Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1989-08-04
1992-08-18
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 360 66, 360 60, G11B 1304, G11B 1112
Patent
active
051405687
ABSTRACT:
A photomagnetic recording apparatus comprises an optical pickup movable with reference to a photomagnetic recording medium to irradiate an optical beam toward a predetermined region of the photomagnetic recording medium, and a magnetic field-generating mechanism for applying a uniform magnetic field to that predetermined region of the optical magnetic recording medium which is irradiated with the optical beam. The magnetic field-generating mechanism includes a yoke, at least one arm portion supported by the yoke, a coil winding held by the at least one arm portion, and a recording medium-facing member supported by the at least one arm and having end portions extending from the coil winding in the direction in which the optical pickup is movable. The yoke, at least one arm portion, and the recording medium-facing member are made from a magnetic material.
REFERENCES:
patent: 4531170 (1985-07-01), Takei et al.
patent: 4775909 (1988-10-01), Inoue et al.
patent: 4825428 (1989-04-01), Toki
patent: 4849952 (1989-07-01), Shiho
Levy Stuart S.
Nguyen Hoa
Olympus Optical Co,. Ltd.
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