Optical information readout apparatus

Details Optical information readout apparatus Optical information readout apparatus

1989-09-27

1992-06-02

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369122, G11B 700

Patent

active

051193612

ABSTRACT:
An optical information readout system including a record medium having a record layer capable of storing information and of reading the same optically, a resonating mirror arranged in substantially parallel to and apart at a predetermined distance from the record medium, a laser medium arranged between the record medium and the resonating mirror, a light source for pumping the laser medium, and a detector for detecting changes in a laser resonance, wherein the information recorded in the record medium is read by utilizing the surface of the recording medium as the other resonating mirror of the laser resonator and by detecting the changes of laser resonance resulted from the changes of the record medium surface by the detector.

REFERENCES:
patent: 4449204 (1984-05-01), Shimada et al.
patent: 4769805 (1988-09-01), Gottfried
patent: 4783152 (1988-11-01), Nishimoto
patent: 4791625 (1988-12-01), Nakamura
patent: 4804835 (1989-02-01), Ando
patent: 4887255 (1989-12-01), Handa et al.

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