Patents Assigned to KAZUMASA KUSAKA, DIRECTOR GENERAL OF NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND
  • Air refractometer
    Patent number: 6559951
    Abstract: An optical measuring light path formed by a vacuum-side laser beam (Pa) as a reference standard and an optical measuring light path formed by a gas-side laser beam (Pb) as a dimension to be measured are coaxially located sandwiching a movable end (optical transparent body 12) of a vacuum container (11) in order to satisfy Abbe's principle requiring linear disposition of the reference standard and the dimension to be measured in measurement direction, thereby reducing measurement error in measuring air refractive index and improving measurement accuracy therefor.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: May 6, 2003
    Assignees: Kazumasa Kusaka, Director General of National Institute of Advanced Industrial Science and Technology, Ministry of Economy, Trade and Industry, Mitutoyo Corporation
    Inventors: Jun Ishikawa, Morimasa Ueda, Hiroki Masuda, Yutaka Kuriyama
  • Air refractometer
    Publication number: 20010043334
    Abstract: An optical measuring light path formed by a vacuum-side laser beam (Pa) as a reference standard and an optical measuring light path formed by a gas-side laser beam (Pb) as a dimension to be measured are coaxially located sandwiching a movable end (optical transparent body 12) of a vacuum container (11) in order to satisfy Abbe's principle requiring linear disposition of the reference standard and the dimension to be measured in measurement direction, thereby reducing measurement error in measuring air refractive index and improving measurement accuracy therefor.
    Type: Application
    Filed: March 27, 2001
    Publication date: November 22, 2001
    Applicant: KAZUMASA KUSAKA, DIRECTOR GENERAL OF NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND
    Inventors: Jun Ishikawa, Morimasa Ueda, Hiroki Masuda, Yutaka Kuriyama