Patent ID: 7277376
Filing Date: 2007-10-02
Classification: G11B

Abstract:
1. An optical recording method for recording mark length-modulated information on a recording medium by applying a recording laser beam locally to the recording medium, characterized in that when the record mark length of one record mark is represented by nT (where T is the reference clock period, and n is a natural number of at least 2), in order to form the record mark length of nT, m pieces of recording pulses α where m is a natural number representing a pulse dividing number, α i (1≦i≦m) is a real number of larger than 0, β i (1≦i≦m- 1 ) is a real number of larger than 0, and β m is a real number of at least 0), are used, and a recording laser beam having a writing power Pw a recording laser beam having a bias power Pb the front recording pulse α with respect to at least two record marks, the pulse dividing number m is at least 2, and with respect to all record marks with m being at least 2, 2.5≦n/m, in a case where plural different record mark lengths are to be respectively formed by the same pulse dividing number m, α when the α when the α