Device for detecting a moving body

Details Device for detecting a moving body Device for detecting a moving body

1977-09-15

1979-11-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G02B 514

Patent

active

041752317

ABSTRACT:
A photoguide member having a first end face opposed to the path followed by a moving body and a second end face through which the light having entered through said first end face exits is disposed along the path of the moving body. The photoguide member is formed of a light transmitting material and has a recess formed in the second end face thereof. Light projected on the moving body enters the photoguide member through its first end face and passes through the photoguide member, whereafter the light travels to photodetector disposed in opposed relationship with the recess in the second end face. The body is detected in accordance with the presence of the light passing to the photodetector. The gap between the photoreception surface of the photodetector and the recess may be filled with a light transmitting material.

REFERENCES:
patent: 2275602 (1942-03-01), Beck et al.
patent: 2883649 (1959-04-01), King, Jr.
patent: 3581099 (1971-05-01), Franke

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