Apparatus for applying magnetic field and magneto-optical disk s

Details Apparatus for applying magnetic field and magneto-optical disk s Apparatus for applying magnetic field and magneto-optical disk s

1991-07-19

1994-03-01

Pascal, Robert J.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360114, 369 13, 365122, G11B 502, G11B 5127

Patent

active

052913457

ABSTRACT:
An apparatus for applying a magnetic field has a permanent magnet, pivotally supported, which has an approximate cylindrical shape, respective semicircles of a circular section thereof being magnetized as N and S poles, and a driving coil, located in the vicinity of the permanent magnet so that the permanent magnet can partially penetrate inside the loops of the driving coil, the rotation and the positioning of the permanent magnet being controlled by the strength and/or directions of current flow in the driving coil. The apparatus is used for a magneto-optical disk storage. Since the driving coil is close to the permanent magnet, the pivoting of the permanent magnet can be controlled with a fast response. In addition, the apparatus can be made relatively small.

REFERENCES:
patent: 4748606 (1988-05-01), Naito et al.
patent: 4962492 (1990-10-01), Mathildus et al.
patent: 5020042 (1991-05-01), Fearnside et al.

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