Patents by Inventor Takehiko Ooshima

Takehiko Ooshima 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).

  • Temperature measuring apparatus utilizing radiation
    Patent number: 5235399
    Abstract: An apparatus for measuring the temperature of an object placed in a plasma by utilizing radiation includes measuring means for measuring the intensity of radiation from the object and the intensity of plasma light in different directions at the same time. The measuring means includes a first lens for receiving the radiation from the object and the plasma light, a second lens for converting the output beam of the first lens into parallel light rays, a third lens for focusing the parallel light rays, and an interference filter disposed rotatably between the second lens and the third lens.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: August 10, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Tatehito Usui, Tomoji Watanabe, Junichi Kobayashi, Takehiko Ooshima, Shunji Sasabe