Patent ID: 6421191
Filing Date: 2002-07-16
Classification: G11B

Abstract:
An objective lens driving apparatus comprising:a lens holder for holding an objective lens; elastic supports secured at one end to the lens holder and at the other end to a fixed section, thereby allowing the lens holder to move; and a drive unit for driving the lens holder in a direction parallel to an optical axis of the objective lens and in a plane perpendicular to the direction parallel to the optical axis, said drive unit having at least two magnets provided on the lens holder, a coil section secured to the fixed section, and a yoke constituting, along with the magnets, a closed magnetic circuit, wherein said at least two magnets are arranged, opposing each other, the coil section is located in a gap between said at least two magnets, and a center of the gap is aligned with a center of the coil section.