| 摘要 |
PROBLEM TO BE SOLVED: To improve the read performance of data of an optical disk by making an optical axis outgoing from an optical pickup device nearly orthogonal to the signal face of the optical disk in a tilt adjustment circuit for the optical disk device. SOLUTION: The tilt adjustment circuit for the optical disk device 1 makes the optical axis LBa of a laser beam LB outgoing from a light emitting element 11 of the optical pickup device 10 nearly orthogonal to the signal face 520 of the optical disk 500. This tilt adjustment circuit is equipped with; an error correction circuit 40 which corrects an error of a signal detected by a photo detector 15 of the optical pickup device 10; and a focus tilt signal adjustment circuit 71 which adjusts the angle deviation of an objective lens 13 based on the error correction number computed in the error correction circuit 40 when the angle deviation tends to arise in the objective lens 13 of the optical pickup device 10 to the signal face 520 of the optical disk 500. COPYRIGHT: (C)2006,JPO&NCIPI
|
