Patent ID: 7388821

Claim:
An information recording apparatus for recording information as marks on a recording layer of an optical recording medium by irradiating a laser beam with a light-emission waveform corresponding to a recording pulse, the information recording apparatus comprising: a rotation driving mechanism configured to perform a rotation operation so as to rotate the optical recording medium; a rotation controlling part configured to control the rotation operation according to a specified recording linear velocity; a laser light source configured to emit the laser beam; a light source driving part configured to drive the laser light source to emit the laser beam; a rectangular pulse calculating part configured to calculate pulse widths and recording powers for a rectangular pulse at a recording linear velocity that exceeds a predetermined recording linear velocity, based on set values of pulse widths and recording powers for a multi-pulse corresponding to the predetermined recording linear velocity for a target optical recording medium that are pre-formatted as a recording condition; and a rectangular test write part configured to perform a test write to the optical recording medium with different recording powers at the recording linear velocity based on the recording powers calculated by the rectangular pulse calculating part, so as to acquire an optimum recording power for recording with the rectangular pulse, wherein the recording is performed using the rectangular pulse at the optimum recording power acquired by the rectangular test write part, and wherein the rectangular pulse is not a multi-pulse.