Object lens driving device with reduced tilt during focusing...

Details Object lens driving device with reduced tilt during focusing... Object lens driving device with reduced tilt during focusing...

2005-02-23

2009-02-10

Nguyen, Hoa T (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044150

Reexamination Certificate

active

07489600

ABSTRACT:
An object lens driving device with reduced tilt even when focusing and tracking operations are performed simultaneously . The object lens driving device includes a movable unit with an object lens and an object lens holding member lens, elastic supporting rods arranged on two sides of the movable unit in a tangential direction and supporting the movable unit while allowing the movable unit to move relative to a fixed unit in a focusing direction and a tracking direction, and a driving unit that includes a focusing thrust force generation unit and a tracking thrust force generation unit. The force generation units generate a moment which acts to cancel out a tilt of the movable unit occurring in a supporting system when the movable unit moves in the focusing direction and the tracking direction.

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