System and method for inspecting an optical fiber including an e

Details System and method for inspecting an optical fiber including an e System and method for inspecting an optical fiber including an e

1998-07-28

1999-11-30

Ratliff, Reginald A.

Optics: measuring and testing

For optical fiber or waveguide inspection

356237, G01N 2100

Patent

active

059952121

ABSTRACT:
A system and method for inspecting an optical fiber, particularly an epoxy region of an optical fiber in a supporting structure. The inspection may use an initialization routine including determination of whether the centering between the optical fiber and the illumination source is sufficient. The meters used to determine completion of initialization may be displayed. The inspection may analyze the uniformity of the thickness of an epoxy layer between the fiber and the supporting structure. The inspection may also analyze the core and clad zones of the optical fiber for scratches and other intensity variations, referred to generically as blobs. The core zone preferably encompasses a region larger than the core alone, e.g., an area which is a multiple of the core diameter. Different criteria are established for the core and clad zones, with no discontinuities being tolerated in the core zone. Scratches may be extracted using a windowing technique. The clad zone has a two-dimensional discrimination factor for both scratches and blobs, one dimension being cumulative for a totality of the intensity variations and the other dimension being for each individual intensity variation. The effect of the illumination of the core on the discrimination may be accounted for.

REFERENCES:
patent: 4721357 (1988-01-01), Kovalchick et al.
patent: 4787698 (1988-11-01), Lyons et al.
patent: 5179419 (1993-01-01), Palmquist et al.
patent: 5729622 (1998-03-01), Csipkes et al.
patent: 5809162 (1998-09-01), Csipkes et al.

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