Optical apparatus

Details Optical apparatus Optical apparatus

1975-11-06

1978-07-25

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

350 9610, 356256, G02B 2700

Patent

active

041025792

ABSTRACT:
An optical apparatus for use in association with an optical fibre having a core member and a cladding member which surrounds the core member and which has a refractive index less than the refractive index of the core member, the apparatus including optical means adapted to examine light radiated at an angle through the cladding member and thereby determine the characteristics of the optical fibre and/or facilitate the application of an illuminating beam of light at an angle through the cladding member and to thereby excite a single mode in the optical fibre; and means for maintaining the angle between the light and the fibre axis substantially constant.

REFERENCES:
patent: 3311845 (1967-03-01), Koester
patent: 3584230 (1971-06-01), Tien
patent: 3617109 (1971-11-01), Tien
patent: 3777149 (1973-12-01), Marcatili
patent: 3936142 (1976-02-01), Kersten
Snyder et al., "Leaky Rays on Circular Optical Fibers", JOSA vol. 64, No. 5, (May 1974), pp. 599-607.
Snyder et al. "Failure of Geometric Optics for Analysis of Circular Optical Fibers", JOSA vol. 65, No. 5 (May 1974), pp. 608-614.

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