Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1990-05-18
1994-07-26
LaRoche, Eugene R.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 369 4411, G11B 1304, G11B 1112
Patent
active
053331249
ABSTRACT:
A magnetic optical disk player comprises a turn table for turning a magnetic optical disk, a recording head and an erasing head movable along two different radial directions of the turn table respectively, and bias magnets for generating bias magnetic fields distributed along moving areas of the recording and erasing heads and having the directions opposite to each other, wherein the recording head and the erasing head each includes an objective, movable coils coupled with the objective, and drive magnet for generating a drive magnetic field interlinking the movable coils in the same direction as that of the bias magnetic fields. The directions of the bias magnetic fields for erasing and recording heads are opposite to each other. The magnetic fields for generating electromagnetic forces to drive the objective in the erasing head and the recording head are also opposite to each other. The bias magnetic field and the magnetic field for generating the electromagnetic force are additively coupled with each other in each head.
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Kikuchi Ikuya
Sato Ryo
Glembocki Christopher R.
LaRoche Eugene R.
Pioneer Electronic Corporation
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