Patent ID: 6915526
Filing Date: 2005-07-05
Classification: G02B,G11B

Abstract:
1. An object lens driving device comprising: a fixed unit including: a movable unit configured to hold an object lens and to be movably supported by the fixed unit; a tracking mechanism having a first magnet affixed to the first yoke wall and a first coil affixed to the movable unit, the tracking mechanism being configured to drive the movable unit in a tracking direction by supplying electricity to the first coil; a focusing mechanism having a second magnet affixed to the second yoke wall and a second coil affixed to the movable unit, the focusing mechanism being configured to drive the movable unit in a focusing direction by supplying electricity to the second coil, wherein the first and second yoke walls, the yoke magnetic path, and the lid constitute a magnetic circuit of a closed magnetic path and the first and second magnets are provided inside the closed magnetic path; and a tilting mechanism having a third coil affixed to the fixed unit and a third magnet affixed to the movable unit, the tilting mechanism being configured to tilt the movable unit by supplying electricity to the third coil, wherein the polarities of the first to third magnets have substantially the same orientation, and have substantially the same orientation with the direction orthogonal to the tracking direction and the focusing direction, respectively.