Object lens actuator, optical pickup and optical disk drive

Details Object lens actuator, optical pickup and optical disk drive Object lens actuator, optical pickup and optical disk drive

2011-08-16

2011-08-16

Tran, Thang V (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

08000183

ABSTRACT:
The present invention provides an object lens actuator, an optical pickup, and an optical disk drive, which can increase the size of the object lens actuator driving a lens holder in the tangential tilt direction, and drive and control the lens holder with a small amount of drive current.An object lens actuator comprising a lens holder having an object lens and a first coil; a first magnet fixed to a yoke; plural elastic support parts for supporting said lens holder with a first fulcrum; a moving part for supporting said elastic support parts with a second fulcrum different from said first fulcrum, and a fixed part having a moving mechanism for moving said moving part, wherein said first coil and said first magnet constitute a first magnetic circuit, said first magnetic circuit makes said lens holder movable in a focusing direction, a tracking direction and a radial tilt direction of an optical disk for read/write, and said moving mechanism makes said moving part movable.

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Kawasaki et al., Radial and Tangential-Tilt Servo Using Four-Axis Actuator, Ricoh Technical Report, (Dec. 2005), No. 31, pp. 47-51.
Office Action issued in Japanese Patent Application No. 2007-274926 on Mar. 8, 2011.

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