Patent ID: 7636279

Claim:
An objective lens actuator for enabling an objective lens holder that retains an objective lens to be driven to move in a focus direction that is an optical axis direction of the objective lens, a tracking direction that is a direction perpendicular to the focus direction, and a tilting direction that is a circumferential direction around an axis that is perpendicular to both the focus direction and the tracking direction, wherein the drive of the objective lens holder in the tilting direction is performed by interaction between a magnetic field formed by a magnet mounted on a base that constitutes the objective lens actuator and current that flows in at least one tilting coil provided to the objective lens holder, and the tilting coil is disposed so that a rotation center when the objective lens holder is driven in the tilting direction, is located on an extension line of a side of the tilting coil that effectively contributes to driving in the tilting direction by interaction with the magnetic field when current is supplied to the tilting coil among a plurality of sides of the tilting coil.