Patents by Inventor Akinori Miyamoto

Akinori Miyamoto 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).

  • Electrooptic voltage waveform measuring method employing light sampling technique using Pockels effect
    Patent number: 6259244
    Abstract: An electrooptic voltage waveform measuring apparatus, which includes an electrooptic element having an electrooptic effect; a first electrode mounted on the electrooptic element and electrically coupled to an object to be measured; and a first light source irradiating a light on the electrooptic element. The electrooptic voltage waveform measuring apparatus further includes a polarization analyzer for analyzing a polarization state of the light passed through the electrooptic element and detecting a voltage waveform of the object; a second electrode mounted on the electrooptic element and separated from the first electrode; and an amplifier having an input terminal coupled to the second electrode and outputting a low-frequency component of the voltage waveform of the object.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: July 10, 2001
    Assignee: Fujitsu Limited
    Inventors: Shin-ichi Wakana, Akinori Miyamoto, Soichi Hama, Kazuyuki Ozaki, Toshiaki Nagai
  • Electrooptic voltage waveform measuring method and apparatus
    Patent number: 6057677
    Abstract: An electrooptic voltage waveform measuring apparatus, which includes an electrooptic element having an electrooptic effect; a first electrode mounted on the electrooptic element and electrically coupled to an object to be measured; and a first light source irradiating a light on the electrooptic element. The electrooptic voltage waveform measuring apparatus further includes a polarization analyzer for analyzing a polarization state of the light passed through the electrooptic element and detecting a voltage waveform of the object; a second electrode mounted on the electrooptic element and separated from the first electrode; and an amplifier having an input terminal coupled to the second electrode and outputting a low-frequency component of the voltage waveform of the object.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: May 2, 2000
    Assignee: Fujitsu Limited
    Inventors: Shin-ichi Wakana, Akinori Miyamoto, Soichi Hama, Kazuyuki Ozaki, Toshiaki Nagai