English

Etymology
Latin apertura, from aperire. See Aperient.

Pronunciation
IPA: / �æp.�.t��(r), �æp.�.tj��(r)/
IPA: WEAE /�æp.�.t��/

Noun
en-noun

1. 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. --Gilpin.
#: The back aperture of the nostrils. --Owen.

1. optics Something which restricts the diameter of the light path through one plane in an optical system.
2. context|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.

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.

Translations
trans-top|opening
Finnish: aukko, reikä
trans-mid
Polish: otwór m, szpara f, szczelina f
trans-bottom

trans-top|Something which restricts the diameter of the light path through one plane in an optical system
Czech: clona f
trans-mid
Polish: przes�ona f
trans-bottom

trans-top|diameter of the aperture (in the sense above)
trans-mid
Polish: przys�ona f
trans-bottom

Translations to be checked
checktrans

mid
ttbc|Spanish: apertura f

Italian

Noun
aperture f

1. plural of|apertura|lang=Italian

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• 2007-09-26 19:52 - UllmannBot - iwiki +te

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