Patent ID: 7026902
Filing Date: 2006-04-11
Classification: G11B,H01F,H02K

Abstract:
1. An optical actuator including at least one magnet; a yoke which fixes the at least one magnet; a base on which the yoke is installed; a bobbin, which moves freely relative to the base; a coil which generates magnetic flux in the at least one magnet as a result of the movement of the bobbin; an objective lens, installed on the bobbin; and a suspension supporting the bobbin, wherein the at least one magnet, which has a surface facing the coil, through which current flows, and generates the magnetic flux to be uniformly distributed around the at least one magnet and emitted toward the coil in a direction of a normal line of the surface of the at least one magnet facing the coil, the at least one magnet comprising a recession formed along a center of the surface of the at least one magnet facing the coil in a direction which is perpendicular to a longitudinal axis of the base.