Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1998-07-07
2000-05-30
Dinh, Tan
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
G11B 1100
Patent
active
060698527
ABSTRACT:
A method for recording information on a domain wall displacement type magneto-optical medium comprises forming a magnetic domain such that the magnetic domain is asymmetrical with regard to a center line of a land portion or a groove portion in a tangential direction of the magneto-optical medium perpendicular to a radial direction of the magneto-optical medium. A method for reproducing information recorded by the method for recording information comprises projecting a light spot a center of which light spot, is positioned in one side of the land portion or the groove portion divided by the center line of the land portion or the groove portion from the other side, in which other side a curvature center of a domain wall of the magnetic domain exists, moving the light spot along the land portion or the groove portion, and reproducing information from the magnetic domain by a change of polarization direction of reflected light of the light spot.
REFERENCES:
patent: 5459701 (1995-10-01), Tokita et al.
patent: 5555236 (1996-09-01), Hasegawa
patent: 5740133 (1998-04-01), Tamanoi et al.
Miyaoka Yasuyuki
Yoshida Hiroshi
Canon Kabushiki Kaisha
Dinh Tan
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