| 摘要 |
PROBLEM TO BE SOLVED: To reduce crosstalk generated between a main data signal recorded in a groove track and a land prepit signal obtained from a land prepit. SOLUTION: An optical disk device 20 comprises a control means 21 which defocuses an objective lens 38 by offsetting a focus error signal FE in a direction of approaching an optical disk 1 while land prepit signals LPPo and LPPi appear during reproduction to the optical disk 1. COPYRIGHT: (C)2009,JPO&INPIT
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