Apparatus for recording and/or erasing an information signal on

Details Apparatus for recording and/or erasing an information signal on Apparatus for recording and/or erasing an information signal on

1989-11-07

1991-01-08

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, G11B 1304, G11B 1110, G11B 1112

Patent

active

049842242

ABSTRACT:
A recording head of a magneto-optical disk apparatus for recording and/or erasing an information signal on and from a magneto-optical disk mounted on the apparatus comprises optical pickup device disposed at a first side of the magneto-optical disk for producing an optical beam such that the optical beam is focused on the first side of the magneto-optical disk, pickup feeding mechanism provided on a frame of the magneto-optical disk apparatus for moving the optical pickup device along a path extending in a radial direction of the disk, a stepping motor disposed at a second side of the magneto-optical disk, the stepping motor having a housing containing a rotor magnet and a stator winding surrounding the rotor magnet, the rotor magnet including a plurality of elongated magnetic parts magnetized to either one of the N-pole and S-pole and arranged with alternate polarity about a rotary axis of the stepping motor such that each of the elongated magnetic parts extends parallel to the rotary axis, the rotor magnet further extending beyond the housing of the stepping motor, and mounting mechanism for mounting the stepping motor on the frame of the apparatus such that the rotor magnet projecting beyond the housing of the stepping motor extends substantially parallel to the disk along the path of the optical pickup device.

REFERENCES:
patent: 4701895 (1987-10-01), VanSant

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