Associations to the word «Aperture»

APERTURE, noun. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.

APERTURE, noun. (optics) Something which restricts the diameter of the light path through one plane in an optical system.

APERTURE, noun. (astronomy) (photography) The diameter of the aperture (in the sense above) which restricts the width of the light path through the whole system. For a telescope, this is the diameter of the objective lens. e.g. a telescope may have a 100   cm aperture.

APERTURE, noun. (spaceflight) (communications) The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.

APERTURE, noun. (mathematics) (rare) (of a right circular cone) The maximum angle between the two generatrices.

APERTURE MEMBRANE, noun. (palynology) Section of exine forming the base of an aperture

APERTURE PRIORITY, noun. (photography) (often used attributively) A setting in many professional-grade and advanced-amateur-grade cameras which allows a photographer to manually set the aperture setting of an exposure while the camera then automatically selects the correct shutter speed for that exposure.

APERTURE, noun. A device that controls amount of light admitted.

APERTURE, noun. A natural opening in something.

APERTURE, noun. An man-made opening; usually small.