| 摘要 |
An acceleration alpha that is peculiar to a lens actuator is obtained by an acceleration measuring section on the basis of a moving speed when a 1-track jump such that a light beam spot of an optical head is moved to an adjacent track is executed to the lens actuator. A seek control section moves the light beam spot of the optical head to a target track by an acceleration control and a constant speed control of the lens actuator. When the light beam spot reaches a position that is located by a predetermined number of tracks before the target track, the lens actuator is deceleration controlled on the basis of the acceleration measured by the acceleration measurement and the light beam spot is on-tracked to the target track at the end time point of the deceleration control.
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