Patents by Inventor Hitoshi Umetsu

Hitoshi Umetsu 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 device fixing device
    Patent number: 6361177
    Abstract: The present invention relates to an optical element fixing device, and particularly to a prism mounting device for an optical device using light beam which passes through a prism or lens, a lens fixing device for aligning and fixing the center of a lens with a prescribed optical axis, and a device for fixing a reflecting mirror of an optical device. The invention can easily and securely position the prism to be press-contacted to the lens within a case, in which changes in the magnitude of press-contacting with the passage of time is very small. And, the lens can be securely fixed with its center accurately aligned with a prescribed optical axis. Besides, the reflecting mirror is fixed by a simple structure and a contact between the reflecting mirror and a plate spring is not limited to one point.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: March 26, 2002
    Assignee: Fujitsu Denso Ltd.
    Inventor: Hitoshi Umetsu
  • Optical device fixing device
    Publication number: 20010001252
    Abstract: The present invention relates to an optical element fixing device, and particularly to a prism mounting device for an optical device using light beam which passes through a prism or lens, a lens fixing device for aligning and fixing the center of a lens with a prescribed optical axis, and a device for fixing a reflecting mirror of an optical device. The invention can easily and securely position the prism to be press-contacted to the lens within a case, in which changes in the magnitude of press-contacting with the passage of time is very small. And, the lens can be securely fixed with its center accurately aligned with a prescribed optical axis. Besides, the reflecting mirror is fixed by a simple structure and a contact between the reflecting mirror and a plate spring is not limited to one point.
    Type: Application
    Filed: December 11, 2000
    Publication date: May 17, 2001
    Inventor: Hitoshi Umetsu
  • Optical device fixing device
    Patent number: 6144511
    Abstract: The present invention relates to an optical element fixing device, and particularly to a prism mounting device for an optical device using light beam which passes through a prism or lens, a lens fixing device for aligning and fixing the center of a lens with a prescribed optical axis, and a device for fixing a reflecting mirror of an optical device. The invention can easily and securely position the prism to be press-contacted to the lens within a case, in which changes in the magnitude of press-contacting with the passage of time is very small. And, the lens can be securely fixed with its center accurately aligned with a prescribed optical axis. Besides, the reflecting mirror is fixed by a simple structure and a contact between the reflecting mirror and a plate spring is not limited to one point.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: November 7, 2000
    Assignee: Fujitsu Denso Ltd.
    Inventors: Hitoshi Umetsu, Takeyoshi Imaki
  • Fingerprint distinction reader
    Patent number: D389817
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: January 27, 1998
    Assignee: Fujitsu Denso, Ltd.
    Inventor: Hitoshi Umetsu
  • Fingerprint distinction reader
    Patent number: D393837
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: April 28, 1998
    Assignee: Fujitsu Denso, Ltd.
    Inventors: Hitoshi Umetsu, Tetsuya Iino