Magnetooptic recording member having selectively-reversed erasur

Details Magnetooptic recording member having selectively-reversed erasur Magnetooptic recording member having selectively-reversed erasur

1988-08-10

1990-04-10

Stephan, Steven L.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360131, 369 47, 369 48, G11B 1304, G11B 1505

Patent

active

049166808

ABSTRACT:
In a magnetooptic record member the erasure direction for successive recording areas (sectors) are determined by the direction of magnetization of prior recording. A mark is placed in each sector for identifying its erasure direction. The mark is preferably a sequence of longer ones, of one-half wavelengths appearing in the recorded information-bearing signals. The erasure and recording directions are reversed such that in the recording direction in a successive recording area equal to the erasure direction of a proceeding area. This selection is based upon the current direction of a magnetic steering field.

REFERENCES:
patent: 3641526 (1972-02-01), Bailey et al.
patent: 3821703 (1974-06-01), Irwin et al.
patent: 4412264 (1983-10-01), Imamura
patent: 4539662 (1985-09-01), Hatano
patent: 4688203 (1987-08-01), Koishi et al.
patent: 4688204 (1987-08-01), Noyes, Jr. et al.
patent: 4712203 (1987-12-01), Saito et al.
patent: 4730289 (1988-03-01), Saitoh et al.
patent: 4789972 (1988-12-01), Oldham
"Modern Science Dictionary", compiled by A. Hechtlinger, Bronx High School of Science, Copyright 1959 by Franklin Publishing Company, Inc., Palisade, N.J.

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