| 摘要 |
The present invention relates to an optical disk device for recording or reproducing information on or from an optical information recording medium by forming marks and spaces. The device includes a jitter value measurement unit, a measurement unit, measured value memory, theoretical length memory, a deviation value calculation unit, a flexibility amount calculation unit, a correction value calculation unit, and a jitter value calculation unit. The measurement unit measures the lengths of marks and spaces using a varied reference write strategy. The deviation value calculation unit calculates the deviation values of the marks and the spaces. The flexibility amount calculation unit calculates the amounts of intrinsic flexibility of all marks and spaces. The correction value calculation unit calculates a correction value for the reference write strategy. The jitter value calculation unit calculates a jitter value.
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