Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-02-08
2005-02-08
Tran, Thang V. (Department: 2653)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
Reexamination Certificate
active
06853608
ABSTRACT:
An optical pickup apparatus has an objective lens that converges a laser beam on an optical recording medium and a lens holder that retains objective lens. The optical pickup apparatus also has a base member, four linear members having base ends supported by the base member and distal ends coupled to the lens holder. A driving device generates a magnetic force between the lens holder and the base member to elastically deform the linear members to thereby drive the objective lens in a focusing direction and/or a tracking direction. The four linear members have generally an identical configuration, and at least one portion of each of the four linear members in a longitudinal direction thereof has a cross section that is compressed and deformed in the focusing direction and/or tracking direction.
REFERENCES:
patent: 4878214 (1989-10-01), Hinotani
patent: 5523891 (1996-06-01), Fujisawa
Sugihara Hiroshi
Wade Tatsuki
Hogan & Hartson LLP
Sankyo Seiki Mfg. Co. Ltd.
Tran Thang V.
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