Patents by Inventor Yoichi Koizumi

Yoichi Koizumi 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).

  • Patent number: 5778261
    Abstract: A camera, equipped with a viewfinder having an optical axis different from the optical axis of the photographic lens system, has a parallax compensation apparatus for compensating for the parallax between the viewfinder and the photographic lens system. The parallax compensation apparatus includes a distance measuring device which measures an object's distance from the camera and an optical axis moving device which moves the optical axis of the photographic lens system according to the parallax, which is based on the results received from the distance measuring device, thereby matching the photographic image plane with the viewfinder field. In addition, the optical axis moving device moves the optical axis of the photographic lens system to compensate for hand trembling or other motion of the camera during shooting.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: July 7, 1998
    Assignee: Nikon Corporation
    Inventors: Etsuo Tanaka, Yoichi Koizumi
  • Patent number: 5016039
    Abstract: A camera system has a device for recording an image of a photographing field in a recording medium such as a photographing negative color film, a photometering device for forming brightness information concerning the brightness of the photographing field, and a color information forming device for forming, in accordance with the brightness information, color information concerning the color of the light from a light source for illuminating the photographing field. The printing process after the deployment of the image is executed with a suitable control of the printing exposure light quantity in accordance with the color information so that a color print of a good quality can be obtained with a high reproducibility of the color.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: May 14, 1991
    Assignee: Nikon Corporation
    Inventors: Toshio Sosa, Isao Uchida, Toru Fukuhara, Tadao Takagi, Hiroyuki Iwasaki, Toshihiro Sato, Masaru Muramatsu, Kazuto Ohtsuka, Tadao Kai, Shigeyuki Uchiyama, Yoichi Koizumi