Patents by Inventor Yuji Tsuruoka

Yuji Tsuruoka 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).

  • Exposure control method and apparatus compensating for detection of offset from a measured value
    Patent number: 5053614
    Abstract: An exposure apparatus includes a pulsed light source for repeatedly emitting a pulsed light; a photoelectric converting device for receiving at least a portion of the pulsed light from the pulsed light source; and a control device for controlling the emission of the pulsed light source, on the basis of a value related to a difference between a photoelectric signal produced from the photoelectric converting device at the time of emission of the pulsed light and an offset signal produced from the photoelectric converting device at the time of non-emission of the pulsed light.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: October 1, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshikiyo Yui, Yuji Tsuruoka