Optical information recording-reproducing apparatus

Details Optical information recording-reproducing apparatus Optical information recording-reproducing apparatus

1989-08-29

1991-04-23

McElheny, Jr., Donald

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

235454, 235476, 369 4426, G11B 700

Patent

active

050105345

ABSTRACT:
There is disclosed an optical card recorder-reader, in which erroneous signal recording, caused by a low-level light beam when it is stopped at a position for a prolonged period between writing and/or reading operation, either by interruping the irradiation, or by reducing the power of irradiation, or by placing the light beam outside the recording area, when the recording or reading operation is not in progress.

REFERENCES:
patent: 4094010 (1978-06-01), Pepperl et al.
patent: 4121249 (1978-10-01), Lemelson
patent: 4419750 (1983-12-01), Howe
patent: 4769802 (1988-09-01), Tatsduguchi
Drexon Laser Memory Card Equipment Development and Licensing Program Quarterly Report No. 3, Jul. 22, 1983, pp. 1-30.
Drexon Laser Memory Card Equipment Development and Licensing Program Quarterly Report No. 4, Oct. 27, 1983, pp. 1-37.
Abstract of Japanese 55-43681, Mar. 1980.

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