Patents by Inventor Moriyasu Maeno

Moriyasu Maeno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Storage device having a chasis integral with a stationary optical unit
    Patent number: 6717901
    Abstract: Provided is a compact inexpensive optical disk drive adaptable to high-density optical disks and having an improved stationary optical unit. The storage device has a first light path and a second light path defined therein. Along the first light path, laser light emanating from a laser light source is passed through a collimator lens and a beam splitter and routed to a movable optical system that is movable on an optical disk. Along the second light path, light reflected from the optical disk and returned from the movable optical system is split into a plurality of rays by the beam splitter, and one of the rays is routed to a sensor via a servo unit and a condenser. An angle at which the second light path meets the first light path is 90°+&agr;° where &agr; denotes a positive number.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: April 6, 2004
    Assignee: Fujitsu Limited
    Inventors: Moriyasu Maeno, Hidenori Saito, Jun Aoki, Masahiko Kataoka, Kazuyuki Mizuishi
  • Storage device employing optical storage medium
    Publication number: 20010048650
    Abstract: Provided is a compact inexpensive optical disk drive adaptable to high-density optical disks and having an improved stationary optical unit. The storage device has a first light path and a second light path defined therein. Along the first light path, laser light emanating from a laser light source is passed through a collimator lens and a beam splitter and routed to a movable optical system that is movable on an optical disk. Along the second light path, light reflected from the optical disk and returned from the movable optical system is split into a plurality of rays by the beam splitter, and one of the rays is routed to a sensor via a servo unit and a condenser. An angle at which the second light path meets the first light path is 90°+&agr;° where &agr; denotes a positive number.
    Type: Application
    Filed: March 21, 2001
    Publication date: December 6, 2001
    Applicant: FUJITSU LIMITED
    Inventors: Moriyasu Maeno, Hidenori Saito, Jun Aoki, Masahiko Kataoka, Kazuyuki Mizuishi