Patent ID: 7639576

Claim:
An optical disk device, operable to record data on an optical disk, comprising: a recording unit, operable to irradiate the optical disk with a light beam; an acquiring unit, operable to acquire a power of the light beam which is required to record data on the optical disk as a recording level; and a control unit, operable to decrease the power of the light beam from the recording level to a power-off level while an irradiating position of the light beam is changed by a first length corresponding to a data length of a half of one byte, after last one of first data is recorded by the recording unit, and operable to increase the power of the light beam from the power-off level to the recording level while an irradiating position of the light beam is changed by the first length, before first one of second data is recorded by the recording unit, wherein: the control unit is operable to increase the power of the light beam such that the irradiating position for the second data at which the power of the light beam starts increasing comes before the irradiating position for the first data at which the power of the light beam reaches 95% of the recording power while gradually decreasing, in a case where the second data is recorded additionally to the first data.