Patent ID: 7075871

Claim:
A method for recording optical data to a recording medium by modulating the intensity of an irradiating light beam and by modulating the lengths of a plurality of recording marks and spaces between each two said recording marks, comprising the steps of: forming first recording marks each having a length of n 1 Â·Tw and second recording marks each having a length of n 2 Â·Tw using a plurality of m recording pulses each having a predetermined maximum power Pw, while successively changing the maximum power Pw of the recording pulses for testing; reproducing the first and second marks recorded for said testing and measuring lengths T 1 (Pw) and T 2 (Pw), respectively, of the recording marks; and setting a recording power Pwo by evaluating deviations D 1 (Pw) and D 2 (Pw) of the measured lengths T 1 (Pw) and T 2 (Pw) from n 1 Â·Tw and n 2 Â·Tw, respectively, where Tw is a period of a recording channel clock; n 1 , n 2 are integers, and n 1 <n 2 ; m is an integer, and m<n 1 ; D 1 (Pw)=T 1 (Pw)âˆ’n 1 Â·Tw; and D 2 (Pw)=T 2 (Pw)âˆ’n 2 Â·Tw.