Two-way coupler for branched light-transmission network

Details Two-way coupler for branched light-transmission network Two-way coupler for branched light-transmission network

1979-04-24

1981-07-28

Levy, Stewart J.

350 9618, G02B 514

Patent

active

042807514

ABSTRACT:
A branched light-transmission network includes at least one body with a plurality of light-reflecting surfaces meeting in a common point or edge for illumination by a primary light guide, such as a light-conducting filament or foil, emitting a beam which is split among these surfaces into several components directed toward respective secondary light guides. Each reflecting surface is part of an optical system forming two conjugate points respectively coinciding with the centers of the proximal ends of the primary and secondary light guides emitting and collecting the rays reflected by that surface. These conjugate points may be the foci of an ellipse partly defined by the intersection of the reflecting surface with the common axial plane of the associated light guides; alternatively, they are the focal points of two lenses of positive refractivity which define paths of parallel light rays impinging upon and departing from the flat reflecting surface. The arrangement may be inverted to let the secondary light guides illuminate the associated reflecting surfaces for producing a composite beam in the primary light guide.

REFERENCES:
patent: 3453036 (1969-07-01), Swope et al.
patent: 3901582 (1975-08-01), Milton
patent: 4021099 (1977-05-01), Kawasaki et al.
patent: 4078852 (1978-03-01), Lebduska
Lean, "Taps for Multimode Fibers", IBM Tech. Disc. Bull., vol. 21, No. 4, Sep. 1978.

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