| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens actuator which is easy to sufficiently suppress unwanted resonance, even when the axis of the shake in the yawing-direction is deviated from the center of gravity.SOLUTION: The lens actuator includes a fixed part in which a first tracking magnet and a second tracking magnet are provided and a movable part having an objective lens, a first tracking coil and a second tracking coil, is formed so that the movable part is driven in a tracking direction by Lorentz force obtained by using the first tracking coil and the first tracking magnet and Lorentz force obtained by using the second tracking coil and the second tracking magnet, and adjusted in structure so that a magnetic field generated in the position of the first tracking coil by the first tracking magnet is stronger than a magnetic field generated in the position of the second tracking coil by the second tracking magnet by a predetermined amount. |
