Key Technologies to Realize Magneto-Optical Storage of Over 7 Gbytes in CD-Sized Disk.

  • Torazawa Kenji
    Hypermedia Research Center, Sanyo Electric Co., Ltd., 180 Ohmori, Anpachi–cho, Anpachi–gun, Gifu 503–01, Japan
  • Sumi Satoshi
    Hypermedia Research Center, Sanyo Electric Co., Ltd., 180 Ohmori, Anpachi–cho, Anpachi–gun, Gifu 503–01, Japan
  • Yonezawa Seiji
    Multimedia Systems R&D Division, Hitachi Ltd., 292 Yoshida–cho,Totsuka–ku,Yokohama 244, Japan
  • Suzuki Naomi
    Multimedia Systems R&D Division, Hitachi Ltd., 292 Yoshida–cho,Totsuka–ku,Yokohama 244, Japan
  • Tanaka Yasuhito
    Multimedia Systems R&D Division, Hitachi Ltd., 292 Yoshida–cho,Totsuka–ku,Yokohama 244, Japan
  • Takahashi Akira
    Precision Technology Center, Sharp Corporation, 2613–1 Ichinomoto–cho, Tenri–shi, Nara 632, Japan
  • Murakami Yoshiteru
    Precision Technology Center, Sharp Corporation, 2613–1 Ichinomoto–cho, Tenri–shi, Nara 632, Japan
  • Ohta Norio
    Engineering Research Laboratory, Hitachi Maxell Ltd., 6–20–1 Kinunodai, Yawara–mura, Tsukuba–gun, Ibaraki 300–24, Japan

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Many types of recording technologies have been reported for future magneto-optical (MO) storage. However, they have not been well discussed from the viewpoint of total recording technology including the recording and readout methods, the pick-up technology and the signal processing technology. We propose key technologies for realizing MO storage of over 7 Gbytes in a CD-sized disk using a red laser, and describe the analytical and experimental results pertaining to each key technology.

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