| 摘要 |
PROBLEM TO BE SOLVED: To meet requests for speeding up of information recording, densified recording on an information recording medium, etc., by suppressing deviation from the desired value of an optical modulation waveform caused by the distortion, skew, etc., of an optical modulation control signal waveform without sacrificing cost, performance, etc. SOLUTION: Timing information indicating each of a plurality of pulse widths of a pulse train waveform is stored. A modulation signal indicating the change timing of the irradiation level of a light source 102 is generated from the timing information. A state transition signal is generated to instruct the transition of a state corresponding to an irradiation level from the timing information. The transition of the state is controlled from the modulation signal, the state transition signal and a transition rule set in advance. Modulation data corresponding to the selected state are generated, and the light source 102 is driven on the basis of the modulation signal and the modulation data. |
