Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1995-03-01
1997-04-29
Pascal, Robert
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360105, 360109, 360114, G11B 1110, G11B 502
Patent
active
056256078
ABSTRACT:
A magneto-optical disk apparatus performs at least one of recording and reproduction of information with a magneto-optical recording medium having a disk shape. The magneto-optical disk apparatus comprises an optical device for irradiating the medium with a light beam and a first magnetic field applying device for applying a magnetic field modulated according to information to a portion on the medium which is irradiated with the light beam. The first magnetic field applying device comprises a magnetic head for generating a magnetic field and a floating-type slider for supporting the magnetic head. The apparatus further comprises a second magnetic field applying device, arranged parrallel to the first magnetic field applying device along a surface of the recording medium, for applying a constant magnetic field to the irradiated portion on the medium. The second magnetic field applying device comprises a core member of a substantial ring shape having a gap in a portion thereof and a coil wound around a portion of the core member. The core member has two ends located on either side of the medium such that the gap is positioned at the beam irradiated portion. The apparatus further comprises a moving device for moving the first and second magnetic field applying devices and the optical device together in a radial direction of the medium.
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Patent Abstracts of Japan, Kokai No. 57-110069, vol. 6, No. 200, Oct. 1982.
Canon Kabushiki Kaisha
Kinkead Arnold
Pascal Robert
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