Reflection type photoelectric switch

Details Reflection type photoelectric switch Reflection type photoelectric switch

1989-04-26

1990-05-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250561, G01N 2186

Patent

active

049260499

ABSTRACT:
A reflection type photoelectric switch adapted to project light to an object to be detected and sense the object on the basis of reflected light therefrom, which comprises a split-type composite light receiving unit consisting of two light receiving segments, a differential amplifer receiving the outputs of the two light receiving segments, and a waveform shaping device for discriminating the differential amplification output of the differential amplifier with a predetermined level and generating a detection output for the object.

REFERENCES:
patent: 3423597 (1969-01-01), Delp
patent: 3644739 (1972-02-01), Wilkinson et al.
patent: 3723748 (1973-03-01), Coburn et al.
patent: 4142105 (1979-02-01), Erdman
patent: 4683380 (1987-07-01), Shipkowski et al.
Patent Abstracts of Japan, vol. 10, No. 237 (P-487) [2293], Aug. 15, 1986; & JP-A 6170 404 (TOYO KIKAI K.K.) 11-04-1986 Abstract.
Patent Abstracts of Japan, vol. 8, No. 254 (P-315) [1691], Nov. 21, 1984; & JP-A-59 125 018 (MATSUSHITA DENKO K.K.) 19-07-1984 Abstract.

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