| 摘要 |
An integrated circuit includes a focus control section configured to perform focus control to generate a drive signal for the focus direction displacement section based on a focus error signal, a focus control error determination section configured to determine whether there is a focus control error or not, and a memory section configured to store error-time control signals which are used when there is a focus control error and correspond to a plurality of rotation angles. The focus control section stops the focus control and generates the drive signal for the focus direction displacement section, according to a rotation angle, based on the error-time control signals stored in the memory section at a radial position where it is determined by the focus control error determination section that there is a focus control error.
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