Photoelectric sensor having a light guide built-in

Details Photoelectric sensor having a light guide built-in Photoelectric sensor having a light guide built-in

1996-05-23

1998-06-16

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250551, 257435, H01J 516, H01L 2974

Patent

active

057675082

ABSTRACT:
In a photoelectric sensor, a photosensitive device is mounted on a substrate and outputs an electric signal corresponding to light incident thereto. A casing holds the substrate in a bore formed therein and includes a light guide portion formed of an optically transparent material for conducting incident light to the photosensitive device. A light emitting device is also mounted on the substrate for emitting light in response to a current input thereto. A seal member is molded to air-tightly seal the light emitting device and photosensitive device except for a light guide portion included in the light emitting device and a light guide portion included in the photosensitive device.

REFERENCES:
patent: 4677454 (1987-06-01), Kiyuhara
patent: 4785338 (1988-11-01), Kinoshita et al.
patent: 4933729 (1990-06-01), Soejima et al.
patent: 4978843 (1990-12-01), Yamakawa
patent: 5105239 (1992-04-01), Uchino et al.
patent: 5189716 (1993-02-01), Matsubara et al.
patent: 5436472 (1995-07-01), Ogawa

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