Magneto-optical reproducing method using a plurality of...

Details Magneto-optical reproducing method using a plurality of... Magneto-optical reproducing method using a plurality of...

2005-06-07

2005-06-07

Dinh, Tan (Department: 2653)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

C369S013080, C369S013100, C369S013280

Reexamination Certificate

active

06904002

ABSTRACT:
A magneto-optical recording medium has magneto-optical recording layers (11, 12, 13) and reproducing layers (21, 22, 23). The information recorded in the reproducing layers are reproduced by means of reproducing light beams (31, 32, 33) of different wavelengths, respectively. In reproduction, magnetic domains (4) recorded in the recording layers are transferred in the reproducing layers formed on the respective recording layers, the transferred magnetic domains (5) are enlarged with an external magnetic field, and the information is reproduced. Since information is recorded and reproduced for each recording layer, the recording density is improved. Further since the reproduction signals are amplified by the magnetic domain enlargement, the C/N is improved.

REFERENCES:
patent: 4807204 (1989-02-01), Mizutani et al.
patent: 5197049 (1993-03-01), Wehrenberg
patent: 5923625 (1999-07-01), Shimazaki et al.
patent: 5995472 (1999-11-01), Fujii et al.
patent: 6388954 (2002-05-01), Awano et al.

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