Patent ID: 7457221
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. An optical disc recording/reproduction device comprising: an optical pickup having an objective lens for collecting light flux onto an optical disc and forming an optical spot, a photo-detector for detecting a light flux reflected from the optical disc, an actuator for moving the objective lens, and a spherical aberration corrector for correcting a spherical aberration of the objective lens; means for generating a reproduction signal and a tracking error signal serving as data from an output signal from the photo-detector of the optical pickup; spherical aberration corrector drive means for driving the spherical aberration corrector of the optical pickup; and actuator drive means for driving the actuator of the optical pickup; wherein the tracking error signal generation means is adapted to be able to at least generate the tracking error signal by a push-pull signal based on the push-pull method; the optical disc recording/reproduction device further comprising: