Patents by Inventor Tetsuro Kumayama

Tetsuro Kumayama 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).

  • Head-up display device
    Patent number: 5210626
    Abstract: A head-up display device comprises an image generator, a beam combiner having a light receiving plane tilted laterally for receiving a light from the image generator and diffracting the light, and a compensator arranged between the image generator and the beam combiner for receiving the light from the image generator by a light receiving plane thereof and directing the light to the beam combiner to correct an aberration created by the beam combiner. The compensator is arranged such that a normal line extending through a center of the light receiving plane thereof and a normal line extending through a center of the light receiving plane of the beam combiner are in a common plane.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: May 11, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuro Kumayama, Toshiaki Majima, Naosato Taniguchi, Yoko Yoshinaga, Hiroyoshi Kishi, Nobuo Kushibiki