Signal reproducing systems employing a semiconductive light sour

Details Signal reproducing systems employing a semiconductive light sour Signal reproducing systems employing a semiconductive light sour

1975-02-04

1977-01-25

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358130, 1791003Z, 1791003V, 250552, 250570, 357 18, G11B 700, H01S 310

Patent

active

040052591

ABSTRACT:
A signal reproducing system using light for reproducing video or other information signals recorded on a recording medium, such as a rotatable disc, employs a semiconductor diode laser for directing the light to the recording medium which has reflective portions and nonreflective portions representing the recorded signals. A cleavage face of the semiconductor diode has an antireflecting coating through which the light is directed toward the recording medium so that the semiconductor diode laser emits laser light only when the semiconductor diode laser receives the reflection from the reflective portions of the recording medium, and a transducer receives the laser light emitted from another cleavage face of the semiconductor diode laser to reproduce the recorded signals in response to the emitted laser light.

REFERENCES:
patent: 3798386 (1974-03-01), Dickopp
patent: 3941945 (1976-03-01), Borner

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