| 摘要 |
In an optical disk drive mounting a drive unit 20 having a control use circuit 21 , and a pickup 1 having an aberration correction liquid crystal element 13 and a drive use circuit 2 which drives the aberration correction liquid crystal element, wherein the drive use circuit 2 stores astigmatic data for correcting a static astigmatism peculiarly provided in an optical system in the pickup 1 in an astigmatic data storage 6 , and drives the aberration correction liquid crystal element 13 based on the astigmatic data. By storing the static astigmatic data peculiar to the pickup, inside the pickup, it is possible to transfer the stored astigmatic data to the optical disk drive side easily, and to correct the astigmatism by driving the aberration correction liquid crystal element based on the astigmatic data.
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