| 摘要 |
An optical disk unit that directs a light beam onto a pregroove on an optical disk and generates a tracking error signal for tracking control based on a detection signal generated from a reflection of the light beam, the optical disk unit including a recording offset generator that acquires a differential between a tracking error component generated from a detection signal from the reflection of the light beam at a write power level and a tracking error component generated from a detection signal from the reflection of the light beam at a read power level and adds the differential to the tracking error signal at recording.
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