| 摘要 |
PROBLEM TO BE SOLVED: To provide a focus pull-in method by which stable focus pull-in control can be performed even in initial focus pull-in. SOLUTION: The method has such constitution that focus pull-in is performed at a position being deviated minutely from a disk surface or a recording plane in a state in which a disk is stopped for initial focus pull-in or is rotated fully at low speed for the number of normal rotations, and a wobbling component is stored as the regular number of rotations after pull-in. Pull-in is performed for an information recording plane while adding the stored wobbling component to a focus moving means. COPYRIGHT: (C)2008,JPO&INPIT
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