Process and device for simultaneously measuring the geometrical

Details Process and device for simultaneously measuring the geometrical Process and device for simultaneously measuring the geometrical

1983-05-13

1986-01-07

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

G01B 1112

Patent

active

045630879

ABSTRACT:
The invention relates to a process and device for measuring the optical core - mechanical sheath concentricity and the optical core ellipticity of an optical fibre. The process consists of injecting a light beam into a fibre, which has been previously bared at one of its ends. The analysis of the near field of this fibre by a detector performing a relative rotary movement with respect to said fibre provides details on the core - sheath concentricity and the core ellipticity, by carrying out a narrow band detection at the rotational frequency and at double its frequency.

REFERENCES:
patent: 4299491 (1981-11-01), Waters et al.

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