Patents Examined by Steven E. Stephan
  • Optical information recording media substrate
    Patent number: 4788678
    Abstract: An optical information recording media substrate made of a plane shaped molded object using thermo-plastic resin possessing optical anisotropy. A light beam is condensed in the direction perpendicular to the plane surface, transmitted through the plane surface and led to a recording media surface on which a recording media is formed. The direction of the optic axis of the light beam is set parallel to that of the plane surface to diminish the deterioration of the C/N ratio of the reproduced signal.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: November 29, 1988
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Akihiko Yoshizawa