OPTICAL PICKUP AND OPTICAL DISK DEVICE, COMPUTER, OPTICAL DISK PLAYER, OPTICAL DISK RECORDER

摘要

PROBLEM TO BE SOLVED: To provide a compact and inexpensive optical pickup by reducing the number of parts in an optical pickup capable of recording or reproducing a high density optical disk using a blue-violet laser light source, and to provide an optical disk device.

SOLUTION: The movable length L of a coupling lens actuator, that is, the traveling range of a coupling lens is between the position of the coupling lens when recording or reproducing a DVD and the position of the coupling lens when recording or reproducing a CD. The traveling range of the coupling lens for correcting the spherical aberrations according to the thickness of the protective substrate of the information recording surface in the BD falls in the traveling range L of the coupling lens actuator.

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