Apparatus for photoelectric detection of objects

Details Apparatus for photoelectric detection of objects Apparatus for photoelectric detection of objects

1983-06-06

1986-04-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 250239, 340555, G01V 904

Patent

active

045815267

ABSTRACT:
The invention comprises a unit (1) implemented with two elongate chambers (3, 4) provided with openings or gaps (7, 8) on one wall (5, 6). At one end of one chamber one or more LED (9) are adapted, and opposite hereto at the end of the other chamber there is arranged a receiving means (10). After one or more reflections by the reflecting walls of the first chamber (3) the radiation departs through the opening or gap (7) and after reflection by an object (13) on the outside returns through the gap (8) of the other chamber (4), to be reflected by the mirror walls of the chamber such as to strike the receiving means (10) after reflection.

REFERENCES:
patent: 4042821 (1977-08-01), Mierzwinski
patent: 4336993 (1982-06-01), Banton
patent: 4434363 (1984-02-01), Yorifuji et al.

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