Patents by Inventor Jun'ichi Katagiri

Jun'ichi Katagiri 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).

  • Method and apparatus of diagnosing deterioration of an article
    Patent number: 6852992
    Abstract: Light having polarization is irradiated onto an article, and then quality of the article is diagnosed using a pre-input correlation function between quality of the article and a variation of polarization of the light reflected from the article. Further, the quality of the article is diagnosed by measuring a reflection absorbance difference or a reflection absorbance ration of light from the article between two wavelenghts, and by measuring a depolarization degree of polarized light of the reflected light from the surface of the article. The quality of the article can be non-destructively diagnosed using a simple system. Further, defects can be identified of factor-by-factor basis.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: February 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yoshitaka Takezawa, Jun'ichi Katagiri, Hiroshi Shoji, Kenichi Ootaka