Magnetooptical recording/reproducing apparatus with bias magneti

Details Magnetooptical recording/reproducing apparatus with bias magneti Magnetooptical recording/reproducing apparatus with bias magneti

1994-06-01

1996-09-17

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, G11B 1304, G11B 1112

Patent

active

055575889

ABSTRACT:
In a magnetooptical recording/reproducing apparatus, a beam spot is formed on a recording medium by radiating a laser beam from an optical head to the recording medium. In magnetic field modulation recording, a bias magnetic field is applied from a first bias magnetic field generation device onto a very small region where the beam spot is formed. In optical modulation recording, bias magnetic field is applied from a second bias magnetic field generation device to the very small region. The first bias magnetic field generation device is adapted to be evacuated from a position above the very small region by an evacuating mechanism. The second bias magnetic field generation device is adapted to be moved to the position above the very small region to be mechanically interlocked with the evacuating mechanism.

REFERENCES:
patent: 4993009 (1991-02-01), Shiho
patent: 5202863 (1993-04-01), Miyatake et al.
patent: 5253232 (1993-10-01), Akagi et al.
patent: 5434831 (1995-07-01), Ishii et al.
Patent Abstracts of Japan, Kokai No. 6-76408, vol. 18, No. 330, Jun. 1994.
Patent Abstracts of Japan, Kokai No. 5-225642, vol. 17, No. 681, Dec. 1993.
Patent Abstracts of Japan, Kokai No. 4-21945, vol. 16, No. 182, Apr. 1992.

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