Optical disk recording device and optical disk recording method

摘要

The present invention optimizes recording power based on correct β value. Whether an average of modulation values between the 2-4th AUNs is equal to or less than 65% of an average of modulation values between the 5-7th AUNs or not is judged. Otherwise, the gradual emission is performed, the β value is measured, and then the following requirement is judged:
(average of β values between 5-7th AUNs)−(average of β values between 2-4th AUNs)≧0.18;If each requirement is satisfied, track shift is judged to occur. The recording area of high output is compared with the recording area of lower output to judge whether or not magnitude relation matches the correct magnitude relation. Also, whether the difference between the β value of high output and the β value of lower output is equal to or more than the predetermined value (0.18) or not is judged.

主权项

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.