Definition of Aperture. Meaning of Aperture. Synonyms of Aperture

Here you will find one or more explanations in English for the word Aperture. Also in the bottom left of the page several parts of wikipedia pages related to the word Aperture and, of course, Aperture synonyms and on the right images related to the word Aperture.

Definition of Aperture

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. --Gilpin. The back aperture of the nostrils. --Owen. 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[deg] aperture.

Meaning of Aperture from wikipedia

- In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine...
- In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can...
- The aperture of an optical system is the opening that limits the amount of light that can p**** through. Aperture may also refer to: In anatomy, a number...
- An aperture grille is one of two major technologies used to manufacture color cathode ray tube (CRT) televisions and computer displays; the other is the...
- The lateral aperture is a paired structure in human anatomy. It is an opening in each lateral extremity of the lateral recess of the fourth ventricle of...
- Aperture priority, often abbreviated A or Av (for aperture value) on a camera mode dial, is a setting on some cameras that allows the user to set a specific...
- the system's focal length to the diameter of the entrance pupil ("clear aperture"). It is also known as the focal ratio, f-ratio, or f-stop, and is very...
- The median aperture (also known as the medial aperture, and foramen of Magendie) drains cerebrospinal fluid (CSF) from the fourth ventricle into the cisterna...
- or ring. Open sights use a notch of some sort as the rear sight, while aperture sights use some form of a circular hole. Civilian, hunting, and police...
- The angular aperture of a lens is the angular size of the lens aperture as seen from the focal point: a = 2 arctan ⁡ ( D / 2 f ) = 2 arctan ⁡ ( D 2 f...
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