OPTICAL PICKUP, ABERRATION CORRECTION METHOD, OPTICAL PICKUP PROGRAM, INFORMATION RECORDING DEVICE, INFORMATION RECORDING METHOD, INFORMATION RECORDING PROGRAM, INFORMATION REPRODUCING DEVICE, INFORMATION REPRODUCING METHOD, INFORMATION REPRODUCING P

摘要

There is provided an optical pickup capable of accurately performing track search operation by further reducing the noise generated in a focus servo system during track search operation and accurately performing information recording/reproduction onto/from an optical disc. An optical pickup PU applies an optical beam B to an optical disc DK having a recording track of land/groove structure and receives a reflection light of the applied optical beam B. The optical pickup includes: a liquid crystal panel (3) for correcting astigmatism contained in the optical beam B unique to the optical system constituting the optical pickup PU when the tracking servo is in the ON state, and correcting both of the astigmatism and a track crossing noise generated in principle when the tracking servo is in the OFF state; and a liquid crystal panel control unit (8) for switching the liquid crystal panel (3) for operation according to the tracking servo state.