Patents by Inventor Sayoko Okada

Sayoko Okada 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).

  • Magneto-optical recording apparatus capable of adjusting the magnetic head
    Patent number: 6920087
    Abstract: A magneto-optical disk apparatus generates magnetic field onto a magneto-optical recording medium prior to recording signals in the magneto-optical recording medium having a recording layer and a reproduction layer, by use of magnetic field and laser beam. The magneto-optical apparatus then adjusts a position of a magnetic head that generates the magnetic field, under a state where the laser beam is irradiated, by utilizing that an irradiation spot of the laser beam deviates due to eccentricity of the magneto-optical recording medium. This position adjustment is carried out based on, for example, a beam position signal showing the irradiation spot of the laser beam and/or a detection signal which is detected after the laser beam is modulated by the magnetic field.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: July 19, 2005
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Satoshi Sumi, Yoshihisa Suzuki, Sayoko Okada
  • Magneto-optical disk apparatus
    Publication number: 20030227832
    Abstract: A magneto-optical disk apparatus generates magnetic field onto a magneto-optical recording medium prior to recording signals in the magneto-optical recording medium having a recording layer and a reproduction layer, by use of magnetic field and laser beam. The magneto-optical apparatus then adjusts a position of a magnetic head that generates the magnetic field, under a state where the laser beam is irradiated, by utilizing that an irradiation spot of the laser beam deviates due to eccentricity of the magneto-optical recording medium. This position adjustment is carried out based on, for example, a beam position signal showing the irradiation spot of the laser beam and/or a detection signal which is detected after the laser beam is modulated by the magnetic field.
    Type: Application
    Filed: March 25, 2003
    Publication date: December 11, 2003
    Inventors: Satoshi Sumi, Yoshihisa Suzuki, Sayoko Okada