Magnet for actuator, actuator, and magnetizing device

Details Magnet for actuator, actuator, and magnetizing device Magnet for actuator, actuator, and magnetizing device

2007-10-02

2007-10-02

Castro, Angel (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

11411150

ABSTRACT:
A magnet used for an actuator of an optical pickup has a magnetization pattern has two different pole areas adjacent with each other. At a corner part defined by the boundary line of the two pole areas, the pole area inside the corner part has a projection area, projecting in the direction of the pole area outside the corner part. Owing to the existence of the projection area, insufficiency of the magnetic flux density at the corner part particularly close to the vertex can be improved so that a desirable magnetic field can be provided to the printed coil substrate disposed in the vicinity of the magnet.

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