Patent ID: 8199615
Filing Date: 2012-06-12
Classification: G11B

Abstract:
1. A recording/reproducing apparatus, comprising: a light source to emit laser light; first correction means for correcting a position of an objective lens that collects the laser light emitted from the light source on a data recording surface of an optical disc based on a focus bias setting value obtained based on a focus bias value; second correction means for correcting an aberration of the laser light based on an aberration correction setting value obtained based on an aberration correction value; evaluation value generation means for generating an evaluation value obtained by digitizing a quality of a reproduction signal; focus bias adjustment means for changing plus and minus of the focus bias value and for calculating a new focus bias value based on the evaluation value generated by the evaluation value generation means upon a reception of a read command; and aberration adjustment means for carrying out, in parallel with an update of the focus bias value set by the first correction means, an aberration adjustment for changing plus and minus of the aberration correction value and for calculating a new aberration correction value based on the evaluation value generated by the evaluation value generation means upon the reception of the read command.