Patent ID: 6819644
Filing Date: 2004-11-16
Classification: G11B

Abstract:
An optical disc recording apparatus comprising:recording pulse generating means for setting a recording power at approximately the leading end portion of a recording pulse in steps of a plurality of stages and for generating a recording pulse of a pulse width corresponding to a length of a pit to be formed, said recording pulse generating means includes: a first pulse generation circuit configured to generate a first pulse, a second pulse generation circuit configured to generate a second pulse, and a third pulse generation circuit configured to generate a third pulse; wherein said recording pulse generating means includes a pulse combining mechanism configured to combine said first pulse, said second pulse, and said third pulse to form said recording pulse; and laser means for illuminating laser light based on the recording pulse supplied to form a recording data string comprised of pits and lands on a recording medium; wherein said laser light based on the recording pulse generated by said recording pulse generating means is illuminated on a write-once optical disc as said recording medium to effect recording; and said first pulse corresponds to recording data, said second pulse is synthesized a predetermined time after a leading end of said first pulse and said third pulse is synthesized another predetermined time before a trailing end of said first pulse, said third pulse being of a pulse width smaller than said second pulse.