| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem involved in a conventional method that it is necessary to accelerate a light source drive part when performing high-speed recording while it is impossible to accurately record the mark of a prescribed length. SOLUTION: When a plurality of recording data of a first set which includes the shortest mark length among the recording data of each mark length and has mark lengths different by 2T (T is a recording channel clock period.) from the shortest mark length are recorded, the pulse width of a rear heating pulse and the pulse width of a rear cooling pulse are made almost the same as that of the recording channel clock period. |
