Patents Represented by Attorney McDermott Will & Emery LLO
  • Patent number: 7471605
    Abstract: An optical disk recording method includes the steps of: providing a multi-pulse chain from a recording wave; independently changing the pulse rise timing and pulse fall timing (pulse width) of the first pulse in the multi-pulse chain in accordance with a preceding space length and a recording mark length; changing the pulse rise timing and pulse fall timing (pulse width) in accordance with a following space length and the recording mark length in a predetermined timing or in independence; and in relation to the smallest mark recorded by irradiation with mono pulse, changing the rise timing in accordance with the preceding space length and the recording mark length and the fall timing (pulse width) in accordance with the following space length and recording mark length, compensating various optical disks different in recording material without change of the fundamental waveform.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: December 30, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Shinji Fujita, Takeshi Maeda, Manabu Shiozawa, Takahiro Kurokawa