| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem in which correction cannot be performed on vibration/shock, etc. by tilt correction in feedforward. <P>SOLUTION: The optical disk device includes tilt driving means for driving tilt moving means so that a condensing point of a light beam for a servo is positioned at a prescribed position on a prescribed track of a servo layer on the basis of a deviation between a track of the servo layer and the condensing point of the light beam for the servo. The optical disk device further includes tracking driving means for driving tracking moving means so that a condensing point of a light beam for recording and reproducing is positioned on a prescribed track of a recording layer on the basis of a deviation between a track of the recording layer and the condensing point of the light beam for recording and reproducing. In the optical disk device for recording and reproducing an optical disk with the servo layer separated from the recording layer, tracking control, tilt control or aberration correction is performed on the basis of the position of a focus of the light beam for the servo and the position of a focus of the light beam for recording and reproducing. <P>COPYRIGHT: (C)2013,JPO&INPIT |
