Patents Assigned to Kabushiki Kaisha Komatsu Seisakucho
  • Method and apparatus for sensing the wavelength of a laser beam
    Patent number: 4926428
    Abstract: A method and apparatus for sensing the wavelength of a laser beam using an optogalvano effect by atoms or molecules in plasma. Atoms or molecules in the plasma are irradiated with the laser beam. The impedance of the plasma at that time is sensed to sense whether the wavelength of the laser beam coincides with a predetermined absolute wavelength. The sensed result is used to control the wavelength of the laser beam.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: May 15, 1990
    Assignee: Kabushiki Kaisha Komatsu Seisakucho
    Inventors: Koichi Kajiyama, Kaoru Saito, Yasuo Itakura, Osamu Wakabayashi, Masahiko Kowaka, Tadayoshi Yamaguchi