Method and apparatus for monitoring optical fiber concentricity

Details Method and apparatus for monitoring optical fiber concentricity Method and apparatus for monitoring optical fiber concentricity

1985-03-19

1986-04-22

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356431, G01N 2189

Patent

active

045838518

ABSTRACT:
The eccentricity of an optical fiber core within a transparent fiber jacket is monitored by directing light towards the fiber and obtaining a returned light intensity profile as a function of the angle at which light is returned from the fiber. Any deviation from symmetry of the profile is an indication of eccentricity of the fiber core within the jacket. The method can be used for in-line monitoring when producing fiber with an extruded jacket. The technique is substantially simpler than known techniques which require the use of coherent light for generation of optical fringes.

REFERENCES:
patent: 3069964 (1962-12-01), Simon
patent: 3709610 (1973-01-01), Kruegle
patent: 4042723 (1977-08-01), Presby
patent: 4269514 (1981-05-01), Vossberg

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