Patent ID: 7450480

Claim:
An optical information recording method for applying a laser beam to an optical information recording medium so that optical characteristics of a photosensitive recording film are changed to form a mark or a space, recording in such a way that a length of the mark or the space corresponds to a record code length, and forming the mark with a recording pulse in which power of the laser beam is changed among a power level PpT of a front portion of the recording pulse, a power level PpL of a rear portion of the recording pulse, and a power level PpM of a middle portion of the recording pulse, wherein the method comprises: a record signal generation step of identifying the record code length in accordance with a modulated signal and generating a record signal to be the recording pulse, a record signal edge correction step of correcting an edge position of the recording pulse in accordance with the record code length for the record signal, a record signal power level setting step of setting each of the power levels PpT, PpL and PpM to be different from each other, and setting each of the power levels PpT, PpL and PpM higher than a bias power level Pb, and a laser driving step of driving a laser to emit the laser beam as the recording pulse in accordance with the corrected record signal, wherein the power level from a start of the front portion of the recording pulse to an end of the rear portion of the recording pulse is higher than the bias power level Pb.