| 摘要 |
PROBLEM TO BE SOLVED: To obtain an optical disk device capable of quickly executing offset adjustment from a signal obtained when a pickup is positioned on a specific position without scanning. SOLUTION: In the optical disk device including 1st and 2nd laser oscillation detection parts 8, 13 for radiating laser beams of a wavelength corresponding to the sort of an optical disk 1 through 1st and 2nd object lenses 6, 9 and receiving and detecting their reflected beams and a pickup provided with a base part 5 to be moved in the radial direction of the disk 1, the 1st object lens 6 is arranged on a 1st segment passing the center of the rotation of the disk 1, the 2nd object lens 9 is arranged on a 2nd segment approximately perpendicular to the 1st segment and offset from the 1st segment by a prescribed distance and a servo control means for controlling the tracking of the pickup adjusts the offset of a tracking signal from the amplitude of an RF signal obtained by an intermediate frequency offset adjusting position on which the sensor division line or hologram division line of the 2nd laser oscillation detection part 13 coincides with the tangent of a received spot pattern in a track traveling direction. |
