Patents by Inventor Hiroyuki Sangu

Hiroyuki Sangu 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).

  • Light scanning devices of a water-tight structure to be inserted into a body cavity to obtain optical information on inside of a biological tissue
    Patent number: 6327493
    Abstract: A light scanning device has a tip structure which includes a light scanning part connected to a light source, and which is insertable into a body cavity and is formed so as to be water-tight. A controlling part controls the light scan through the tip structure, and the tip structure and the controlling part are also connected to each other in a water-tight manner by a slender tube through which a plurality of electrical cables pass. An electric connector is fixed with the proximal end portion of the tube in a water-tight manner, and is electrically connectable so as to be water-tight with and removable from this controlling part.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: December 4, 2001
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takeshi Ozawa, Mamoru Kaneko, Akihiro Horii, Atsushi Okawa, Hiroki Hibino, Hiroyuki Sangu, Hitoshi Ueno, Hitoshi Mizuno, Jun Hiroya, Katsuichi Imaizumi, Hidemichi Aoki, Masahiro Ohno, Eiji Yasuda, Yoshinao Oaki, Kenji Yoshino, Sakae Takehana, Isami Hirao, Takefumi Uesugi, Toshimasa Kawai
  • Optical imaging apparatus which radiates a low coherence light beam onto a test object, receives optical information from light scattered by the object, and constructs therefrom a cross-sectional image of the object
    Patent number: 6069698
    Abstract: A low coherence beam emitted by a low coherence light source is split into two portions. One portion is transmitted from the outward end of a first single mode fiber via a detachable connector to a beam scanning probe, and then to a biological tissue; and the other is transmitted from an optical coupler placed midway along the light path via a second single mode fiber to a light path modifier. The light path modifier includes a galvanometer mirror to modify the light path length in accordance with a scan range, and a uniaxial stage to adjust the light path length to absorb the variation in lengths of different beam scanning probes. The light path is adjusted by the uniaxial stage such that the beam interference is detected for the scan range, to ensure stable acquisition of tomographic images.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: May 30, 2000
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takeshi Ozawa, Mamoru Kaneko, Akihiro Horii, Hitoshi Ueno, Sakae Takehana, Hiroyuki Sangu, Isami Hirao, Hitoshi Mizuno, Toshimasa Kawai, Hiroki Hibino, Hideyuki Adachi, Hironobu Takizawa, Takefumi Uesugi, Masahiro Ohno, Hidemichi Aoki, Jun Hiroya, Katsuichi Imaizumi, Eiji Yasuda, Yoshinao Oaki, Kenji Yoshino