Optical disk recording power adjustment method and optical disk apparatus adapted to operate with the same

Abstract

A recording power row P(i) is selected and a signal is recorded in a recording test region of an optical disk, while shifting a recording power, to detect a reproduced signal amplitude row m(i) that corresponds to the recording power row P(i). The relation of the recording power row P(i) and the row of multiplication products P(i)×m(i) is linearly approximated and the intersection of the linear approximation straight line and the recording power axis is computationally determined as recording threshold power P, for at least three recording power rows P(i) that are centered at P(j) in the recording power row P(i) within a defined range. Then, the recording power P(j) is computed as a multiplication product of the recording threshold power P(j) and a factor κ contained in the disk information, for each recording power row P(i). Finally, the optimum recording power Pis computationally determined according to the at least three recording powers P(j).