Lens driving apparatus

Details Lens driving apparatus Lens driving apparatus

2006-02-21

2006-02-21

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044150

Reexamination Certificate

active

07002879

ABSTRACT:
A lens driving apparatus for driving a movable body in a focus direction and a tracking direction is provided with: a holder, to which a focus coil, a tracking coil and a lens are installed, to thereby constitute the movable body; and a magnetic circuit for applying magnetic fluxes to the focus coil and the tracking coil, to thereby drive the movable body in the focus direction and the tracking direction. The tracking coil includes two sets each having upper and lower two coils arrayed in the focus direction such that the two sets are arrayed in the tracking direction. The magnetic circuit applies the magnetic fluxes opposite to each other along a jitter direction, with respect to the upper two coils and the lower two coils without applying the magnetic fluxes with respect to portions adjacent to the upper and lower two coils.

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