Magneto-optical recording apparatus capable of both magnetic mod

Details Magneto-optical recording apparatus capable of both magnetic mod Magneto-optical recording apparatus capable of both magnetic mod

1994-08-31

1995-07-18

Nguyen, Hoa T.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 66, 360 59, G11B 1304

Patent

active

054348315

ABSTRACT:
Disclosed is a magneto-optical recording apparatus for recording an information signal on or for erasing an information signal from magneto-optical recording media by irradiating the magneto-optical recording media with a beam of light while applying a magnetic field thereto. The magneto-optical recording apparatus includes, as a magnetic field application device, a composite magnetic head which includes a first magnetic head capable of modulating a generated magnetic field in accordance with an information signal, and a second magnetic head capable of generating a constant magnetic field which is not associated with the information signal and capable of switching the direction of the constant magnetic field. This provides a magneto-optical recording apparatus which can use magneto-optical recording media for both light modulation type recording and magnetic field modulation type recording, and which ensures overwriting without increasing the overall size of the apparatus.

REFERENCES:
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patent: 4910622 (1990-03-01), Saito et al.
patent: 4959820 (1990-09-01), Horimai et al.
patent: 5043960 (1991-08-01), Nakao et al.
patent: 5202863 (1993-04-01), Miyatake et al.
patent: 5278809 (1994-01-01), Ogata
Patent Abstracts of Japan, Kokai No. 63-86130, vol. 12, No. 323, Sep. 1988.
Nakao et al., "High Speed Overwritable Magneto-Optic Recording," Japanese Journal of Applied Physics, vol. 26, (1987), Supplement 26-4.

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