Patent ID: 7113468

Claim:
An optical recording apparatus for recording data in a recording medium, comprising: recording processing means for applying encoding processing to data to be recorded to generate encoded data and for generating laser driving pulses used for executing pulse-train-manner laser outputs, according to the encoded data; recording-head means for emitting the laser outputs to the recording medium according to the laser driving pulses to execute recording of a data string formed of a mark and a space on the recording medium; reflected-light information signal detection means for detecting a reflected-light information signal obtained when the recording-head means emits the laser outputs; peak signal-value detection means for detecting a space-period peak signal value corresponding to a period of the space and a second-and-subsequent-pulse peak signal value corresponding to second and subsequent pulses in the pulse-train manner laser outputs, in the reflected-light information signal detected by the reflected-light information signal detection means; estimation means for estimating a first-pulse signal peak value corresponding to a first pulse in the pulse-train manner laser outputs by using the space-period signal value detected by the signal-value detection means; calculation means for obtaining the ratio between the second-and-subsequent-pulse peak signal value detected by the signal-value detection means and the first-pulse peak signal value obtained by the estimation means and for generating a laser-power compensation signal by using the obtained ratio and a reference ratio; and laser-power control means for controlling the power of the laser outputs according to the laser-power compensation signal sent from the calculation means.