Patent ID: 7755990
Filing Date: 2010-07-13
Classification: G11B

Abstract:
1. An information recording apparatus comprising: a pickup which includes a laser light source; a light receiving unit which receives a laser light emitted from the laser light source and detects light receiving amount; a power control unit which controls a power of the laser light based on the light receiving amount; a test emission unit which executes test emission of the laser light according to a light waveform for calibration before actual information recording; and a duty control unit which controls emission duty of the laser light within a range smaller than a rated output value of the laser light source at the time of the test emission, the emission duty being a ratio of a time period for emitting the laser light to one period of the light waveform for calibration, wherein the duty control unit controls the emission duty of the laser light such that the emission duty is smaller than a substantial recording power duty, the substantial recording power duty being the emission duty of the laser light at the time of recording actual recording data.