| 摘要 |
An optical recording method for recording mark length-modulated information on a recording medium by using a plurality of recording mark lengths. The optical recording method comprises the steps of: when a time length of one recording mark is denoted nT (T is a reference clock period equal to or less than 25 ns, and n is a natural number equal to or more than 2), (i) dividing the time length of the recording mark nT into<paragraph lvl="0"><in-line-formula>eta1T, alpha1T, beta1T, alpha2T, beta2T, . . . , alphaiT, betaiT, . . . , alphamT, betamT, eta2T</in-line-formula>in that order (m is a pulse division number; SIGMAt(alphai+betai)+eta1+eta2=n; alphai (1<=i<=m) is a real number>0; betai (1<=i<=m-1) is a real number>0; betam is a real number>=0; and eta1 is a real number of -2<=eta1<=2 and eta2 is a real number of -2<=eta2<=2); radiating recording light with a recording power Pwi in a time duration of alphaiT (1<=i<=m), and radiating recording light with a bias power Pbi in a time duration of betaiT (1<=i<=m), the bias power being Pbi<Pwi and Pbi<Pwi+1; and (ii) changing m, alpha1, beta1, eta1, eta2, Pwi and Pbi according to n of the time length nT of the recording mark; wherein the pulse division number m is 2 or more for the time duration of at least one recording mark and meets n/m>=1.25 for the time length of all the recording marks.
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