Patents by Inventor Kazuyoshi Ishii
Kazuyoshi Ishii 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).
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Patent number: 9885675Abstract: An ionizing radiation detection apparatus of the present disclosure includes a first drift electrode disposed inside a chamber and a first detection unit disposed inside the chamber so as to oppose the first drift electrode, wherein the first detection unit is configured to detect a first ionization electron produced through Compton scattering caused by an incident ?-ray inside the scattering gas, and a second drift electrode configured to emit a reference X-ray upon being excited by the incident ?-ray with a second detection unit disposed so as to oppose the second drift electrode and configured to detect a second ionization electron produced as the reference X-ray is photoelectrically absorbed by the scattering gas, and a control unit configured to compensate for a change in an amplification factor of a signal output from each of the first detection unit and the second detection unit.Type: GrantFiled: May 17, 2016Date of Patent: February 6, 2018Assignee: Canon Kabushiki KaishaInventors: Ikuo Watanabe, Kazuyoshi Ishii
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Publication number: 20160341676Abstract: An ionizing radiation detection apparatus of the present disclosure includes a first drift electrode disposed inside a chamber and a first detection unit disposed inside the chamber so as to oppose the first drift electrode, wherein the first detection unit is configured to detect a first ionization electron produced through Compton scattering caused by an incident ?-ray inside the scattering gas, and a second drift electrode configured to emit a reference X-ray upon being excited by the incident ?-ray with a second detection unit disposed so as to oppose the second drift electrode and configured to detect a second ionization electron produced as the reference X-ray is photoelectrically absorbed by the scattering gas, and a control unit configured to compensate for a change in an amplification factor of a signal output from each of the first detection unit and the second detection unit.Type: ApplicationFiled: May 17, 2016Publication date: November 24, 2016Inventors: Ikuo Watanabe, Kazuyoshi Ishii
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Publication number: 20160341833Abstract: An ionizing radiation detection apparatus of the present disclosure includes a first chamber holding a scattering gas thereinside; a first drift plane disposed inside the first chamber; a first electron detection unit disposed inside the first chamber so as to oppose the first drift plane; a second chamber connected to the first chamber, the second chamber holding the scattering gas thereinside; a second drift plane disposed inside the second chamber; a second electron detection unit disposed inside the second chamber so as to oppose the second drift plane; a calibration radiation source; and a control unit configured to compensate for a change in a multiplication factor of a signal output from each of the first electron detection unit and the second electron detection unit.Type: ApplicationFiled: May 17, 2016Publication date: November 24, 2016Inventors: Ikuo Watanabe, Yoshikatsu Ichimura, Kazuyoshi Ishii, Mitsuaki Amemiya
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Publication number: 20160291174Abstract: A charged particle detecting device according to the present invention includes an electron detecting portion, a signal processing portion, a selection portion, an accumulation portion configured to accumulate information on a muon, and a computation portion. The electron detecting portion detects an ionized electron generated along a trajectory of a charged particle flying within a scatterer. The signal processing portion processes a signal detected by the electron detecting portion, to thereby acquire information on the charged particle. The selection portion selects information on a muon from the information on the charged particle detected by the signal processing portion. The computation portion acquires a coefficient for sensitivity in detection of the information on the charged particle based on the accumulated information on the muon.Type: ApplicationFiled: January 27, 2015Publication date: October 6, 2016Inventor: Kazuyoshi Ishii
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Patent number: 7855939Abstract: An optical disk apparatus that includes a movable part having an objective lens for focusing a laser beam onto an optical disk. A lens-holding member holds the objective lens. A protecting member prevents contact of the objective lens with the optical disk. An elastic supporting member supports the movable part, and an actuator drives the movable part toward or apart from the optical disk. The apparatus is constructed not to cause contact of the protecting member with the optical disk in a non-working state of the actuator, even when the elastic supporting member is bent by gravity toward the optical disk.Type: GrantFiled: May 4, 2010Date of Patent: December 21, 2010Assignee: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Patent number: 7839730Abstract: An optical pickup includes an objective lens, a protection member for protecting the objective lens, and a lens holding member configured to hold these members. The optical pickup records and/or reproduces an information signal on and/or from an optical recording medium by condensing laser light through the objective lens. The protection member includes a bearing surface to contact a surface of an edge portion of the objective lens not facing the optical recording medium, an aperture to control a diameter of laser light to be incident on the objective lens, and a protection portion protruding toward the optical recording medium with respect to the objective lens. The bearing surface, the aperture, and the protection portion are integrally formed with one another.Type: GrantFiled: August 22, 2008Date of Patent: November 23, 2010Assignee: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Patent number: 7804745Abstract: An optical disk device for driving an optical disk having a rotation center and a recording track around the rotation center. The device includes a light source which emits a light beam, an objective lens which irradiates a position on the recording track of the optical disk with the light beam from the light source, and a lens holding member which holds the objective lens. The lens holding member has a plurality of fitting sections. A plurality of elastic supporting members each has a longitudinal length and is fitted at one end thereof to one of the fitting sections of the lens holding member, and a supporting unit base has a plurality of anchor sections supporting the other end of each of the elastic supporting members.Type: GrantFiled: June 15, 2007Date of Patent: September 28, 2010Assignee: Canon Kabushiki KaishaInventors: Kazuyoshi Ishii, Yoshikazu Asai
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Patent number: 7796313Abstract: A process for recording information on and reproducing information from a reflection-type holographic information recording medium, having a reflecting layer. Recording includes (i) branching a light beam from a light source into a first branched light beam and a second branched light beam, (ii) forming an information light beam from the first branched light beam by modulation with a spatial light modulation element, and (iii) recording the information by forming an interference fringe by projecting the second branched light beam as a recording reference light beam together with the information light beam onto the recording medium. Reproducing includes projecting a light beam from the light source as a reproducing reference light beam onto the interference fringe. An angle of incidence of the recording reference light beam and an angle of incidence of the reproducing reference light beam into the interference fringe are one hundred eighty degrees from one another.Type: GrantFiled: September 28, 2007Date of Patent: September 14, 2010Assignee: Canon Kabushiki KaishaInventors: Haruhiko Horiguchi, Kazuyoshi Ishii
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Publication number: 20100214886Abstract: An optical disk apparatus that includes a movable part having an objective lens for focusing a laser beam onto an optical disk. A lens-holding member holds the objective lens. A protecting member prevents contact of the objective lens with the optical disk. An elastic supporting member supports the movable part, and an actuator drives the movable part toward or apart from the optical disk. The apparatus is constructed not to cause contact of the protecting member with the optical disk in a non-working state of the actuator, even when the elastic supporting member is bent by gravity toward the optical disk.Type: ApplicationFiled: May 4, 2010Publication date: August 26, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Kazuyoshi Ishii
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Patent number: 7729213Abstract: An optical disk apparatus includes a movable part having an objective lens for focusing a laser beam onto an optical disk. A lens-holding member holds the objective lens. A protecting member prevents contact of the objective lens with the optical disk. The protecting member is spaced apart from the optical disk. An elastic supporting member supports the movable part, and an actuator drives the movable part toward or away from the optical disk. The apparatus is constructed so as to maintain the protecting member spaced apart from the optical disk, even when the elastic supporting member is bent by gravity toward the optical disk.Type: GrantFiled: June 21, 2005Date of Patent: June 1, 2010Assignee: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Patent number: 7570546Abstract: An optical pick-up including an objective lens for collecting/irradiating laser light onto an optical disk, and an objective lens holding member for holding the objective lens. A plurality of cutout portions for injecting therein an adhesive for fixing the objective lens are provided on a side of the objective lens holding member opposite to a side thereof facing the optical disk and at the cut out portions. An adhesive is filled in a gap between a surface of the edge of the objective lens perpendicular to the optical disk and a portion of the objective lens holding member opposing the surface. A projection member is disposed on a surface of the edge opposing the optical disk and on a side of the gap opposing the optical disk.Type: GrantFiled: April 7, 2006Date of Patent: August 4, 2009Assignee: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Patent number: 7515356Abstract: A protection member for preventing the contact of an objective lens with an optical disk is a thin plate member composed of an elastic material softer than a cover layer of the optical disk and has a plurality of convex-shaped parts formed on a surface thereof, which is opposed to the optical disk, so as to surround the objective lens.Type: GrantFiled: July 21, 2006Date of Patent: April 7, 2009Assignee: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Publication number: 20090073855Abstract: An optical pickup includes an objective lens, a protection member for protecting the objective lens, and a lens holding member configured to hold these members. The optical pickup records and/or reproduces an information signal on and/or from an optical recording medium by condensing laser light through the objective lens. The protection member includes a bearing surface to contact a surface of an edge portion of the objective lens not facing the optical recording medium, an aperture to control a diameter of laser light to be incident on the objective lens, and a protection portion protruding toward the optical recording medium with respect to the objective lens. The bearing surface, the aperture, and the protection portion are integrally formed with one another.Type: ApplicationFiled: August 22, 2008Publication date: March 19, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Kazuyoshi Ishii
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Publication number: 20080084593Abstract: An optical information recording-reproduction process is provide in which a reflection type holographic memory disk is used and light receiving element and other elements are placed on the side of light-projection of the holographic memory disk. Thereby, the apparatus can be made smaller in its thickness.Type: ApplicationFiled: September 28, 2007Publication date: April 10, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Haruhiko Horiguchi, Kazuyoshi Ishii
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Patent number: 7333402Abstract: A suspension supporting a magnetic head is formed by a member different in material from gimbals. As a result, the characteristic of the gimbals minimizing electric power loss in supplying current while sufficiently elastically holding the magnetic head can be compatible with the characteristic of suspension suppressing variation and impact from the outside or rotational displacement although both characteristics are different from each other. This allows the displacement of the magnetic head caused by the vibration and the impact from the outside or the horizontal displacement associated with the vertical displacement of a recording medium to be decreased, so that inductance of the magnetic head can be decreased and recording speed can be improved.Type: GrantFiled: January 21, 2004Date of Patent: February 19, 2008Assignee: Canon Kabushiki KaishaInventors: Kazuyoshi Ishii, Kazunori Suzuki
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Publication number: 20080013413Abstract: In an optical disk device, a plurality of elastic supporting members movably support a lens holding member which holds an objective lens constituting an optical pick up. The elastic supporting members are arranged in parallel to each other such that the elastic supporting members 20b1, 20b2 arranged at the outer peripheral side of the optical disk are fitted at a forward position of the lens holding member 18 and the elastic supporting members 20a1, 20a2 arranged at the inner peripheral side of the optical disk are fitted at a rearward position of the lens holding member 18. With this arrangement, the extent to which the optical pickup projects outward from the outer edge of the optical disk is reduced.Type: ApplicationFiled: June 15, 2007Publication date: January 17, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Kazuyoshi Ishii, Yoshikazu Asai
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Publication number: 20070047423Abstract: A protection member for preventing the contact of an objective lens with an optical disk is a thin plate member composed of an elastic material softer than a cover layer of the optical disk and has a plurality of convex-shaped parts formed on a surface thereof, which is opposed to the optical disk, so as to surround the objective lens.Type: ApplicationFiled: July 21, 2006Publication date: March 1, 2007Applicant: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Publication number: 20060233090Abstract: In order to reduce attachment of an adhesive to a disk-side surface of a protection member or an objective lens during an adhesion step, there is provided an optical pick-up, which includes an objective lens for collecting/irradiating a laser light to an optical disk, and an objective lens holding member for holding the objective lens, wherein a plurality of cutout portions for injecting therein an adhesive for fixing the objective lens are provided in a side of the objective lens holding member opposite to a side thereof facing the optical disk.Type: ApplicationFiled: April 7, 2006Publication date: October 19, 2006Applicant: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Publication number: 20050281148Abstract: Protecting member is provided on lens-holding member to protrude toward optical disk more than objective lens. Further protecting member is prevented from contact with cover layer, even when movable part is not driven by actuator and elastic supporting members are bent by gravity acting on movable part toward optical disk.Type: ApplicationFiled: June 21, 2005Publication date: December 22, 2005Applicant: Canon Kabushiki KaishaInventor: Kazuyoshi Ishii
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Patent number: 6909673Abstract: The magneto-optical recording apparatus of the present invention comprises: a magnetic head of which one end is fixed and of which the other end is free and provided with a magnetic field generating portion for applying a magnetic field onto a magneto-optical recording medium; an optical pickup, provided opposite the magnetic head with the recording medium between them, for irradiating a portion applied with a magnetic field from the magnetic head with a light beam; and a member for regulating displacement of the magnetic head in a direction parallel to a magneto-optical recording medium surface.Type: GrantFiled: February 20, 2003Date of Patent: June 21, 2005Assignee: Canon Kabushiki KaishaInventors: Kazuyoshi Ishii, Shinnosuke Torii