Optical memory playback apparatus

Details Optical memory playback apparatus Optical memory playback apparatus

1978-06-26

1980-02-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250211J, G06K 710

Patent

active

041907752

ABSTRACT:
Disclosed is an optical memory playback apparatus using an electroluminescent semiconductor element as a combination light source and sensor, which apparatus permits information in an information storage medium to be reproduced in the form of variation in electrical characteristics of the semiconductor element by causing a beam of light issuing from the electroluminescent semiconductor element to be directed to the information storage medium, allowing the light reflected by the information storage medium to impinge on the semiconductor element for thereby inducing variation in the optical and electrical characteristics of the semiconductor element owing to the self-coupling effect.

REFERENCES:
patent: 3715733 (1973-02-01), Feiner et al.
patent: 3775757 (1973-11-01), Taylor et al.
patent: 3812477 (1974-05-01), Wieder
patent: 3941945 (1976-03-01), Borner
patent: 4005259 (1977-01-01), Kaneko

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