Patents by Inventor Yasutoshi Yagiu

Yasutoshi Yagiu 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).

  • Optical coupling apparatus and manufacturing method of the same, and lens holder
    Patent number: 5195155
    Abstract: An optical coupling apparatus including a light emitting diode, a lens, an optical isolator and an optical fiber disposed on a common optical axis is improved in the optical coupling efficiency. The individual optical elements are roughly adjusted in the respective positions and fixed, and then a precise and fine adjustment is effectuated by plastically deforming a portion of a holder for supporting the lens or the optical isolator and/or by adjusting inclination of the holder. The holder imparted with the fine adjustment capability can be implemented as a lens holder.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: March 16, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Shimaoka, Tetsuo Kumazawa, Yasutoshi Yagiu, Atsushi Sasayama
  • Semiconductor light emitting device and apparatus using the same
    Patent number: 5046798
    Abstract: A collimated-beam generating device using a semiconductor laser includes a two-lens system in which light converged by a first lens is converted into a collimated beam by a second lens, whereby a distance between the semiconductor laser and the first lens is made large, assembly of the device is made easy, and a collimated beam having a small beam diameter can be produced.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: September 10, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Yasutoshi Yagiu, Tetsuo Kumazawa, Makoto Shimaoka, Kunio Aiki