Method and apparatus for magneto-optical recording or reproducin

Details Method and apparatus for magneto-optical recording or reproducin Method and apparatus for magneto-optical recording or reproducin

1996-06-27

1998-06-30

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 49, 369 91, G11B 1100

Patent

active

057744289

ABSTRACT:
First, a recording magnetic field is generated by a magnetic head using a coil drive current a.sub.1, and a first data signal is recorded on a groove of a recording layer of a magneto-optical disk. Thereafter, similarly, a second data signal is recorded on the same groove as above by a coil drive current a.sub.2. In this case, the first and second data signals have different signal frequencies which do not overlap each other. The amplitude A.sub.1 of the coil drive current a.sub.1, is set greater than the amplitude A.sub.2 of the coil drive current a.sub.2. This arrangement permits multiple recording and increases the recording capacity of the magneto-optical disk.

REFERENCES:
patent: 5377178 (1994-12-01), Saito et al.
patent: 5602823 (1997-02-01), Aoki et al.

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