Patents by Inventor Eiichi Tiode

Eiichi Tiode 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).

  • Optical head device having deflection means including means for reducing reflected light angle
    Patent number: 4823335
    Abstract: An optical head device comprises a semiconductor laser beam source, a diffraction grating for deflecting a laser beam emitted from the laser beam source at an angle of about 90.degree., a beam splitter placed between the laser beam source and the diffraction grating, and an objective for converging the laser beam deflected by the diffraction grating on an optical disc.A surface of the grating is formed at an angle of inclination in the range from 0.degree. to 45.degree. with respect to the central optical axis of the laser beam emitted from the laser beam source so that a reflecting diffraction beam caused by the diffraction grating is used as a deflected beam.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: April 18, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinsuke Shikama, Mitsushige Kondo, Eiichi Tiode