Patents by Inventor Riichi Higaki

Riichi Higaki 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).

  • Active distance measuring apparatus
    Patent number: 5253032
    Abstract: An active distance measuring apparatus comprises a projector for projecting modulated light to an object, a photo-sensor for sensing the modulated light reflected by the object to produce a pair of alternating current signals in accordance with a distance to the object, and a signal processor for producing a distance signal in accordance with the pair of alternating current signals. The signal processor includes a detector means for detecting a voltage corresponding to each of the pair of alternating current signals a plurality of times and adding the results of such detection and repeating such detection and addition a plurality of times and a calculation for calculating the distance signal based on the output of the detector.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: October 12, 1993
    Assignee: Nikon Corporation
    Inventors: Riichi Higaki, Yoshikazu Iida
  • Distance metering device of a camera
    Patent number: 5184167
    Abstract: A distance metering device of a camera eliminates a troublesome re-setting operation when a remote controller is used as a cable release and avoids the creation of defocused photograph when the remote controller is used as a self-timer.When a first remote control signal receiver is selected, that is, when the remote controller is to be used as the self-timer, a distance metering mode of a multi-point distance metering device is forcibly switched to a multi-point distance metering mode, and when a second remote control signal receiver is selected, that is, when the remote controller is to be used as the cable release, the forced switching is not done.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: February 2, 1993
    Assignee: Nikon Corporation
    Inventors: Yoshikazu Iida, Toru Kosaka, Hiroyuki Tsuru, Riichi Higaki, Akira Katayama
  • Camera with minimum subject-distance alarm display device
    Patent number: 5172156
    Abstract: A camera with a too-close-subject-distance alarm display device, further comprising a flash device for flashing the light to a subject to be photographed; a selection device for selecting at least the flash exposure mode in which the flash device is permitted to flash or the flash inhibit mode in which the flash device is inhibited to flash; a subject-distance measuring instrument for measuring a subject distance; a decision device for detecting whether the subject distance measured by said distance measuring instrument is less than a predetermined distance or not; an alarm device for alarming when said subject distance measured by said subject-distance measuring instrument is detected to be shorter than said predetermined subject distance by said decision device; and a setting device for setting said predetermined distance to a first predetermined distance when said selection device has selected the flash exposure mode and for setting said predetermined distance to a second predetermined distance longer than
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: December 15, 1992
    Assignee: Nikon Corporation
    Inventors: Hiroyuki Tsuru, Riichi Higaki, Yoshikazu Iida, Akira Katayama