Patent ID: 7420901
Filing Date: 2008-09-02
Classification: G11B

Abstract:
1. An optical information recording method of an optical information recording and reproduction device that uses a semiconductor laser to record or reproduce data in an optical recording medium, said optical information recording method comprising a step of: adjusting a calculated value of optimum recording power for recording data or an object value of recording power when data are being recorded, based on a detected value of an optical path difference of the optical recording medium; and wherein when calculating the optimum recording power before recording data in the optical recording medium, an optimum index indicating the optimum recording power is corrected with respect to a predetermined first index based on the detected value of the optical path difference of the optical recording medium, and the corrected optimum index is used as the calculated value of the optimum recording power, said predetermined first index being obtained by reproducing a trial write region that is recorded with recording power being varied stepwise.