作者: Masahiro Shigenobu , Yasuaki Maeda
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摘要: The present invention relates to a skew control method and control unit by which stable can be performed with simple configuration without the need for dedicated sensor. Focus drive voltages V1 V2 are measured at plurality of points P1 and P2 set moving an optical pick-up 31 in radial direction disc 2 in a state where focus servo is ON, angle control is so that equal each other.