Patents by Inventor Shuhei Mikami

Shuhei Mikami 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).

  • Optical glass and optical element
    Patent number: 10071931
    Abstract: Optical glass that has an Abbe number (Vd) of less than 23 and is suitable for use as a single-lens material constituting a photographic-imaging lens; an optical element including the optical glass; and an imaging lens containing a lens including the optical glass. Optical glass that has an Abbe number (Vd) of less than 23, wherein a flat plate of said optical glass with a thickness of 10 mm exhibits an ISO color contribution index (ISO/CCI) of 0 for blue (B), up to 9 for green (G), and up to 9 for red (R).
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: September 11, 2018
    Assignee: HOYA CORPORATION
    Inventor: Shuhei Mikami
  • Optical glass and method for producing the same
    Patent number: 9834465
    Abstract: An optical glass may be a phosphate based glass containing at least any one of oxides selected from TiO2, Nb2O5, WO3, and Bi2O2. The total content (HR) of the TiO2, Nb2O5, WO3, and Bi2O2 may be 35 mol % or above, the noble metal content may be less than 2.0 ppm, and the ?OH value, given by the following general formula, may be 0.1 mm-1 or above: ?OH=?[ln(B/A)]/t.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: December 5, 2017
    Assignee: HOYA CORPORATION
    Inventor: Shuhei Mikami
  • Glass, optical glass, glass raw material for press molding, and optical element
    Patent number: 9828280
    Abstract: A glass including at least one type of oxide selected from TiO2, Nb2O5, WO3, and Bi2O3 as a glass component therefor, having a total TiO2, Nb2O5, WO3, and Bi2O3 content of at least 20 mol %, and having a ?OH value indicated in formula (1) that fulfills the relationship indicated in formula (2). ?OH=?[ln(B/A)]/t??(1); ?OH?0.4891×ln(1/HR)+2.48??(2).
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: November 28, 2017
    Assignee: HOYA CORPORATION
    Inventors: Shuhei Mikami, Yasuhiro Fujiwara
  • Glass and optical element production method
    Patent number: 9604872
    Abstract: [Problem] The transmittance of glass can be dramatically improved as a result of this glass production method. In addition, the amount of rare metal, such as platinum, that melts into glass can be greatly reduced. [Solution] A glass production method whereby the water content in molten glass is increased, in a melting step (i) in which a glass raw material including at least one type of component among TiO2, Nb2O5, WO3, and Bi2O3 is heated inside a melting container and melted, and a molten glass is obtained.
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: March 28, 2017
    Assignee: HOYA CORPORATION
    Inventors: Shuhei Mikami, Yasuhiro Fujiwara
  • OPTICAL GLASS AND OPTICAL ELEMENT
    Publication number: 20160304390
    Abstract: Optical glass that has an Abbe number (Vd) of less than 23 and is suitable for use as a single-lens material constituting a photographic-imaging lens; an optical element including the optical glass; and an imaging lens containing a lens including the optical glass. Optical glass that has an Abbe number (Vd) of less than 23, wherein a flat plate of said optical glass with a thickness of 10 mm exhibits an ISO color contribution index (ISO/CCI) of 0 for blue (B), up to 9 for green (G), and up to 9 for red (R).
    Type: Application
    Filed: December 2, 2014
    Publication date: October 20, 2016
    Applicant: HOYA CORPORATION
    Inventor: Shuhei MIKAMI
  • GLASS, OPTICAL GLASS, GLASS RAW MATERIAL FOR PRESS MOLDING, AND OPTICAL ELEMENT
    Publication number: 20160251257
    Abstract: A glass including at least one type of oxide selected from TiO2, Nb2O5, WO3, and Bi2O3 as a glass component therefor, having a total TiO2, Nb2O5, WO3, and Bi2O3 content of at least 20 mol %, and having a ?OH value indicated in formula (1) that fulfills the relationship indicated in formula (2). ?OH=?[ln(B/A)]/t . . . (1); ?OH?0.4891×ln(1/HR)+2.48 . . . (2).
    Type: Application
    Filed: May 6, 2016
    Publication date: September 1, 2016
    Applicant: HOYA CORPORATION
    Inventors: Shuhei MIKAMI, Yasuhiro FUJIWARA
  • OPTICAL GLASS AND METHOD FOR PRODUCING THE SAME
    Publication number: 20160214881
    Abstract: An optical glass may be a phosphate based glass containing at least any one of oxides selected from TiO2, Nb2O5, WO3, and Bi2O2. The total content (HR) of the TiO2, Nb2O5, WO3, and Bi2O2 may be 35 mol % or above, the noble metal content may be less than 2.0 ppm, and the ?OH value, given by the following general formula, may be 0.1 mm-1 or above: ?OH=?[ln(B/A)]/t.
    Type: Application
    Filed: September 26, 2014
    Publication date: July 28, 2016
    Applicant: HOYA CORPORATION
    Inventor: Shuhei MIKAMI
  • Glass, optical glass, glass raw material for press molding, and optical element
    Patent number: 9359246
    Abstract: A glass including at least one type of oxide selected from TiO2, Nb2O5, WO3, and Bi2O3 as a glass component therefor, having a total TiO2, Nb2O5, WO3, and Bi2O3 content of at least 20 mol %, and having a ?OH value indicated in formula (1) that fulfills the relationship indicated in formula (2). ?OH=?[ln(B/A)]/t??(1); ?OH?0.4891×ln(1/HR)+2.48??(2).
    Type: Grant
    Filed: June 21, 2013
    Date of Patent: June 7, 2016
    Assignee: HOYA CORPORATION
    Inventors: Shuhei Mikami, Yasuhiro Fujiwara
  • GLASS AND OPTICAL ELEMENT PRODUCTION METHOD
    Publication number: 20150218041
    Abstract: [Problem] The transmittance of glass can be dramatically improved as a result of this glass production method. In addition, the amount of rare metal, such as platinum, that melts into glass can be greatly reduced. [Solution] A glass production method whereby the water content in molten glass is increased, in a melting step (i) in which a glass raw material including at least one type of component among TiO2, Nb2O5, WO3, and Bi2O3 is heated inside a melting container and melted, and a molten glass is obtained.
    Type: Application
    Filed: June 21, 2013
    Publication date: August 6, 2015
    Applicant: HOYA CORPORATION
    Inventors: Shuhei Mikami, Yasuhiro Fujiwara
  • GLASS, OPTICAL GLASS, GLASS RAW MATERIAL FOR PRESS MOLDING, AND OPTICAL ELEMENT
    Publication number: 20150203397
    Abstract: A glass including at least one type of oxide selected from TiO2, Nb2O5, WO3, and Bi2O3 as a glass component therefor, having a total TiO2, Nb2O5, WO3, and Bi2O3 content of at least 20 mol %, and having a ?OH value indicated in formula (1) that fulfills the relationship indicated in formula (2). ?OH=?[ln(B/A)]/t??(1); ?OH?0.4891×1n(1/HR)+2.48??(2).
    Type: Application
    Filed: June 21, 2013
    Publication date: July 23, 2015
    Applicant: HOYA CORPORATION
    Inventors: Shuhei Mikami, Yasuhiro Fujiwara
  • Optical glass, preform for precision press molding, and optical element
    Patent number: 8575047
    Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: November 5, 2013
    Assignee: Hoya Corporation
    Inventors: Yasuhiro Fujiwara, Shuhei Mikami, Hiroki Takazawa
  • OPTICAL GLASS, PREFORM FOR PRECISION PRESS MOLDING, AND OPTICAL ELEMENT
    Publication number: 20120309605
    Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 6, 2012
    Applicant: HOYA CORPORATION
    Inventors: Yasuhiro FUJIWARA, Shuhei MIKAMI, Hiroki TAKAZAWA
  • Optical glass, preform for precision press molding, and optical element
    Patent number: 8288299
    Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: October 16, 2012
    Assignee: Hoya Corporation
    Inventors: Yasuhiro Fujiwara, Shuhei Mikami, Hiroki Takazawa
  • OPTICAL GLASS, PREFORM FOR PRECISION PRESS MOLDING, AND OPTICAL ELEMENT
    Publication number: 20110143907
    Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.
    Type: Application
    Filed: February 3, 2010
    Publication date: June 16, 2011
    Applicant: HOYA CORPORATION
    Inventors: Yasuhiro Fujiwara, Shuhei Mikami, Hiroki Takazawa