| numerical aperture |
The numerical aperture (NA) of an optical fibre defines the characteristic of the fibre in terms of its acceptance of impinging light. It can be calculated and expressed as an index (a number). The higher the number the more light than can be accepted.
출처: www.aefos.com/html/glossary/n.htm
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| numerical aperture |
The "light gathering ability" of a fiber, defining the maximum angle to the fiber axis at which light will be accepted and propagated through the fiber. NA=sinq, where q is the acceptance angle. NA also is used to describe the angular spread of light from a central axis, as in exiting a fiber, emitting from a source, or entering a detector.
출처: www.point-source.com/glossary.asp
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| numerical aperture |
The sine of the acceptance angle of a fibre multiplied by the refractive index of the medium from which the light is entering (air = 1).
출처: www.fibreoptech.co.uk/glossary.asp
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| numerical aperture |
The number that expresses the light gathering ability of a fiber. Related to acceptance angle.
출처: www.cetpak.com/Technical/glossary.htm
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| numerical aperture |
The ability of a lens to resolve fine detail in an object being observed. It is related to the aperture of the lens and the index of refraction of the medium found between the lens and the specimen.
출처: www.themicroscopesite.com/microscope-glossary3.htm
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