Invention Grant
US07684289B2 Actuator for optical pickup, optical pickup, and apparatus for reading or recording information
失效
用于光学拾取器,光学拾取器以及用于读取或记录信息的装置的致动器
- Patent Title: Actuator for optical pickup, optical pickup, and apparatus for reading or recording information
- Patent Title (中): 用于光学拾取器,光学拾取器以及用于读取或记录信息的装置的致动器
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Application No.: US10780555Application Date: 2004-02-19
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Publication No.: US07684289B2Publication Date: 2010-03-23
- Inventor: Yoshihiko Yokoyama , Mitsuhiro Toyota
- Applicant: Yoshihiko Yokoyama , Mitsuhiro Toyota
- Applicant Address: JP Hyogo
- Assignee: Fujitsu Ten Limited
- Current Assignee: Fujitsu Ten Limited
- Current Assignee Address: JP Hyogo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JPP2003-041666 20030219
- Main IPC: G11B7/09
- IPC: G11B7/09 ; G11B7/135

Abstract:
A high reading performance is secured in an optical pickup even if magnets are miniaturized. In an optical pickup, around a lens holder which holds a lens, track coils are wound from a range of a flange of the lens to the outside in a diameter direction. The track coils become close to an optical axis of the lens and close to the center of a magnetic field formed in a unipolar face-to-face type of magnetic circuit, with the result that it is possible to displace so that the optical axis is hard to be tilted and secure a high reading accuracy. By forming a wound line shape of a focus coil and the track coils into a hexagon or the like, it is possible to make curving magnetic fluxes generated around magnetic pole surfaces hard have an affect in the unipolar face-to-face type of magnetic circuit.
Public/Granted literature
- US20040228228A1 Actuator for optical pickup, optical pickup, and apparatus for reading or recording information Public/Granted day:2004-11-18
Information query
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