Patents by Inventor Tadao Kai

Tadao Kai 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: 7161621
    Abstract: An image-capturing device includes: an image-capturing element that converts light to an electrical signal; a photographic lens member that condenses subject light at the image-capturing element; a board on which the image-capturing element is mounted; and an elastic member having one end thereof secured to the photographic lens member and another end thereof secured to the board.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: January 9, 2007
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Kazutoshi Usui
  • Patent number: 6567618
    Abstract: A camera body has grip portions for right-handed users and the left-handed users provided respectively on the right and left sides thereof. A release button to be operated by the right hand is mounted on the side of the grip portion for right-handed users, and a release button to be operated by the left hand is mounted on the side of the grip portion for left-handed users. A ring member is rotatably mounted about a lens-barrel. When the ring member is rotated toward the release button for right-handed users, the release button for right-handed users is enabled, and when it is rotated toward the release button for left-handed users, the release button for left-handed users is enabled.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: May 20, 2003
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Masaru Habe, Akio Nishizawa
  • Publication number: 20020176713
    Abstract: An image-capturing device includes: an image-capturing element that converts light to an electrical signal; a photographic lens member that condenses subject light at the image-capturing element; a board on which the image-capturing element is mounted; and an elastic member having one end thereof secured to the photographic lens member and another end thereof secured to the board.
    Type: Application
    Filed: December 31, 2001
    Publication date: November 28, 2002
    Applicant: NIKON CORPORATION
    Inventors: Tadao Kai, Kazutoshi Usui
  • Publication number: 20020015593
    Abstract: A camera body has grip portions for right-handed users and the left-handed users provided respectively on the right and left sides thereof. A release button to be operated by the right hand is mounted on the side of the grip portion for right-handed users, and a release button to be operated by the left hand is mounted on the side of the grip portion for left-handed users. A ring member is rotatably mounted about a lens-barrel. When the ring member is rotated toward the release button for right-handed users, the release button for right-handed users is enabled, and when it is rotated toward the release button for left-handed users, the release button for left-handed users is enabled.
    Type: Application
    Filed: July 25, 2001
    Publication date: February 7, 2002
    Applicant: NIKON CORPORATION
    Inventors: Tadao Kai, Masaru Habe, Akio Nishizawa
  • Patent number: 6128035
    Abstract: A blur-correcting image pickup device includes, but is not limited to an image pickup optical system for picking up an image, a vibration-detecting device which detects vibrations of the image pickup device and generates an output relative to the detected vibrations, a blur-correcting device which corrects blurring of the image caused by the vibrations, a rangefinder which detects distance of the image to be picked up and generates an output relative to the detected image pickup distance, and an optical system setup device which sets up a specific image pickup condition for the image pickup optical system.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: October 3, 2000
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Akira Katayama, Sueyuki Ohishi
  • Patent number: 6016405
    Abstract: A camera having a camera system which is capable of reducing the influence that vibration generated in conjunction with driving of an actuator has on other component members of the camera system. The camera includes a lens barrel having a fixed cylinder, a focusing lens group moving mechanism, an actuator, such as an ultrasonic motor, to supply a driving force to the lens group moving mechanism, a vibration detection device to detect vibration, and a camera vibration compensation mechanism to compensate for the detected vibration. The camera system includes a component member having multiple reinforcing sections and a characteristic frequency which does not overlap with a drive frequency band of the ultrasonic motor or with the vibration frequency band of the vibration generated in conjunction with the driving of the ultrasonic motor. The component member may be a stator retaining member which supports a stator of the ultrasonic motor, or a sensor fixed cylinder which secures the vibration detection device.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: January 18, 2000
    Assignee: Nikon Corporation
    Inventors: Tsuneo Watanabe, Ryoichi Suganuma, Tadao Kai
  • Patent number: 6009278
    Abstract: A vibration preventing device is provided with a vibration preventing mode selector capable of selecting a vibration preventing mode in which vibration prevention driving is effected during exposure and a non-vibration preventing mode. Also provided are a vibration prevention start selector for selecting whether vibration prevention control is to be started, and a vibration prevention driving start instructing portion for instructing the start of vibration prevention. Start of vibration prevention driving occurs driving even before the start of exposure when the vibration preventing mode selector selects the vibration preventing mode and the vibration prevention start selector selects the start of the vibration prevention control.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 28, 1999
    Assignee: Nikon Corporation
    Inventors: Hiroshi Okano, Nobuhiko Terui, Tadao Kai, Yukio Uemura
  • Patent number: 6009279
    Abstract: A photographing apparatus having an anti-vibration function includes a vibration detecting unit for detecting a vibration of the photographing apparatus, a reference value calculating unit for calculating a reference value of an output of the vibration detecting unit, and a focusing unit for adjusting a focal position of a photographing image. The apparatus also includes a focusing operation stopping unit for stopping an operation of the focusing unit and a reference value calculation stopping unit for stopping the calculation of the reference value by the reference value calculating unit by detecting the operation of the focusing operation stopping unit.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: December 28, 1999
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Nobuhiko Terui
  • Patent number: 5953544
    Abstract: An image-shake correcting camera comprises an image shake correcting device for correcting image shakes caused by camera shakes and a photographic mode setting device for setting an operation condition of camera in photography, in which the image shake correcting device changes a correction property, based on the operation condition set by the photographic mode setting device.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: September 14, 1999
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Akira Katayama
  • Patent number: 5930531
    Abstract: An image shifting apparatus includes a frame for holding at least a portion of a photographing optical system, and a holding mechanism for holding the frame within a plane substantially perpendicular to an optical axis of the photographing optical system, and causing a force corresponding to a distance between the optical axis and a center of the optical system to act on the frame. At least two drive mechanisms drive the frame within a plane perpendicular to the optical axis in at least two directions which are not parallel to each other with forces corresponding to supplied power.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: July 27, 1999
    Assignee: Nikon Corporation
    Inventors: Yoshihisa Kitagawa, Tadao Kai
  • Patent number: 5881325
    Abstract: An apparatus which includes an optical system and a driving member. The optical system is shiftable from an origin position coinciding with an optical axis of the apparatus, to reduce image vibration affecting the apparatus. The driving member is movable from a first position to a second position. When the driving member is in the first position, the optical system is unlocked and is therefore shiftable to reduce image vibration. When the driving member moves from the first position to the second position and the optical system is not at the origin position, the driving member guides the optical system to, and then locks the optical system at, the origin position.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: March 9, 1999
    Assignee: Nikon Corporation
    Inventors: Yoshio Imura, Tadao Kai, Shinichi Hirano, Tetsuo In
  • Patent number: 5852750
    Abstract: An attitude adjustment device for use with a detector device which is used to detect rotational motion about an axis of a unit in which the attitude adjustment device is disposed. The attitude adjustment device includes, but is not limited to, a first adjustment mechanism to adjust the angle of the detector device such that the above-mentioned axis is parallel to a standard axis and is parallel to a first plane. Also, the attitude adjustment device includes a second adjustment mechanism to adjust the angle of the detector device such that the above-mentioned axis is parallel to a second plane which is orthogonal to the first plane and is parallel to the standard axis. Also, the present invention provides a method for adjusting the angular relationship between an angular velocity meter of a photographic device and the photographic device.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: December 22, 1998
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Hidenori Miyamoto
  • Patent number: 5828909
    Abstract: The driving apparatus for driving an object housed in a main body of the driving apparatus in a direction which is determined by a predetermined reference axis that includes a detector which detects a physical amount relating to a rotary motion of the main body around a predetermined detection axis; an arithmetic device .paren close-st. which calculates a driving amount of the object based on at least the output of the detector and an angle between the detection axis and the reference axis; and a driving mechanism which drives the object in a direction determined with the reference axis based on a calculation output from the arithmetic device.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: October 27, 1998
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Hidenori Miyamoto
  • Patent number: 5802403
    Abstract: A blur correction camera includes an optical axis changing unit to change an optical axis of a photographing optical system to correct a blur generated by vibration, a displacement detecting unit to detect displacement of the photographing optical system by the optical axis changing unit, a calculation unit to calculate a displacement velocity of the photographing optical system on the basis of a detection result from the displacement detecting unit, a centering unit to drive the optical axis of the photographing optical system to a central position based on the displacement detected by the displacement detecting unit, and a maximum displacement velocity detecting unit to detect a maximum displacement velocity upon movement of the photographing optical system by the centering unit. Whether a blur correction function is normal is discriminated on the basis of a detection result from the maximum displacement velocity detecting unit.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: September 1, 1998
    Assignee: Nikon Corporation
    Inventors: Sueyuki Ohishi, Tadao Kai
  • Patent number: 5771404
    Abstract: A shake preventing apparatus in a camera, comprises a shake detecting device for detecting an amount of shake upon small motion of the camera, a shake correcting device for correction-driving a photo taking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by the shake detecting device, a shake correction limit determining device for determining a shake correction limit amount which is a limit for the shake correcting device to correct the shake, and a shutter controlling device for controlling a shutter to close when the amount of shake detected by the shake detecting device exceeds the shake correction limit amount determined.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: June 23, 1998
    Assignee: Nikon Corporation
    Inventors: Akira Katayama, Tadao Kai
  • Patent number: 5752091
    Abstract: An image-shake correcting camera comprises an image shake correcting device for correcting image shakes caused by camera shakes and a photographic mode setting device for setting an operation condition of camera in photography, in which the image shake correcting device changes a correction property, based on the operation condition set by the photographic mode setting device.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: May 12, 1998
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Akira Katayama
  • Patent number: 5748994
    Abstract: An optical device, such as a camera, which includes an image blur suppression optical system to optically prevent image blur of a photographic image on an image plane of the optical device by changes in at least a portion of a photographic optical system. An image blur suppression drive unit drives the image blur suppression optical system, and a suppression position detection unit detects changes in the position of the image blur suppression optical system during the time of the image blur suppression. A lens prime and a memory unit generates constants indicative of optical conditions in the optical device which correspond to changes in the position of the image blur suppression optical system.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: May 5, 1998
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Nobuhiko Terui, Shinichi Tsukada
  • Patent number: 5740473
    Abstract: An anti-shake camera includes a camera shake correction lens for correcting image blurring caused by a camera shake, a camera shake correction lens position detection device for detecting the moving position of the camera shake correction lens, and an indication device for indicating a shaking direction of the camera so as to decrease the moving amount of the camera shake correction lens from a neutral position.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: April 14, 1998
    Assignee: Nikon Corporation
    Inventors: Etsuo Tanaka, Tadao Kai
  • Patent number: 5729770
    Abstract: This specification discloses an image movement correcting device for a photographing apparatus for appropriately judging a variation in the amount of image movement correction by the difference in the position of the center of rotation, and effecting accurate image movement correction. Any angular fluctuation of the optical axis of the photographing apparatus is detected by angular displacement detecting device, and when on the basis of the angular fluctuation, image movement correction on a photographing image field is effected by image movement correcting device, the amount of image movement correction by the image movement correcting device is varied in conformity with the position of the center of rotation discriminated by rotation center position discriminating device for discriminating the position of the center of rotation of the angular fluctuation during the photographing by the photographing apparatus.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: March 17, 1998
    Assignee: Nikon Corporation
    Inventors: Tadao Kai, Etsuo Tanaka, Akira Katayama
  • Patent number: 5724617
    Abstract: A photographing apparatus having a vibration reducing mechanism comprises a photographing optical system, a preparatory flash device for preventing a pink-eye, and a vibration reducing mechanism for detecting a vibration quantity of an optical axis of the photographing optical system and moving a whole or a part of the photographing optical system relatively to a photographing picture. The photographing apparatus has a function of stopping the preparatory flash device when the vibration reducing mechanism is in an operable state.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: March 3, 1998
    Assignee: Nikon Corporation
    Inventors: Shinichi Hirano, Tatsuo Amanuma, Fumiya Taguchi, Tadao Kai, Yoshio Imura