Optical sensor and method of making same

Details Optical sensor and method of making same Optical sensor and method of making same

1987-11-09

1989-01-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, 350320, H01J 516

Patent

active

047975490

ABSTRACT:
An optical sensor has a gap for a toothed modulator wheel and accurately aligned optical fibers on either side of the gap. The fibers form a U-shape to allow compact sensor design. The sensor is fabricated by inserting a single optical fiber in a mold and supporting the fiber in a U-shape such that the bottom of the U bend includes a straight portion. A thermosetting material is molded around the fiber to form a body and encapsulsate the fiber. A gap is formed by excluding or removing the resin from the region of the straight portion. A part of the straight portion of the fiber at the gap is removed so that the remaining spaced ends are inherently aligned across the gap.

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patent: 4430566 (1984-02-01), Searle
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patent: 4634857 (1987-01-01), Fey
patent: 4645923 (1987-02-01), De Blok et al.
patent: 4664732 (1987-05-01), Cambell et al.
patent: 4682842 (1987-07-01), Mahlein et al.
patent: 4733933 (1988-03-01), Pikulski

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