numerical aperture - definitie. Wat is numerical aperture
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Wat (wie) is numerical aperture - definitie

DIMENSIONLESS NUMBER THAT CHARACTERIZES THE RANGE OF ANGLES OVER WHICH THE SYSTEM CAN ACCEPT OR EMIT LIGHT
Numerical Aperture; Numerical apertures; Numerical aperture (optical fiber); Numerical aperture (microscopy); Numerical aperture of optical telecommunication fiber

Aperture         
  • The aperture range of a 50mm Minolta lens, f/1.4–f/16
  • Aperture icon
  • Thomas Blount]], ''Glossographia Anglicana Nova: Or, A Dictionary, Interpreting Such Hard Words of whatever Language, as are at present used in the English Tongue, with their Etymologies, Definitions, &c. Also, The Terms of Divinity, Law, Physick, Mathematics, History, Agriculture, Logick, Metaphysicks, Grammar, Poetry, Musick, Heraldry, Architecture, Painting, War, and all other Arts and Sciences are herein explain'd, from the best Modern Authors, as, Sir Isaac Newton, Dr. Harris, Dr. Gregory, Mr. Lock, Mr. Evelyn, Mr. Dryden, Mr. Blunt, &c.'', London, 1707.</ref>
  • Diagram of decreasing aperture sizes (increasing [[f-number]]s) for "full stop" increments (factor of two aperture area per stop)
  • Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades
  • A camera aperture
  • Alvin Clark polishes the big [[Yerkes Observatory]] [[Great Refractor]] objective lens, with 40 inches 102&nbsp;cm across, in 1896.
HOLE OR OPENING THROUGH WHICH LIGHT TRAVELS
Aperture stop; Aperture Stop; Apertures; Lens aperture; Aperature; Aperture factor; Apature; Optimal aperture; Clear aperture; Aperture (optics)
·noun The act of Opening.
II. Aperture ·noun An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
III. Aperture ·noun The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
aperture         
  • The aperture range of a 50mm Minolta lens, f/1.4–f/16
  • Aperture icon
  • Thomas Blount]], ''Glossographia Anglicana Nova: Or, A Dictionary, Interpreting Such Hard Words of whatever Language, as are at present used in the English Tongue, with their Etymologies, Definitions, &c. Also, The Terms of Divinity, Law, Physick, Mathematics, History, Agriculture, Logick, Metaphysicks, Grammar, Poetry, Musick, Heraldry, Architecture, Painting, War, and all other Arts and Sciences are herein explain'd, from the best Modern Authors, as, Sir Isaac Newton, Dr. Harris, Dr. Gregory, Mr. Lock, Mr. Evelyn, Mr. Dryden, Mr. Blunt, &c.'', London, 1707.</ref>
  • Diagram of decreasing aperture sizes (increasing [[f-number]]s) for "full stop" increments (factor of two aperture area per stop)
  • Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades
  • A camera aperture
  • Alvin Clark polishes the big [[Yerkes Observatory]] [[Great Refractor]] objective lens, with 40 inches 102&nbsp;cm across, in 1896.
HOLE OR OPENING THROUGH WHICH LIGHT TRAVELS
Aperture stop; Aperture Stop; Apertures; Lens aperture; Aperature; Aperture factor; Apature; Optimal aperture; Clear aperture; Aperture (optics)
(apertures)
1.
An aperture is a narrow hole or gap. (FORMAL)
Through the aperture he could see daylight.
N-COUNT
2.
In photography, the aperture of a camera is the size of the hole through which light passes to reach the film.
N-COUNT
aperture         
  • The aperture range of a 50mm Minolta lens, f/1.4–f/16
  • Aperture icon
  • Thomas Blount]], ''Glossographia Anglicana Nova: Or, A Dictionary, Interpreting Such Hard Words of whatever Language, as are at present used in the English Tongue, with their Etymologies, Definitions, &c. Also, The Terms of Divinity, Law, Physick, Mathematics, History, Agriculture, Logick, Metaphysicks, Grammar, Poetry, Musick, Heraldry, Architecture, Painting, War, and all other Arts and Sciences are herein explain'd, from the best Modern Authors, as, Sir Isaac Newton, Dr. Harris, Dr. Gregory, Mr. Lock, Mr. Evelyn, Mr. Dryden, Mr. Blunt, &c.'', London, 1707.</ref>
  • Diagram of decreasing aperture sizes (increasing [[f-number]]s) for "full stop" increments (factor of two aperture area per stop)
  • Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades
  • A camera aperture
  • Alvin Clark polishes the big [[Yerkes Observatory]] [[Great Refractor]] objective lens, with 40 inches 102&nbsp;cm across, in 1896.
HOLE OR OPENING THROUGH WHICH LIGHT TRAVELS
Aperture stop; Aperture Stop; Apertures; Lens aperture; Aperature; Aperture factor; Apature; Optimal aperture; Clear aperture; Aperture (optics)
['ap?t??, -tj(?)?]
¦ noun an opening, hole, or gap.
?the variable opening by which light enters a camera.
Origin
ME: from L. apertura, from apert-, aperire 'to open'.

Wikipedia

Numerical aperture

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 accept or emit light. By incorporating index of refraction in its definition, NA has the property that it is constant for a beam as it goes from one material to another, provided there is no refractive power at the interface. The exact definition of the term varies slightly between different areas of optics. Numerical aperture is commonly used in microscopy to describe the acceptance cone of an objective (and hence its light-gathering ability and resolution), and in fiber optics, in which it describes the range of angles within which light that is incident on the fiber will be transmitted along it.