Patent ID: 7502286
Filing Date: 2009-03-10
Classification: G11B

Abstract:
1. A rotation correcting apparatus, comprising: a tracking servo controller which generates a tracking signal to perform a tracking servo control for guiding an optical beam spot outputted from a pickup to tracks of an optical disk and a track jump control for moving the optical beam spot to a certain track; a feed motor controller which controls a feed motor for moving said pickup to radius direction of the optical disk; a storage which stores signal components with a prescribed frequency band including a rotation frequency of the optical disk, said signal components being included in an output signal of said tracking servo controller and including an eccentricity component of the optical disk; and a combination unit which combines the signal components stored in said storage with the tracking signal to generate an ultimate tracking signal for the tracking servo control and the tracking jump control, wherein said feed motor controller controls said feed motor based on the tracking signal generated by said tracking servo controller without using the signal component stored in said storage.