| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of compensating for variations in track pitches in an apparatus for processing data stored, in a disk using an optical pickup. SOLUTION: The method is comprised of a step (S11) of, while a pickup assembly (21) is transferred, activating a focus servo to trace tracks of the disk and generate an output signal, and at the same time, inactivating a tracking servo so as not to trace the tracks of the disk; while the disk is rotated, transferring the pickup assembly across the tracks of the disk to generate a traverse signal, counting the number of pulses of the traverse signal, transferring the pickup assembly (21) for measuring the track pitch, measuring the rotation number of a disk, calculating the track pitch of the rotating optical disk using the measured number of pulse of the traverse signal and the actual distance the pickup assembly transferred; and the number of pulse of the traverse signal; calculating a target track using the calculated track pitch; and performing a seek operation. COPYRIGHT: (C)2004,JPO
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