Patent ID: 7453656
Filing Date: 2008-11-18
Classification: G11B

Abstract:
1. An optical pickup actuator comprising: a lens holder to hold an objective lens, movably supported by a supporting unit; and a magnetic driving unit to drive the lens holder in a focusing direction, a tracking direction, and/or a tilting direction, wherein the magnetic driving unit comprises: a surface-triple pole magnet comprising a plurality of differently magnetized areas, formed by facing similarly magnetized sides of each of two respective first and second magnets with a respective differently magnetized side of a third magnet; and a coil portion comprising tracking coils and tilt coils disposed to interact with the differently magnetized areas of the surface-triple pole magnet portion and a focusing coil disposed to interact with a non-differently magnetized area of the surface-triple pole magnet, wherein the first, second, and third magnets are disposed in the a same plane.