| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk device capable of smoothly and effectively suppressing DC offset generated in a tracking error signal when two objective lenses are arranged in a direction orthogonal to a disk diameter. SOLUTION: Push-pull signals are generated from sensor signals of two sensors corresponding to two objective lenses. A signal obtained by multiplying one push-pull signal by a fixed times is subtracted from the other push-pull signal, and a tracking signal of the objective lens corresponding to the other push-pull signal is generated. By this subtraction process, DC offset generated in the other push-pull signal is suppressed. COPYRIGHT: (C)2007,JPO&INPIT
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