Objective lens actuator

Details Objective lens actuator Objective lens actuator

2005-12-20

2009-06-02

Tran, Thang V (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07542384

ABSTRACT:
An objective lens actuator is provided. An objective lens holder is movably located on a ferromagnetic yoke with corresponding to inner yokes thereof to hold an objective lens. Tracking coils and focusing coils are respectively located on different two opposite sides of the lens holder and the latter are surrounded with the inner yokes. A magnetic element set is located on the ferromagnetic yoke corresponding to the coils to generate a magnetic field perpendicular to the optical axis of the lens. A suspension wire set is connected to the lens holder and the coils to hang the lens holder and channel current to the coils. A damper holder is located on a ferromagnetic yoke to allow the wire set to pass through. A printed circuit board is located on the damper holder and coupled with the wire set to provide the current to the coils, to drive the lens holder.

REFERENCES:
patent: 4646283 (1987-02-01), Ito et al.
patent: 4991161 (1991-02-01), Ikegame et al.
patent: 5216648 (1993-06-01), Noda et al.
patent: 6714491 (2004-03-01), Ke et al.
patent: 6724696 (2004-04-01), Kim et al.
patent: 7408848 (2008-08-01), Ke et al.

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