Patent ID: 6894965

Claim:
A method for adjusting a recording pulse for recording a mark on an optical disk comprising the steps of: (a) adjusting a first recording pulse for recording a shortest mark; and (b) adjusting a second recording pulse for recording a long mark, wherein the first recording pulse is a single pulse having a first power, the second recording pulse is a two-stage pulse including a first-part pulse having a second power and a second-part pulse having a third power, the step (a) includes the steps of: (a1) fixing a position of a rear edge of the first recording pulse so as to satisfy a prescribed relative relationship with a first edge of a recording clock; (a2) determining the first power so as to properly position a rear edge of a reproduced waveform of the shortest mark; and (a3) determining a position of a front edge of the first recording pulse based on a length of a space immediately before the shortest mark so as to properly position a front edge of the reproduced waveform of the shortest mark, and the step (b) includes the steps of: (b1) fixing a position of a rear edge of the first-part pulse so as to satisfy the prescribed relative relationship with a second edge of the recording clock; (b2) fixing a position of a rear edge of the second-part pulse so as to satisfy the prescribed relative relationship with a third edge of the recording clock; (b3) determining the second power; (b4) determining the third power so as to properly position a rear edge of a reproduced waveform of the long mark; and (b5) determining a position of a front edge of the first-part pulse based on a length of a space immediately before the long mark and a length of the long mark so as to properly position a front edge of a reproduced waveform of the long mark.