Patent ID: 7315494

Claim:
An optical disk device for recording a signal to and/or replaying a signal from an optical disk, the optical disk device comprising: a head, including an actuator that supports and moves an objective lens at least in a direction of tracking, for writing the signal onto the optical disk and/or reading the signal from the optical disk by directing a laser beam to the optical disk through the objective lens; a slider configured to transport the head in the direction of tracking; an acceleration sensor configured to detect and output a static acceleration acting on the objective lens in response to a change in posture of the optical disk device; and a slider controller configured to drive the slider so that the objective lens is aligned with the center of an optical field of view of the head, based on a detection signal from the acceleration sensor and a low-frequency component of a tracking servo signal for causing the objective lens to track, the slider controller including, a gain adjusting circuit that provides a predetermined gain to the signal from the acceleration sensor so that a signal corresponding to the detection signal output from the acceleration sensor is added to the low-frequency component of the tracking servo signal.