Patents by Inventor Takashi Urakawa

Takashi Urakawa 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: 7573626
    Abstract: Provided is an optical scanner for observing an image that is formed by performing two-dimensional scanning with the aid of a swinging movable mirror, using light beams modulated on the basis of image information and emitted from a light source unit. An optical scanner of the present invention includes a scanning device and a fixing member having an attachment portion for attachment of the scanning device, the scanning device including a movable mirror, an elastic support portion supporting the movable mirror such that the movable mirror can swing around a swinging center, a support base supporting the elastic support portion, and a swinging unit for swinging the movable mirror. A first surface of the attachment portion is formed on a plane of a surface of the movable mirror. A second surface of the attachment portion is formed on a plane which is perpendicular to the surface of the movable mirror and includes the swinging center.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: August 11, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Urakawa
  • Patent number: 7529045
    Abstract: Provided is an optical element with a configuration in which distortion due to fixing thereof on an effective optical portion can be reduced, preferably be eliminated and an apparatus including an optical element. The optical element comprising an effective optical portion on which a light beam is incident, a connecting portion with a holding member which holds the optical element, and a recess portion between the connecting portion and the effective optical portion. It is configured that force effecting on the connecting portion is attenuated by the recess portion then transmits to the effective optical portion. The recess portion is configured in groove shape, and the effective optical portion and the connecting portion can be configured different from each other in thickness.
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: May 5, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Urakawa
  • Publication number: 20090040585
    Abstract: The object of the present invention is to provide an optical scanning apparatus which is not limited in the disposition of a scanning device, can reduce the adherence of dust to each member of the scanning device, and is enhanced in the reliability of the scanning device, and an image displaying apparatus having the same. The optical scanning apparatus includes a housing for containing and holding therein a scanning device provided with a movable mirror, an elastic supporting portion for supporting the movable mirror swingably about a swinging center, and a supporting base for supporting the elastic supporting portion, an optical member OE constituting a first optical system for directing a beam to the scanning device in the housing, and an optical member OX constituting a second optical system for emerging the beam passed through the scanning device.
    Type: Application
    Filed: October 9, 2008
    Publication date: February 12, 2009
    Inventors: Takashi Urakawa, Akira Yamamoto, Keiichiro Ishihara
  • Patent number: 7453613
    Abstract: The object of the present invention is to provide an optical scanning apparatus which is not limited in the disposition of a scanning device, can reduce the adherence of dust to each member of the scanning device, and is enhanced in the reliability of the scanning device, and an image displaying apparatus having the same. The optical scanning apparatus includes a housing for containing and holding therein a scanning device provided with a movable mirror, an elastic supporting portion for supporting the movable mirror swingably about a swinging center, and a supporting base for supporting the elastic supporting portion, an optical member OE constituting a first optical system for directing a beam to the scanning device in the housing, and an optical member OX constituting a second optical system for emerging the beam passed through the scanning device.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: November 18, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Urakawa, Akira Yamamoto, Keiichiro Ishihara
  • Patent number: 7414791
    Abstract: What is disclosed is an eye detection apparatus which can detect the pupil position accurately. The apparatus has an image taking unit that picks up an image of an eye and a pupil detection unit that detects the position of the pupil in the eye based on an image picked up by the image taking portion. The pupil detection unit determines the pupil position based on images picked up by the image taking unit in a plurality of states.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: August 19, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Urakawa, Yoshihiroi Saito, Akinari Takagi
  • Publication number: 20080049095
    Abstract: A compact light scanning apparatus is disclosed which can provide a high light scanning efficiency. The apparatus includes a scanner that scans a light beam from a light source to form an image in an effective scan area, and a light detector that detects light. The light scanning apparatus includes a light-introducing member that introduces a partial light beam component of the light beam within its light beam width to the light detector in a state in which the light beam scanned by the scanner proceeds toward outside the effective scan area.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 28, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiichiro Ishihara, Takashi Urakawa
  • Publication number: 20080049289
    Abstract: An optical deflector is disclosed which is capable of preventing unnecessary reflection by a member disposed behind a reflecting portion. The optical deflector includes a substrate portion, a reflecting portion can swing about a swinging motion axis with respect to the substrate portion, and an aperture stop portion which includes an aperture and blocks at least part of a light beam other than a light beam entering the aperture among an incident luminous flux to the optical deflector. The aperture allows passage of the incident luminous flux toward the reflecting portion and that of an emergent luminous flux reflected by the reflecting portion. At least part of an aperture rim of the aperture stop portion has a shape that makes the width of the aperture narrower from a light-beam-incoming side toward a reflecting portion side.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 28, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Urakawa, Keiichiro Ishihara
  • Publication number: 20080036923
    Abstract: A handy image projection apparatus is disclosed in which the relationship between the gravity center position thereof and the position of an operation member is appropriately set. The apparatus includes a main body which projects an image from its front part, and an operation member which is provided on an outer face of the main body. At least part of the operation member is disposed, in a front-rear direction of the apparatus, at one of a position same as the gravity center of the apparatus and a position located at a distance equal to or shorter than ? of the length in the front-rear direction of the apparatus forwardly away from the gravity center.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 14, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Takashi Urakawa
  • Publication number: 20060285216
    Abstract: A scanning display includes a plurality of light sources, and a scanner for scanning lights from the plurality of light sources in two-dimensional directions, wherein the scanner scans the lights from different light sources in two or more partial scanning areas arranged in a first direction in a range corresponding to a whole scanning area, and scans, for each partial scanning area, the light at a first speed in the first direction and at a second speed higher than the first speed in a second direction different from the first direction, and wherein the scanner has the scan frequency of 10 kHz or greater in the second direction.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 21, 2006
    Inventors: Akira Yamamoto, Shuichi Kobayashi, Takashi Urakawa
  • Publication number: 20060280424
    Abstract: Provided is an optical element with a configuration in which distortion due to fixing thereof on an effective optical portion can be reduced, preferably be eliminated and an apparatus including an optical element. The optical element comprising an effective optical portion on which a light beam is incident, a connecting portion with a holding member which holds the optical element, and a recess portion between the connecting portion and the effective optical portion. It is configured that force effecting on the connecting portion is attenuated by the recess portion then transmits to the effective optical portion. The recess portion is configured in groove shape, and the effective optical portion and the connecting portion can be configured different from each other in thickness.
    Type: Application
    Filed: June 8, 2006
    Publication date: December 14, 2006
    Inventor: Takashi Urakawa
  • Publication number: 20060077558
    Abstract: What is disclosed is an eye detection apparatus which can detect the pupil position accurately. The apparatus has an image taking unit that picks up an image of an eye and a pupil detection unit that detects the position of the pupil in the eye based on an image picked up by the image taking portion. The pupil detection unit determines the pupil position based on images picked up by the image taking unit in a plurality of states.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 13, 2006
    Inventors: Takashi Urakawa, Yoshihiro Saito, Akinari Takagi
  • Patent number: 6978478
    Abstract: A mounting unit that can be worn easily and in which size adjustment and lock release can be operated with a natural hand position is disclosed. The mounting unit includes a front frame and a rear frame. The rear frame being connected to the front frame can move in a back and forth direction with respect to the front frame. And the unit includes knob members which are provided on both the right and left portions of the rear frame, for operation of backward movement of the rear frame. Furthermore, the unit includes lock mechanisms which prevent the backward movement of the rear frame with lock release buttons which allow release of the lock of the lock mechanisms. The knob members are arranged under both frames. Each of the lock release buttons is arranged at a portion on each of the knob members where the user pushes with his/her finger when a user will move the rear frame backward with respect to the front frame.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: December 27, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Urakawa, Yoshihiro Saito
  • Publication number: 20050190426
    Abstract: The object of the present invention is to provide an optical scanning apparatus which is not limited in the disposition of a scanning device, can reduce the adherence of dust to each member of the scanning device, and is enhanced in the reliability of the scanning device, and an image displaying apparatus having the same. The optical scanning apparatus includes a housing for containing and holding therein a scanning device provided with a movable mirror, an elastic supporting portion for supporting the movable mirror swingably about a swinging center, and a supporting base for supporting the elastic supporting portion, an optical member OE constituting a first optical system for directing a beam to the scanning device in the housing, and an optical member OX constituting a second optical system for emerging the beam passed through the scanning device.
    Type: Application
    Filed: February 28, 2005
    Publication date: September 1, 2005
    Inventors: Takashi Urakawa, Akira Yamamoto, Keiichiro Ishihara
  • Publication number: 20050179951
    Abstract: Provided is an optical scanner for observing an image that is formed by performing two-dimensional scanning with the aid of a swinging movable mirror, using light beams modulated on the basis of image information and emitted from a light source unit. An optical scanner of the present invention includes a scanning device and a fixing member having an attachment portion for attachment of the scanning device, the scanning device including a movable mirror, an elastic support portion supporting the movable mirror such that the movable mirror can swing around a swinging center, a support base supporting the elastic support portion, and a swinging unit for swinging the movable mirror. A first surface of the attachment portion is formed on a plane of a surface of the movable mirror. A second surface of the attachment portion is formed on a plane which is perpendicular to the surface of the movable mirror and includes the swinging center.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 18, 2005
    Inventor: Takashi Urakawa
  • Publication number: 20050068255
    Abstract: A scanning image displaying apparatus capable of preferably adjusting a diopter is disclosed. The scanning image displaying apparatus includes a light source, a movable diffusing face, an imaging optical system for forming an image of the light source on the diffusing face, scanning means for two-dimensionally scanning the image of the light source formed by the imaging optical system on the diffusing face, an eyepiece optical system for guiding light from the diffusing face to an observer, and a mechanism for moving the light source and/or at least a portion of the imaging optical system in interlocking relationship with the movement of the diffusing face.
    Type: Application
    Filed: September 21, 2004
    Publication date: March 31, 2005
    Inventor: Takashi Urakawa
  • Publication number: 20040003453
    Abstract: A mounting unit that can be worn easily and in which size adjustment and lock release can be operated with a natural hand position is disclosed. The mounting unit includes a front frame and a rear frame. The rear frame being connected to the front frame can move in a back and forth direction with respect to the front frame. And the unit includes knob members which are provided on both the right and left portions of the rear frame, for operation of backward movement of the rear frame. Furthermore, the unit includes lock mechanisms which prevent the backward movement of the rear frame with lock release buttons which allow release of the lock of the lock mechanisms. The knob members are arranged under both frames. Each of the lock release buttons is arranged at a portion on each of the knob members where the user pushes with his/her finger when a user will move the rear frame backward with respect to the front frame.
    Type: Application
    Filed: July 1, 2003
    Publication date: January 8, 2004
    Inventors: Takashi Urakawa, Yoshihiro Saito
  • Patent number: RE40438
    Abstract: A mounting unit that can be worn easily and in which size adjustment and lock release can be operated with a natural hand position is disclosed. The mounting unit includes a front frame and a rear frame. The rear frame being connected to the front frame can move in a back and forth direction with respect to the front frame. And the unit includes knob members which are provided on both the right and left portions of the rear frame, for operation of backward movement of the rear frame. Furthermore, the unit includes lock mechanisms which prevent the backward movement of the rear frame with lock release buttons which allow release of the lock of the lock mechanisms. The knob members are arranged under both frames. Each of the lock release buttons is arranged at a portion on each of the knob members where the user pushes with his/her finger when a user will move the rear frame backward with respect to the front frame.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: July 22, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Urakawa, Yoshihiro Saito