Magneto-optical disk having cellularly divided regions with alte

Details Magneto-optical disk having cellularly divided regions with alte Magneto-optical disk having cellularly divided regions with alte

1995-11-02

1997-07-01

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369116, 360114, G11B 1100

Patent

active

056445563

ABSTRACT:
A magneto-optical disk is of a type in which magnetic record pits are formed by thermomagnetic recording on a magnetic member and the pits are read utilizing the photomagnetic effect. The disk has cellularly divided regions arranged along a track direction on both sides of an information track on which a signal pit string is formed. The divided regions have alternately changing directions of magnetization. The magneto-optical disk is magnetized such that a focused laser beam is irradiated on the disk and an alternating magnetic field is applied to a portion irradiated by the laser beam.

REFERENCES:
patent: 5014254 (1991-05-01), Van Rosmalen et al.
patent: 5065377 (1991-11-01), Spruit et al.
patent: 5077714 (1991-12-01), Katayama et al.
patent: 5126985 (1992-06-01), Spruit et al.
patent: 5295121 (1994-03-01), Sukeda et al.
patent: 5323366 (1994-06-01), Watada et al.
patent: 5371721 (1994-12-01), Greidanus et al.

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