Patent ID: 8861323
Filing Date: 2014-10-14
Classification: G11B

Abstract:
1. An optical disk recording device to perform an OPC (Optimum Power Calibration) before recording a signal on an optical disk comprising: a disk driving unit that drives to rotate an optical disk, an optical pickup that emits a laser beam to the optical disk driven to rotate by the disk driving unit to read/write the signal, a signal processing unit that processes the signal read by the optical pickup, a pickup driving unit that drives the optical pickup, and a control unit that controls the disk driving unit and the pickup driving unit based on the signal processed at the signal processing unit, wherein the signal processing unit obtains a measurement value including a modulation value and/or a β value based on a reflected light of the laser beam emitted to the optical disk, and the control unit records/reads the signal on a recording area gradually changing recording power when performing the OPC, measures both the measurement value including the modulation value and/or the β value obtained by a reading instruction for a predetermined recording area determined by a kind of the disk and the measurement value including the modulation value and/or the β value obtained by a reading instruction for another predetermined recording area determined by the kind of the disk, and retries a reading operation when a magnitude relation between two measurement values does not match a correct magnitude relation, which is a magnitude relation when recording the signal.