Device for displaying the core of an optical fiber

Details Device for displaying the core of an optical fiber Device for displaying the core of an optical fiber

1992-03-11

1993-10-12

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356390, G01N 2184, G01B 1112

Patent

active

052530345

ABSTRACT:
A device for displaying the core (C) of an optical fiber (F) in two directions that are transverse to the fiber (F) includes two light sources illuminating the fiber. Each source emits a beam of light. The beams have different directions D.sub.1 and D.sub.2. The directions lie in a plane that is orthogonal to the longitudinal axis (X) of the fiber (F). An objective lens (L.sub.3, L.sub.4), reception and display components (2, 3) are employed and receive and display images of the fiber (F) produced by the beams. The objective lens is focused in a plane (P) that intercepts the beams from the fiber (F) inside the fiber (F). The angle (.alpha..sub.1, .alpha..sub.2) between either of the directions (D.sub.1, D.sub.2) and the focal axis (Y) of the objective lens (L.sub.3, L.sub.4) is such that the objective lens (L.sub.3, L.sub.4) directly receives the two beams from the fiber (F) with sufficient light intensity to enable the display component to operate.

REFERENCES:
patent: 4362943 (1982-12-01), Presby
Journal of Lightwave Technology, vol. LT-2, No. 2, Apr. 1984, pp. 185-191, New York, US; O. Kawata et al.: "A splicing and inspection technique for single-mode fibers using direct core monitoring".
Patent Abstracts of Japan, Database JAPS/JPO, vol. 9, No. 210 (P383), Aug. 28, 1985; & JP-A-60070407 (Sumitomo) Apr. 22, 1985.
Patent Abstracts of Japan, Database JAPS/JPO, vol. 9, No. 174 (P374), Jul. 19, 1985; & JP-A-60049307 (Nippon Denshin) Mar. 18, 1985.

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