Patents by Inventor Toshiyuki Naoi

Toshiyuki Naoi 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).

  • Publication number: 20150146214
    Abstract: A measuring apparatus measures an optical performance of a test optical element and includes a diffraction grating configured to emit diffracted light, an image sensor configured to capture an interference pattern formed by the diffracted light, and a controller configured to move the at least one of the diffraction grating and the image sensor in an optical axis direction, to capture a plurality of interference patterns before and after movements, and to calculate a light-condensing position based on a spatial frequency of a plurality of interference patterns and a moving amount.
    Type: Application
    Filed: November 19, 2014
    Publication date: May 28, 2015
    Inventor: Toshiyuki Naoi
  • Patent number: 8520217
    Abstract: A Talbot interferometer includes a diffraction grating, an image pickup device, a moving unit configured to move at least one of the diffraction grating and the image pickup device in an optical axis direction of the test object, and a computer configured to adjust a position of the at least one of the diffraction grating and the image pickup device using the moving unit so that a Talbot condition can be met, based on a spatial frequency spectrum obtained from a plurality of interference fringes captured by the image pickup device while moving the at least one of the diffraction grating and the image pickup device using the moving unit.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: August 27, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Naoi, Seima Kato, Naoki Kohara, Chidane Ouchi
  • Publication number: 20100271636
    Abstract: A Talbot interferometer includes a diffraction grating, an image pickup device, a moving unit configured to move at least one of the diffraction grating and the image pickup device in an optical axis direction of the test object, and a computer configured to adjust a position of the at least one of the diffraction grating and the image pickup device using the moving unit so that a Talbot condition can be met, based on a spatial frequency spectrum obtained from a plurality of interference fringes captured by the image pickup device while moving the at least one of the diffraction grating and the image pickup device using the moving unit.
    Type: Application
    Filed: April 22, 2010
    Publication date: October 28, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Toshiyuki Naoi, Seima Kato, Naoki Kohara, Chidane Ouchi