Patents by Inventor Ootaro Ando

Ootaro Ando 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).

  • Electronic endoscope provided with a sample-hold circuit
    Patent number: 5016975
    Abstract: An electronic endoscope having a light emitting unit for emitting illuminating light from the tip of the insertable part, a solid state imaging device at the tip for receiving an illuminated light image, a sample-holding circuit for sample-holding an output signal from the solid state imaging device, a light source for such light emitting unit and an iris device in such light source, the iris device comprising a diaphragm device for preventing the spectral characteristics of the endoscope from being changed due to the amount of light reduction which consists of a diaphragm assembly consisting of two dimensionally diaphragm units which consists of light passing openings with small sectional area and light shading parts formed by tubular surfaces surrounding the side surfaces of the openings, positioned in the beam emitted from illuminating lamp, and provided with means for turning diaphragm assembly from a position where the tubular surfaces are in parallel with the axis of the illumination beam to a position
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: May 21, 1991
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Masahiko Sasaki, Tadashi Kato, Hiroyoshi Fujimori, Tatsuo Nagasaki, Fumiyuki Onoda, Toshiaki Nishikori, Hideo Tomabechi, Kazutake Sugawara, Kazuo Nakamura, Ootaro Ando, Koichi Karaki