɛk tər)

n. 1. an apparatus for throwing an image onto a screen, as a motion-picture projector or magic lantern. 2. a device for projecting a beam of light. 3. a person who forms projects; planner or promoter. [1590–1600]

Thesaurus

Noun	1.	projector - an optical device for projecting a beam of lightoptical device - a device for producing or controlling light
	2.	projector - an optical instrument that projects an enlarged image onto a screenepidiascope - an optical projector that gives images of both transparent and opaque objectsfront projector - a projector for digital inputcine projector, film projector, movie projector - projects successive frames from a reel of film to create moving picturesoptical instrument - an instrument designed to aid visionoverhead projector - a projector operated by a speaker; projects the image over the speaker's headslide projector - projector that projects an enlarged image of a slide onto a screen

Translations

幻灯机放映机电影放映机

project

(ˈprodʒekt) noun1. a plan or scheme. a building project. 计划，方案 2. a piece of study or research. I am doing a project on Italian art. 科研项目（或工程） (prəˈdʒekt) verb1. to throw outwards, forwards or upwards. The missile was projected into space.发射2. to stick out. A sharp rock projected from the sea. 凸出，伸出 3. to plan or propose. 规划4. to make a picture or a film appear on a screen. 投射proˈjectile (-tail) , ((American) -tl) noun something that is thrown, usually as a weapon. 射弹proˈjection (-ʃən) noun 设计，规划 proˈjector noun a machine for projecting films, slides or transparencies onto a screen. a slide projector; an overhead projector (for transparencies). 幻灯机，电影放映机

projector

→ 放映机zhCN

projector

1. an optical instrument that projects an enlarged image of individual slides onto a screen or wall 2. an optical instrument in which a strip of film is wound past a lens at a fixed speed so that the frames can be viewed as a continuously moving sequence on a screen or wall 3. a device for projecting a light beam

Projector

an optical device that forms an image of objects on a diffusing surface that serves as a screen. Projectors are classified as diascopic, episcopic, and epidiascopic, depending on the method used to illuminate the object.

In a diascopic projector, or diascope, an image is formed on a screen by light rays that pass through a transparent object, such as a diapositive or a motion-picture film (see Figure 1). Motion-picture projectors are a type of diascope in which the illuminated transparent object—the motion-picture film—is shifted in a specific manner in order to create the effect of motion on the screen. In a slide viewer, a transparent object is also illuminated by light rays passing through it, but the object itself is viewed through an eyepiece. Diascopes are the most numer

Figure 1. Optical diagram of a diascopic projector: (1) light source, (2) condenser, (3) diapositive, (4) lens, (5) screen

ous and varied type of projectors: there are diascopes for the printing of photographs, viewing diapositives, reading microfilms, and processing aerial photographs. In many modern diascopes, the focusing and changing of the diapositives is accomplished automatically, and the projector may be equipped for sound reproduction.

An episcopic projector (see Figure 2) forms an image of an opaque object on a screen by means of light rays that are reflected and scattered from the object. This category includes instruments for copying topographic maps and projecting illustrations.

Epidiascopic projectors use a combination of the diascopic and episcopic systems and can project images of both transparent and opaque objects.

Figure 2. Optical diagram of an episcopic projector: (1) light source, (2) reflector, (3) object to be projected, (4) lens, (5) mirror, (6) screen

A projector has both mechanical and optical components. The mechanical components provide for proper positioning of objects relative to the optical system, for changing the objects, and for controlling projection times. The optical components perform the projection process and consist of a lighting system with a light source and condenser and a projection lens.

REFERENCES

Volosov, D. S., and M. V. Tsivkin. Teoriia i raschet svetoopticheskikh sistem proektsionnykh priborov. Moscow, 1960.
[Ivanov, A. M.] Zarubezhnye liubitel’skie kadroproektory i diaskopy. Moscow, 1968.

A. M. IVANOV

projector

[prə′jek·tər] (engineering acoustics) A horn designed to project sound chiefly in one direction from a loudspeaker. An underwater acoustic transmitter. (mathematics) One of the lines or rays in a central projection. (optics) optical projection system (ordnance) Any apparatus for launching a projectile, such as a gun or rocket launcher. Smooth-bore-type barrel or other unrifled weapon from which pyrotechnic signals, grenades, and certain mortar projectiles are fired. A rack for launching target rockets. Special type of gun for projecting antisubmarine projectiles.

projector

1. A lighting unit which concentrates the light within a limited solid angle by means of mirrors and lenses; provides a high value of luminous intensity in one direction. 2. A line dropped perpendicularly from a point to a plane surface.

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REFERENCES

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Words related to projector

noun an optical device for projecting a beam of light

Related Words

noun an optical instrument that projects an enlarged image onto a screen

Related Words