Patents by Inventor Hachiro Kanai

Hachiro Kanai 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).

  • Control device for preventing red-eye effect on camera
    Patent number: 5697002
    Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When it is judge from the photographing condition that red-eye effect may occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of a person to be photographed, before the main flashing which is executed in synchronization with the exposure.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 9, 1997
    Assignee: Nikon Corporation
    Inventors: Hachiro Kanai, Toru Fukuhara, Toshio Sosa, Norikazu Yokonuma, Masaharu Hara
  • Control device for preventing red-eye effect on camera
    Patent number: 5664241
    Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When it is judged from the photographing condition that red-eye effect may occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of a person to be photographed, before the main flashing which is executed in synchronization with the exposure.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: September 2, 1997
    Assignee: Nikon Corporation
    Inventors: Hachiro Kanai, Toru Fukuhara, Toshio Sosa, Norikazu Yokonuma, Masaharu Hara
  • Control device for preventing red-eye effect on camera
    Patent number: 5400113
    Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When it is judged from the photographing condition that red-eye effect may occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of a person to be photographed, before the main flashing which is executed in synchronization with the exposure.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: March 21, 1995
    Assignee: Nikon Corporation
    Inventors: Toshio Sosa, Hachiro Kanai, Norikazu Yokonuma, Daiki Tsukahara, Kiyosada Machida, Noriyasu Kotani, Minoru Kato, Hideya Inoue, Hidenori Miyamoto, Tadashi Otani, Yoshiaki Ohtsubo, Tatsuo Amanuma
  • Control device for preventing red-eye effect on camera
    Patent number: 5317361
    Abstract: A camera capable of operating in a red-eye prevention mode. The camera has an electronic flash device which is activated by a drive circuit in synchronization with the exposure. The electronic flash device also serve as a pre-light-emission device capable of performing pre-light-emission for the purpose of preventing red-eye effect. When the photographing condition is judged that red-eye effect is possible to occur, a controller activates the electronic flash device to effect a pre-light-emission for reducing the size of pupils of eyes of the photographing object, before the main flashing which is executed in synchronization with the exposure.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: May 31, 1994
    Assignee: Nikon Corporation
    Inventors: Toru Fukuhara, Toshio Sosa, Masaharu Hara, Hachiro Kanai, Norikazu Yokonuma
  • Red eye prevent control device in an automatic focus adjustment camera and red eye prevent photographing method involving automatic focus adjustment
    Patent number: 5233374
    Abstract: The present invention is designed such that during flash photographing which involves pre-light emission for preventing red eye, focus adjustment is effected on the basis of focus adjustment information detected during the time from after the pre-light emission is effected until shutter release is effected and therefore, the time lag from the detection of the focus adjustment information until the shutter release can be minimized and a photo-taking lens can be reliably focused to a desired object even during flash photographing which involves the pre-light emission.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: August 3, 1993
    Assignee: Nikon Corporation
    Inventors: Hachiro Kanai, Toshio Sosa, Tohru Fukuhara
  • Soft-focus optical element
    Patent number: 4871242
    Abstract: A soft-focus optical element has a light-transmitting surface formed with a plurality of low refractive index portions each in the form of a lens-like curved surface; the size of each low refractive-index portion is within the following range;0.05 mm.ltoreq..phi..ltoreq.0.5 mm (1)and0.5.mu..ltoreq.h.ltoreq.3.mu. (2)where the diameter of the aperture of the low refractive-index portion is represented by .phi. and the height or depth between the light-transmitting surface and the top of the lens-shaped curved portion of the low refractive-index portion is presented by h; and the ratio S of the area of the plurality of low refractive-index portions to the area of the light-transmitting surface is defined as follows:5%.ltoreq.S.ltoreq.35% (3)The soft-focus optical element may be attached on an image-focusing lens.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: October 3, 1989
    Assignee: Nikon Corporation
    Inventors: Toshio Sousa, Koichi Wakamiya, Hiroshi Wakabayashi, Hachiro Kanai, Hidenori Miyamoto