| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processing method capable of reducing the occurrence of an off-track servo, etc., due to the influence of a defective part of a disk, a fingerprint, etc., and an optical disk apparatus to which the signal processing method is applied. SOLUTION: The optical disc apparatus provides a stable tracking error signal for aligning the center of a track or record mark string with the center of a laser beam irradiated to a recording surface by an object lens 11, when the object lens 11 is moved along the radial direction of an optical disc 100, by adding an output corrected to be able to reduce the influence of an offset deviation component obtained by a second processing of an adder(21-3), to an offset obtained by a first processing of an adder (21-1), when a defect or adhesion of material affecting optical characteristics is detected on a recording medium. COPYRIGHT: (C)2008,JPO&INPIT
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