Patents by Inventor Takayuki Ojima

Takayuki Ojima 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 switch element
    Patent number: 7184229
    Abstract: An optical switch element (1) for switching an optical path (2) comprises a fixed reflection element (4), which requires strict preciseness in positioning and angle-setting, and a movable optical path parallel displacement element (3A), which permits relaxed preciseness in positioning and angle-setting. When the movable optical path parallel displacement element is not present in the optical path, light goes straight, and when the optical path displacement element is inserted into the optical path, light running in the optical path is displaced in parallel, inputted into the fixed reflection element, and bent by the fixed reflection element.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: February 27, 2007
    Assignee: Oki Electric Cable Co., Ltd.
    Inventors: Takayuki Ojima, Kentaro Harase
  • Optical path switching device and add/drop optical switch
    Publication number: 20050074202
    Abstract: An optical switch for switching an optical path includes a fixed reflection element disposed at each of crossing points of a plurality of lines and a plurality of redundant lines for switching the optical path to one of the redundant lines, and a movable optical unit disposed at each of the crossing points and including an optical path parallel move element. The optical path parallel move element has parallel surfaces for moving the optical path in parallel toward the fixed reflection element. The movable optical unit located on the optical path of one of collimators moves in and out the optical path incident from an auxiliary collimator to switch the optical path when the one of the collimators has a problem.
    Type: Application
    Filed: September 23, 2004
    Publication date: April 7, 2005
    Inventors: Takayuki Ojima, Kentaro Harase, Yoshio Kawai, Hideharu Kajizuka, Takurou Horinaka, Atsuo Ishi
  • Optical switch element
    Publication number: 20050030650
    Abstract: An optical switch element (1) for switching an optical path (2) comprises a fixed reflection element (4), which requires strict preciseness in positioning and angle-setting, and a movable optical path parallel displacement element (3A), which permits relaxed preciseness in positioning and angle-setting. When the movable optical path parallel displacement element is not present in the optical path, light goes straight, and when the optical path displacement element is inserted into the optical path, light running in the optical path is displaced in parallel, inputted into the fixed reflection element, and bent by the fixed reflection element.
    Type: Application
    Filed: July 8, 2004
    Publication date: February 10, 2005
    Inventors: Takayuki Ojima, Kentaro Harase