Patent
1983-03-28
1985-09-10
Arnold, Bruce Y.
350 9619, G02B 514, G02B 532
Patent
active
045402469
ABSTRACT:
Apparatus for optically coupling a plurality of optical fibers in predetermined combinations. Each optical fiber fits into and is supported by an expanded-beam type optical component that is optically structured to collimate, or nearly collimate, the output from an optical fiber when the fiber is located at, or nearly at, the focus of the optical component. The optical components fit into a housing that is adapted to receive and support them such that at least one of the components is nominally aimed in a first direction and the other optical components are nominally aimed in a direction different from the first direction. The housing includes optical means, including a holographic layer or layers, of predetermined size positioned within the housing to intercept the output from the optical component aimed in the first general direction and precisely direct it into predetermined ones of the other optical components aimed generally differently thereto and to precisely direct the output from any of the similarly aimed optical components into the end of the fiber located in the optical component aimed in the first direction. The apparatus permits the tolerances related to the angular tilt of the lens surfaces of such optical components to be greatly relaxed compared to what they would otherwise need to be to have the same throughput from fiber to fiber when used without the apparatus of the invention.
REFERENCES:
patent: 3497283 (1970-02-01), Law
patent: 3622220 (1971-11-01), Kogelnik
patent: 4057319 (1977-11-01), Ash et al.
patent: 4359259 (1982-11-01), Horner et al.
patent: 4387955 (1983-06-01), Ludman et al.
patent: 4398792 (1983-08-01), Horner et al.
Sincerbox, "Formation of Optical Elements by Holography," IBM Technical Disclosure Bulletin, Aug. 1967.
Arnold Bruce Y.
Caufield Francis J.
Polaroid Corporation
Shapiro Bruce S.
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