Patents Examined by D. Wilkinson
  • Patent number: 6493297
    Abstract: Multibeam optical disk record and reproduction apparatus and method, in which at least two light beams generated are concentrated in different positions of on recording tracks of a recording medium to record or reproduce data to or from the recording medium on the different positions at the same time. The light beams are moved independently of each other across the recording tracks so that any one light beam is movable during the recording or reproducing of data by another light beam. This allows parallel recording/reproducing with a plurality of light beams without producing areas unaccessed due to the jumps of the light beams.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: December 10, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Soichi Isono, Satoshi Kawamura, Kiyoshi Honda, Toshimitsu Kaku, Hitoshi Komatsu, Yuji Yamane, Yasushi Fukuda, Toshio Niihara, Hiroshi Ide