Reflection-type photoelectric switching apparatus

Details Reflection-type photoelectric switching apparatus Reflection-type photoelectric switching apparatus

1979-06-11

1981-08-04

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250239, G01V 904

Patent

active

042824303

ABSTRACT:
A reflection-type photoelectric switching apparatus for providing an electric switching signal indicating existance information of an object to be detected thereby comprising a light projecting device for projecting a beam of light to the object, a light receiving photoelectric device arranged in side-by-side relation with the light projecting device for receiving a reflected light from the object, an optical axis adjusting means which is controllable from outside of housing of the apparatus for adjusting the optical axes of the light projecting and receiving devices, and optical members which allow both the light beam from the projecting device and the light beam to be incident on the receiving device to pass within a predetermined light path so that the two light beams will be crossed in a desired detection field, the distance from the apparatus to the desired detection field being continuously variable by the optical axis adjusting means.

REFERENCES:
patent: 3002420 (1961-10-01), Willits et al.
patent: 3435744 (1969-04-01), Stimson
patent: 3620625 (1971-11-01), Tegholm
patent: 3697762 (1972-10-01), Kurtz
patent: 3740562 (1973-06-01), Fertig
patent: 3817631 (1974-06-01), Kawahara
patent: 4051365 (1977-09-01), Fukuyama

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