aperture
n. opening; circular hole that controls the amount of light entering a camera | ||||
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APERTURE definition was found in categories: Language, Idioms & Slang(5) Medicine(1) Entertainment & Music(2) Science & Technology(3) Sports(1) Arts & Humanities(1) Computer & Internet(2) Religion & Spirituality(1) Encyclopedia(1)
APERTURE Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Aperture
(n.)
The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
(n.)
The act of opening.
(n.)
An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
(n.)
The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
(n.)
The act of opening.
(n.)
An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
| WordNet 2.0 |
aperture
Noun
1. a device that controls amount of light admitted
(hypernym) regulator
(part-holonym) camera, photographic camera
2. a natural opening in something
(hypernym) hole
(hyponym) pupil
(part-holonym) eye, oculus, optic
3. an man-made opening; usually small
(hypernym) opening
(hyponym) mouthpiece, embouchure
Noun
1. a device that controls amount of light admitted
(hypernym) regulator
(part-holonym) camera, photographic camera
2. a natural opening in something
(hypernym) hole
(hyponym) pupil
(part-holonym) eye, oculus, optic
3. an man-made opening; usually small
(hypernym) opening
(hyponym) mouthpiece, embouchure
| hEnglish - advanced version |
aperture
aperture
\ap"er*ture\ (?; 135), n. [l. apertura, fr. aperire. see aperient.]
1. the act of opening. [obs.]
2. an opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. an aperture between the mountains. the back aperture of the nostrils.
3. (opt.) the diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
note: the aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100° aperture.
similar words(2)
very small aperture terminal
angular aperture
aperture
\ap"er*ture\ (?; 135), n. [l. apertura, fr. aperire. see aperient.]
1. the act of opening. [obs.]
2. an opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. an aperture between the mountains. the back aperture of the nostrils.
3. (opt.) the diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
note: the aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100° aperture.
similar words(2)
very small aperture terminal
angular aperture
| for Vocabulary Exams of KPDS, YDS,UDS (in Turkey); and SAT in America |
aperture
Hole.
Hole.
| JM Welsh <=> English Dictionary |
Gag
Gag = n. an aperture, a cleft
Gag = n. an aperture, a cleft
Gorel
Gorel = n. an aperture
Gorelu
Gorelu = v. to make an aperture
APERTURE Definition from Medicine Dictionaries & Glossaries
| Dictionary of Medicine (Shahram) |
aperture
noun
hole
noun
hole
APERTURE Definition from Entertainment & Music Dictionaries & Glossaries
| film and video |
Aperture
A variable opening inside a lens that regulates the amount of light reaching the image plane. Also known as an iris. (Camera/Lighting)
A variable opening inside a lens that regulates the amount of light reaching the image plane. Also known as an iris. (Camera/Lighting)
| English to Federation-Standard Golic Vulcan |
Aperture
sharu
sharu
APERTURE Definition from Science & Technology Dictionaries & Glossaries
| Telecommunication Standard Terms |
aperture
1. In a directional antenna, the portion of a plane surface very near the antenna normal to the direction of maximum radiant intensity, through which the major part of the radiation passes. (188 ) 2. In an acoustic device that launches a sound wave, the passageway, determined by the size of a hole in the inelastic material and the wavelength. [After 2196]
1. In a directional antenna, the portion of a plane surface very near the antenna normal to the direction of maximum radiant intensity, through which the major part of the radiation passes. (188 ) 2. In an acoustic device that launches a sound wave, the passageway, determined by the size of a hole in the inelastic material and the wavelength. [After 2196]
| Satellite TV Glossary |
Dish Aperture
The diameter or aperture of a satellite receive dish determines the amount of signal collected from a communication satellite. The larger the aperture, the more signal is intercepted and therefore the higher the gain. The aperture of a prime focus dish can be partially blocked by the feed/LNB and its support structure. For this reason, offset fed antennas are more efficient at the lower end of dish apertures, less than about 1 meter.
The diameter or aperture of a satellite receive dish determines the amount of signal collected from a communication satellite. The larger the aperture, the more signal is intercepted and therefore the higher the gain. The aperture of a prime focus dish can be partially blocked by the feed/LNB and its support structure. For this reason, offset fed antennas are more efficient at the lower end of dish apertures, less than about 1 meter.
| RF Electronics |
Aperture
Same as "diameter" of a parabolic dish.
Same as "diameter" of a parabolic dish.
APERTURE Definition from Sports Dictionaries & Glossaries
| maritime&shipping&trade |
Aperture
An opening cut into a solid structure, as with the propeller aperture cut into the stern deadwood, rudder blade, or sternpost, to accept a centerline-mounted propeller.
An opening cut into a solid structure, as with the propeller aperture cut into the stern deadwood, rudder blade, or sternpost, to accept a centerline-mounted propeller.
APERTURE Definition from Arts & Humanities Dictionaries & Glossaries
| English-Latin Online Dictionary |
aperture
foramen
foramen
APERTURE Definition from Computer & Internet Dictionaries & Glossaries
| Digital Video (DV) & video edit terms / Eng2Eng v1.0 (web compilation) |
APERTURE
Effective Aperture: The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background, such as a sky. Picture Aperture: The rectangular opening in a metal plate at which each frame of the motion picture film is situated during exposure, printing, or projection. Relative Aperture: The ratio of the focal length of a lens to its effective aperture for an object located at infinity. See f/number.
Effective Aperture: The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background, such as a sky. Picture Aperture: The rectangular opening in a metal plate at which each frame of the motion picture film is situated during exposure, printing, or projection. Relative Aperture: The ratio of the focal length of a lens to its effective aperture for an object located at infinity. See f/number.
Aperture
In any type of camera, light is focused by the lens, through an aperture and onto the focal plane. The size of the aperture controls how much light passes through to the focal plane. In addition to controlling the brightness of the exposure, the aperture controls the depth of field in the image. By balancing the size of the aperture (as measured in f-stops) with the shutter speed you can trade off between varying depth of field, and or the ability to better-resolve fast motion.
| Steve's Digicams Digital Camera Dictionary |
Aperture
The lens opening formed by the iris diaphragm inside the lens.
The lens opening formed by the iris diaphragm inside the lens.
APERTURE Definition from Religion & Spirituality Dictionaries & Glossaries
| Webart Magic Astronomical Glossary |
Aperture
The diameter of the light-gathering objective in a telescope.
The diameter of the light-gathering objective in a telescope.
APERTURE Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Aperture
In optics, an aperture is a hole or an opening through which light is admitted. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane.
An optical system typically has many openings, or structures that limit the ray bundles (ray bundles are also known as pencils of light). These structures may be the edge of a lens or mirror, or a ring or other fixture that holds an optical element in place, or may be a special element such as a diaphragm placed in the optical path to limit the light admitted by the system. In general, these structures are called stops, and the aperture stop is the stop that determines the ray cone angle, or equivalently the brightness, at an image point.
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