Abbe number

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Abbe number

[′ä·bə ‚nəm·bər]
(optics)
A number which expresses the deviating effect of an optical glass on light of different wavelengths.
References in periodicals archive ?
When the V-number of the fiber falls below one, the optical field, which was originally contained in the core, spreads into the cladding.
when this happens, that is, when the index of refraction of the core is decreased and the size is increased, the V-number stays roughly the same.
6,20] When this happens, that is, when the index of refraction of the core is decreased and the size is increased, the V-number stays roughly the same.