Patent ID: 7733753
Filing Date: 2010-06-08
Classification: G11B

Abstract:
1. An optical disk device, comprising: a pickup head which irradiates laser light upon a disk which is loaded into a main body of said device, and detects light reflected from said disk; a spindle motor which rotates said disk; a signal generation unit which generates, from the reflected light from the disk which has been detected by said pickup head, a focus error signal which indicates the amount of deviation between the recording surface of said disk and the position of condensation of the laser light irradiated from said pickup head, and a tracking error signal which indicates the amount of deviation between the center of a track upon said disk and the irradiation position of the laser light irradiated from said pickup head; a runout amount calculation means which, along with controlling the rotational speed of said spindle motor to a first disk rotational speed and obtaining a runout amount TE an out of balance disk detection means which detects that said disk which is loaded is an out of balance disk, if an absolute value V