Optoelectronic circuit element

Details Optoelectronic circuit element Optoelectronic circuit element

1978-05-31

1981-03-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250227, G01V 904

Patent

active

042543339

ABSTRACT:
In an optoelectronic circuit element for effecting a manually controlled output signal comprising at least one radiation-emitting element, a radiation-propagating unit and at least one radiation-sensitive element, the radiation-propagating unit being a solid body which is transparent to the radiation in question and which has an interface which is exposed to radiation from the radiation-propagating unit, an identifiable change in the state of the radiation-sensitive element is effected by changes in the conditions for total internal reflection of the radiation at the interface arising from contact of an actuating body, say a finger, with said interface.

REFERENCES:
patent: 3673327 (1972-06-01), Johnson et al.
patent: 4068222 (1978-01-01), Treviranus

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