Patents by Inventor Kazuhiko Kawasaki

Kazuhiko Kawasaki 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).

  • Publication number: 20190375275
    Abstract: A vehicle windshield includes a window plate and an anti-fogging film provided on an interior side surface of the window plate, with a first region and a second region within a see-through region. The anti-fogging film is not on the first region but on the second region. The first region includes a belt-like region in an upper portion of the see-through region. The second region is a region that includes at least a test area B and that includes a continuous projection portion provided on an upper side. The anti-fogging film in the second region has a minimum film thickness of no less than 5 ?m. At least a boundary between the first region and the second region excluding the projection portion has no perspective distortion and is formed by a boundary line having a linewidth of 10-200 ?m that is visually recognized by scattering of incoming light.
    Type: Application
    Filed: August 23, 2019
    Publication date: December 12, 2019
    Applicant: AGC INC.
    Inventors: Tetsuji IRIE, Nana SATO, Kazuhiko KAWASAKI, Hideyuki SAITO, Naoki OGAWA
  • Patent number: 10444004
    Abstract: The phase shift interferometer is configured to measure the shapes of measurement objects by acquiring a plurality of images of interference fringes while shifting the phases of the interference fringes. The interference fringes are provided with a phase difference of 90° relative to each other utilizing polarization of light. Images of the interference fringes are captured by two respective cameras while, in accordance with a conventional phase shift method, mechanically displacing a reference surface or a reference optical path to shift the phases. The phases of the interference fringes are calculated independently from the respective images acquired by the cameras and an average of the two phase calculation results is calculated.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: October 15, 2019
    Assignee: MITUTOYO CORPORATION
    Inventor: Kazuhiko Kawasaki
  • Patent number: 10333174
    Abstract: The present invention relates to a lithium ion secondary battery comprising a positive electrode having a coating amount per unit area of 50 mg/cm2 or more and an electrode density of 3.3 g/cc or more and a negative electrode having a coating amount per unit area of 24 mg/cm2 or more and an electrode density of 1.5 g/cc or more, a separator having a shrinking ratio of 2% or less by heat treatment at 80° C. for 6 hours, and an electrolyte solution comprising at least one sulfonic acid ester compound, and a ratio of a sulfur content in the central portion (As) and a sulfur content in the edge portion (Bs) of the positive electrode and the negative electrode, in each, is 0.7?As/Bs?1.1.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 25, 2019
    Assignee: NEC Corporation
    Inventors: Daisuke Kawasaki, Kenichi Shimura, Noboru Yoshida, Kazuhiko Inoue, Jiro Iriyama
  • Patent number: 10161805
    Abstract: To measure the frequency of a laser, the frequency of a beat signal that is generated by the interference between an optical frequency comb, used as the reference of measurement, and the laser to be measured is measured. In such a laser frequency measurement using the optical frequency comb, at least one of a repetition frequency and a CEO frequency of the optical frequency comb is changed so that the frequency of the beat signal becomes a predetermined value, and the frequency of the beat signal is measured, so that the frequency of the laser is measured. This allows measurement of the frequency of laser having large frequency variation and low stability.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: December 25, 2018
    Assignee: Mitutoyo Corporation
    Inventor: Kazuhiko Kawasaki
  • Patent number: 10088291
    Abstract: An instantaneous phase-shift interferometer uses a light source having a coherence length shorter than a difference in optical path length between the light reflected from a reference surface and the light reflected from a measured surface. A beam from the light source is split and, using an adjustable delay optical path, a first beam is delayed to cause a difference in optical path length and is superimposed on the same optical axis as a second beam, after which the reference beam and the measurement beam are generated. The optical path length of the delay optical path is changed during adjustment, a plurality of interference fringe images are individually captured, and at least one of a bias, amplitude, and phase shift amount of the interference fringes obtained in each of the interference fringe images is calculated. A shape of a measured object is measured based on bias calculation results, amplitude calculation results, and phase shift amount calculation results.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: October 2, 2018
    Assignee: MITUTOYO CORPORATION
    Inventors: Kazuhiko Kawasaki, Shinpei Matsuura
  • Publication number: 20180224335
    Abstract: To measure the frequency of a laser, the frequency of a beat signal that is generated by the interference between an optical frequency comb, used as the reference of measurement, and the laser to be measured is measured. In such a laser frequency measurement using the optical frequency comb, at least one of a repetition frequency and a CEO frequency of the optical frequency comb is changed so that the frequency of the beat signal becomes a predetermined value, and the frequency of the beat signal is measured, so that the frequency of the laser is measured. This allows measurement of the frequency of laser having large frequency variation and low stability.
    Type: Application
    Filed: April 2, 2018
    Publication date: August 9, 2018
    Inventor: Kazuhiko Kawasaki
  • Patent number: 9995634
    Abstract: To measure the frequency of a laser, the frequency of a beat signal that is generated by the interference between an optical frequency comb, used as the reference of measurement, and the laser to be measured is measured. In such a laser frequency measurement using the optical frequency comb, at least one of a repetition frequency and a CEO frequency of the optical frequency comb is changed so that the frequency of the beat signal becomes a predetermined value, and the frequency of the beat signal is measured, so that the frequency of the laser is measured. This allows measurement of the frequency of laser having large frequency variation and low stability.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: June 12, 2018
    Assignee: MITUTOYO CORPORATION
    Inventor: Kazuhiko Kawasaki
  • Publication number: 20180128593
    Abstract: The phase shift interferometer is configured to measure the shapes of measurement objects by acquiring a plurality of images of interference fringes while shifting the phases of the interference fringes. The interference fringes are provided with a phase difference of 90° relative to each other utilizing polarization of light. Images of the interference fringes are captured by two respective cameras while, in accordance with a conventional phase shift method, mechanically displacing a reference surface or a reference optical path to shift the phases. The phases of the interference fringes are calculated independently from the respective images acquired by the cameras and an average of the two phase calculation results is calculated.
    Type: Application
    Filed: October 12, 2017
    Publication date: May 10, 2018
    Inventor: Kazuhiko Kawasaki
  • Publication number: 20170016711
    Abstract: An instantaneous phase-shift interferometer uses a light source having a coherence length shorter than a difference in optical path length between the light reflected from a reference surface and the light reflected from a measured surface. A beam from the light source is split and, using an adjustable delay optical path, a first beam is delayed to cause a difference in optical path length and is superimposed on the same optical axis as a second beam, after which the reference beam and the measurement beam are generated. The optical path length of the delay optical path is changed during adjustment, a plurality of interference fringe images are individually captured, and at least one of a bias, amplitude, and phase shift amount of the interference fringes obtained in each of the interference fringe images is calculated. A shape of a measured object is measured based on bias calculation results, amplitude calculation results, and phase shift amount calculation results.
    Type: Application
    Filed: June 23, 2016
    Publication date: January 19, 2017
    Applicant: MITUTOYO CORPORATION
    Inventors: Kazuhiko KAWASAKI, Shinpei MATSUURA
  • Publication number: 20160011055
    Abstract: To measure the frequency of a laser, the frequency of a beat signal that is generated by the interference between an optical frequency comb, used as the reference of measurement, and the laser to be measured is measured. In such a laser frequency measurement using the optical frequency comb, at least one of a repetition frequency and a CEO frequency of the optical frequency comb is changed so that the frequency of the beat signal becomes a predetermined value, and the frequency of the beat signal is measured, so that the frequency of the laser is measured. This allows measurement of the frequency of laser having large frequency variation and low stability.
    Type: Application
    Filed: July 6, 2015
    Publication date: January 14, 2016
    Inventor: Kazuhiko Kawasaki
  • Patent number: 8490965
    Abstract: A sheet-supplying device has a sheet-accommodating tray, a raising/lowering unit, a first position sensor, a second position sensor, a controlling unit. The raising/lowering unit raises and lowers the sheet-accommodating tray substantially. The first position sensor detects a first position indicating a position in the stacked direction of one end portion of a topmost sheet stacked in the sheet-accommodating tray. The second position sensor detects a second position indicating a position in the stacked direction of another end portion of the topmost sheet. The controlling unit controls the raising/lowering unit to raise or lower the sheet-accommodating tray based on both the first position detected by the first position sensor and the second position detected by the second position sensor so that one end of the topmost sheet in the stacked status is positioned at a prescribed position in the stacked direction.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: July 23, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Ueda, Shingo Takai, Tatsuo Matsuda, Kazuhiko Kawasaki
  • Patent number: 8403319
    Abstract: A sheet-supplying device has a sheet-accommodating tray, a raising/lowering unit, a first position sensor, a second position sensor, a controlling unit. The raising/lowering unit raises and lowers the sheet-accommodating tray substantially. The first position sensor detects a first position indicating a position in the stacked direction of one end portion of a topmost sheet stacked in the sheet-accommodating tray. The second position sensor detects a second position indicating a position in the stacked direction of another end portion of the topmost sheet. The controlling unit controls the raising/lowering unit to raise or lower the sheet-accommodating tray based on both the first position detected by the first position sensor and the second position detected by the second position sensor so that one end of the topmost sheet in the stacked status is positioned at a prescribed position in the stacked direction.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: March 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Ueda, Shingo Takai, Tatsuo Matsuda, Kazuhiko Kawasaki
  • Patent number: 8368900
    Abstract: The oscillation wavelength of a variable wavelength laser is measured by using an optical comb, and a feedback control is performed, whereby laser beams of plural predetermined wavelengths are obtained, or a variable wavelength laser is caused to oscillate at plural arbitrary wavelengths to obtain plural distance measurement values. The wavelengths (frequencies) of laser beams when the respective distance measurement values are obtained are measured by the optical comb, and used in calculation of the geometric distance. Plural lasers are used, and the geometric distance is obtained while the wavelengths of laser beams oscillated from the lasers are measured by the optical comb.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: February 5, 2013
    Assignee: Mitutoyo Corporation
    Inventors: Kazuhiko Kawasaki, Kaoru Miyata
  • Patent number: 8314940
    Abstract: A probe microscope includes a cantilever having a probe for contact with an object, first and second displacement detection optical systems, and an object lens. The first displacement detection optical system includes a first light source and a first displacement detecting section that detects displacement of the cantilever. The second displacement detection optical system includes a second light source and a second displacement detecting section that detects displacement of the object. The object lens is provided between the cantilever and the first light source and between the cantilever and the second light source. The object lens has a focal position for the light that is emitted from the first light source and has a first wavelength at the position of the cantilever and has a focal position for the light that is emitted from the second light source and has a second wavelength at the position of the object.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: November 20, 2012
    Assignee: Mitutoyo Corporation
    Inventors: Yoshimasa Suzuki, Kazuhiko Kawasaki, Satoshi Koga
  • Publication number: 20120153560
    Abstract: A sheet-supplying device has a sheet-accommodating tray, a raising/lowering unit, a first position sensor, a second position sensor, a controlling unit. The raising/lowering unit raises and lowers the sheet-accommodating tray substantially. The first position sensor detects a first position indicating a position in the stacked direction of one end portion of a topmost sheet stacked in the sheet-accommodating tray. The second position sensor detects a second position indicating a position in the stacked direction of another end portion of the topmost sheet. The controlling unit controls the raising/lowering unit to raise or lower the sheet-accommodating tray based on both the first position detected by the first position sensor and the second position detected by the second position sensor so that one end of the topmost sheet in the stacked status is positioned at a prescribed position in the stacked direction.
    Type: Application
    Filed: February 24, 2012
    Publication date: June 21, 2012
    Inventors: Satoshi Ueda, Shingo Takai, Tatsuo Matsuda, Kazuhiko Kawasaki
  • Patent number: 8108942
    Abstract: A probe microscope includes a cantilever having a probe, a displacement detecting optical system, an observation optical system, an objective lens, and a parallel glass. The displacement detecting optical system includes a first light source and a light detecting element. The observation optical system includes a second light source, an image forming lens, and a camera. The objective lens is disposed between the cantilever and the first and second light sources, and is commonly used by the displacement detecting optical system and the observation optical system. The parallel glass is capable of being inserted and retracted freely between the cantilever and the objective lens to adjust a focal point of the objective lens.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: January 31, 2012
    Assignee: Mitutoyo Corporation
    Inventors: Yoshimasa Suzuki, Kazuhiko Kawasaki, Satoshi Koga
  • Patent number: 8041277
    Abstract: An image forming apparatus includes a guide member configured to guide a sheet to a nip section between a heating roller and a pressing roller disposed close to the upstream side of the rollers and on the pressing roller side. A downstream end of the guide member is disposed on the heating roller side with respect to the nip surface between the rollers so that a header of the sheet to be printed is in contact with the heating roller first, and a downstream end of the fixing device introduction guide member is concavely curved.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: October 18, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasushi Hashimoto, Motoji Kurobane, Masami Takeshita, Kazuhiko Kawasaki
  • Patent number: 7907288
    Abstract: A shape measuring apparatus includes a probe for scanning across a surface to be measured, while vibrating up and down; a minute-vibration generation section for vibrating the probe up and down; a vertical movement control section for moving the probe up and down to keep a constant contact force or a constant distance between the surface to be measured and the probe; a scanning section for scanning the surface to be measured with the probe; a displacement sensor for measuring the vertical displacement of the probe and outputting a probe displacement signal; and a signal processing section for obtaining information about the contact force or the distance between the surface to be measured and the probe from a high-frequency component of the probe displacement signal, and for obtaining information about profile of the surface to be measured from a low-frequency component of the signal obtained when the surface to be measured is scanned such that the distance or the contact force is kept constant.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: March 15, 2011
    Assignee: Mitutoyo Corporation
    Inventors: Kazuhiko Kawasaki, Satoshi Koga, Yoshimasa Suzuki
  • Patent number: 7872420
    Abstract: In a metal halide lamp having a rated lamp wattage of greater than or equal to 450 W, which includes: a translucent ceramic arc tube enclosure including: a main tube inside which a discharge space is formed; and two narrow tubes having smaller diameter than the main tube, each connected to either end of the main tube; two electrodes; and a metal halide provided inside the arc tube enclosure, in which one of the two electrodes is disposed so that it protrudes inside the main tube from inside of one of the two narrow tubes, and the other one of the two electrodes is disposed so that it protrudes inside the main tube from the other one of the two narrow tubes, and when the rated lamp wattage is denoted by W (watt), an inside diameter of the main tube by D (mm), an electrode protruding length which is the distance from boundary between the main tube and the narrow tubes to an end of the electrode by L (mm), and the distance between ends of the two electrodes by E (mm), a bulb wall loading G (watt/cm2) represented
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: January 18, 2011
    Assignee: GS Yuasa International Ltd.
    Inventors: Kazuhiko Kawasaki, Shinji Taniguchi, Kuniaki Nakano
  • Publication number: 20110007324
    Abstract: A probe microscope includes a cantilever having a probe for contact with an object, first and second displacement detection optical systems, and an object lens. The first displacement detection optical system includes a first light source and a first displacement detecting section that detects displacement of the cantilever. The second displacement detection optical system includes a second light source and a second displacement detecting section that detects displacement of the object. The object lens is provided between the cantilever and the first light source and between the cantilever and the second light source. The object lens has a focal position for the light that is emitted from the first light source and has a first wavelength at the position of the cantilever and has a focal position for the light that is emitted from the second light source and has a second wavelength at the position of the object.
    Type: Application
    Filed: July 7, 2010
    Publication date: January 13, 2011
    Applicant: MITUTOYO CORPORATION
    Inventors: Yoshimasa Suzuki, Kazuhiko Kawasaki, Satoshi Koga