Patents by Inventor Koichi Sugimura

Koichi Sugimura 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).

  • Systems for inspecting defects in an optical recording medium
    Patent number: 5067812
    Abstract: The present invention provides a defect inspecting apparatus which can easily and accurately carry out the inspection of a defect in a recording medium and which does not require electrical image processing or image processing by means of software in order to eliminate a regular pattern.This defect inspecting apparatus has an optical image forming system, such as a microscope, which enlarges an optical recording area of an optical recording medium having a regular pattern and an image processing part which converts the enlarged image sent from the optical image forming system into an image signal and detects the defect in the optical recording area from the image signal. In addition, a space filter which eliminates the space frequency component of the regular pattern is mounted on the optical image forming system.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: November 26, 1991
    Assignee: Kabushiki Kaisha CSK
    Inventors: Koichi Sugimura, Fumio Kimura, Shigeru Izawa