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    • 3. 发明公开
    • OPTICAL RECORDING METHOD
    • OPTISCHES AUFZEICHNUNGSVERFAHREN
    • EP1647976A1
    • 2006-04-19
    • EP04747937.3
    • 2004-07-16
    • Mitsubishi Kagaku Media Co., Ltd.
    • HORIE, Michikazu Mitsubishi Kagaku Media Co., Ltd.OHNO, Takashi, Mitsubishi Kagaku Media Co., Ltd.KIYONO, Kenjirou Mitsubishi Kagaku Media Co., Ltd.KUBO, Masae, Mitsubishi Kagaku Media Co., Ltd.
    • G11B7/0045G11B7/125
    • G11B7/0062
    • To provide an optical recording method to be used for recording at a high data transfer rate where the reference clock frequency is at least about 200 MHz and a linear velocity is about 40 m/sec.
      When recording mark length-modulated information is to be recorded on a recording medium by applying a recording laser beam locally to the recording medium, in order to form one record mark length of nT, m pieces of recording pulses α i T (1≦i≦m) and m pieces of off-pulses β i T (1≦i≦m), represented by: α 1 T , β 1 T , α 2 T , β 2 T , … , α i T , β i T , … , α m T , β m T (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 i is applied within a time of α i T (1≦i≦m), a recording laser beam having a bias power Pb i of Pb i i and Pb i i+1 , is applied within a time of β i T (1≦i≦m-1), the front recording pulse α 1 T will rise as deviated for a time of dT top from the front position of the record mark having a length of nT, 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 1 and/or α m is changed to form such record mark lengths having different lengths respectively, provided that when the α 1 is changed, dT top and/or β 1 is also changed, and when the α m is changed, β m-1 and/or β m is also changed.
    • 提供一种用于以高数据传输速率进行记录的光记录方法,其中参考时钟频率为至少约200MHz,线速度为约40m / sec。 当记录标记长度调制信息通过将记录激光束局部地施加到记录介质上而将记录标记长度调制信息记录在记录介质上时,为了形成nT的一个记录标记长度,m个记录脉冲±i T(1‰| ‰‰‰‰‰²²²²²²²‰‰‰‰‰²²²²²²²²²²T T T T T T T T T T T ,²i T,€|,±m T,²m T(其中m是表示脉冲除数的自然数,±i(1‰|‰| m)是大于0的实数,²i (1‰|‰| m-1)是大于0的实数,²m是至少为0的实数),并且将具有写入功率Pw i的记录激光束施加在 在±i T(1‰|‰| m)的时间内,具有Pb i