Multi-head magneto-optical disk apparatus

Details Multi-head magneto-optical disk apparatus Multi-head magneto-optical disk apparatus

1988-10-03

1993-08-17

Beausoliel, Jr., Robert W.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1304

Patent

active

052375471

ABSTRACT:
A magneto-optical disk apparatus in which a magneto-optical disk is loaded, data can be recorded on the magneto-optical disk, the data recorded on the magneto-optical disk can be reproduced and the data recorded on the magneto-optical disk can be erased includes a plurality of head devices for applying beams to the magneto-optical disk, the number of the head devices being an even number, a control device for controlling the plurality of head devices so that respective ones of the plurality of head devices apply beams to different ones of a plurality of annular areas on the magneto-optical disk, the number of the annular areas being the same as the number of the head devices, the control devices having a plurality of supporting devices for supporting each two of the plurality of head devices thereon, the two head devices supported on the plurality of supporting devices being supported so as to apply beams to two recording areas which are not adjacent to each other, and an applying device for applying a magnetic field to the plurality of annular areas, the applying device applying a magnetic field to the magneto-optical disk in a predetermined direction when the data is recorded on the magneto-optical disk, and changing the direction of the magnetic field applied to the magneto-optical disk to the direction opposite to the predetermined direction when the data recorded on the magneto-optical disk is erased.

REFERENCES:
patent: 4460988 (1984-07-01), Gordon
patent: 4788671 (1988-11-01), Kanda
patent: 4802021 (1989-01-01), Makagawa et al.
patent: 4807204 (1989-02-01), Mizutani et al.
patent: 4841502 (1989-06-01), Murakami et al.
patent: 4845696 (1989-07-01), Ohtsuki et al.
patent: 4868802 (1989-09-01), Kobori

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