Patents by Inventor Takahiro Sakagami

Takahiro Sakagami 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: 20250123431
    Abstract: An optical filter includes: a dielectric multilayer film 1; a substrate comprising a near-infrared ray absorbing glass and a resin film; and a dielectric multilayer film 2 in this order. The resin film comprises a near-infrared ray absorbing dye and a resin, the near-infrared ray absorbing glass is a fluorophosphate glass containing P, Cu, and F, and the optical filter satisfies all of the spectral characteristics (i-1) to (i-3), (i-5), and (i-13).
    Type: Application
    Filed: December 26, 2024
    Publication date: April 17, 2025
    Applicant: AGC INC.
    Inventors: Takashi NAGATA, Takahiro SAKAGAMI, Kazuhiko SHIONO
  • Publication number: 20250122115
    Abstract: A glass contains ytterbium and has a transmittance of 30% or less for light having a wavelength of 940 nm in terms of a thickness of 0.4 mm. The glass may have a transmittance of 78% or more for light having a wavelength of 850 nm in terms of a thickness of 0.4 mm.
    Type: Application
    Filed: December 23, 2024
    Publication date: April 17, 2025
    Applicant: AGC Inc.
    Inventors: Takahiro SAKAGAMI, Motoshi NAKAYAMA
  • Publication number: 20250116802
    Abstract: An optical filter includes a glass substrate having a first main surface and a second main surface opposite each other and including phosphoric acid glass, a first antireflective layer disposed directly or indirectly on the first main surface of the glass substrate, and a resin layer, containing dye, disposed as one or more layers directly or indirectly on the second main surface of the glass substrate, wherein the glass substrate includes a predetermined range of amount of oxides, wherein the dye has a maximum absorption wavelength in the resin layer at a wavelength range of 690 to 800 nm, wherein thickness of the resin layer is 10 ?m or less, wherein the optical filter has all spectral characteristics specified in (a-1) to (a-6), and wherein a Haze value of the optical filter is 2% or less.
    Type: Application
    Filed: December 19, 2024
    Publication date: April 10, 2025
    Applicant: AGC Inc.
    Inventors: Kazuhiko SHIONO, Takuro SHIMADA, Yuichiro ORITA, Takahiro SAKAGAMI, Takashi NAGATA, Katsushi KAMIJYO
  • Publication number: 20250116803
    Abstract: An optical filter includes a glass substrate having a first main surface, a second main surface opposite the first main surface, and an end surface connecting the first and second main surfaces, the glass substrate being a phosphate glass containing an absorbent, and a first antireflection layer disposed directly or indirectly on the first main surface of the glass substrate, wherein the first main surface of the glass substrate is coated with a first inorganic film, and a second inorganic film is provided directly or indirectly on the second main surface of the glass substrate, with the end surface being coated with a third inorganic film, and wherein the first inorganic film is a film that is closest to the glass substrate among films constituting the first antireflection layer, or a film that is different from a film composed of a plurality of films constituting the first antireflection layer.
    Type: Application
    Filed: December 16, 2024
    Publication date: April 10, 2025
    Applicant: AGC Inc.
    Inventors: Kazuhiko SHIONO, Yayoi YAMAMORI, Takahiro SAKAGAMI, Takashi NAGATA, Katsushi KAMIJYO
  • Patent number: 12271012
    Abstract: A glass for an optical filter, the glass being a phosphate glass including Cu, in which the glass has: an average transmittance of 80% or more at a wavelength of 430 nm to 550 nm; an average transmittance of 2% or less at a wavelength of 800 nm to 950 nm; an average transmittance of 3% or less at a wavelength of 1000 nm to 1200 nm; an average transmittance of 5% or less at a wavelength of 700 nm to 1200 nm; a transmittance of 25% or more at a wavelength of 1550 nm; and a wavelength at which a transmittance is 50% of 615 nm or more in a wavelength range of 600 nm to 800 nm.
    Type: Grant
    Filed: September 30, 2024
    Date of Patent: April 8, 2025
    Assignee: AGC Inc.
    Inventor: Takahiro Sakagami
  • Publication number: 20250052935
    Abstract: An optical filter includes: an absorber including an inorganic material including ytterbium; an absorption layer including a dye and a resin, the dye having a maximum absorption wavelength between 350 nm and 1,200 nm; and a dielectric multilayer film. The absorber may have a flat plate shape, and the absorber may have a thickness of 3 mm or less.
    Type: Application
    Filed: October 22, 2024
    Publication date: February 13, 2025
    Applicant: AGC Inc.
    Inventors: Motoshi NAKAYAMA, Takahiro SAKAGAMI, Takashi NAGATA, Kazuhiko SHIONO
  • Publication number: 20250044490
    Abstract: An optical filter includes: a light-absorbing material X800S having a maximum absorption wavelength in a wavelength region shorter than 800 nm; a light-absorbing material Y850L having a maximum absorption wavelength in a wavelength region longer than 850 nm; and a dielectric multilayer film, in which the optical filter satisfies spectral characteristics (i-1) to (i-5).
    Type: Application
    Filed: October 22, 2024
    Publication date: February 6, 2025
    Applicant: AGC Inc.
    Inventors: Motoshi NAKAYAMA, Takahiro SAKAGAMI, Takashi NAGATA, Kazuhiko SHIONO
  • Publication number: 20250044489
    Abstract: The present invention pertains to an optical filter including: a light-absorbing material Y900-1000 having a maximum absorption wavelength in a wavelength region of 900 nm to 1,000 nm, and a dielectric multilayer film, in which the optical filter satisfies all of spectral characteristics (i-1) to (i-6), and the optical filter may satisfy spectral characteristic (i-7).
    Type: Application
    Filed: October 22, 2024
    Publication date: February 6, 2025
    Applicant: AGC Inc.
    Inventors: Motoshi NAKAYAMA, Takahiro SAKAGAMI, Takashi NAGATA, Kazuhiko SHIONO
  • Publication number: 20250028100
    Abstract: A glass for an optical filter, the glass being a phosphate glass including Cu, in which the glass has: an average transmittance of 80% or more at a wavelength of 430 nm to 550 nm; an average transmittance of 2% or less at a wavelength of 800 nm to 950 nm; an average transmittance of 3% or less at a wavelength of 1000 nm to 1200 nm; an average transmittance of 5% or less at a wavelength of 700 nm to 1200 nm; a transmittance of 25% or more at a wavelength of 1550 nm; and a wavelength at which a transmittance is 50% of 615 nm or more in a wavelength range of 600 nm to 800 nm.
    Type: Application
    Filed: September 30, 2024
    Publication date: January 23, 2025
    Applicant: AGC Inc.
    Inventor: Takahiro SAKAGAMI
  • Publication number: 20240418916
    Abstract: Optical filter-type glass contains a P component, a Cu component, and Mo component, is substantially free of F, and includes: in mass % on an oxide basis, 60% to 75% of P2O5; 9% to 16.5% of Al2O3; 4% to 20% of ?R2O, where R2O is one or more components selected from Li2O, Na2O, K2O, Rb2O, and Cs2O, and ?R2O is a total amount of R2O; 0% to 8% of ?R?O, where R?O is one or more components selected from CaO, MgO, BaO, SrO, and ZnO, and ?R?O is a total amount of R?O; more than 7% up to 20% of CuO; and 0.01% to 1.18% of MoO3.
    Type: Application
    Filed: August 23, 2024
    Publication date: December 19, 2024
    Applicant: AGC Inc.
    Inventor: Takahiro SAKAGAMI
  • Publication number: 20220299687
    Abstract: A near-infrared cut filter includes a transparent substrate having a first and a second surfaces, opposite to each other; and a dielectric multilayer film disposed on a side of the first surface. The dielectric multilayer film reflects light within a wavelength range of 700-750 nm. A mean regular transmittance T1 within a wavelength range of 700-750 nm measured when light is incident in the normal direction from the side of the second surface is 20% or less. A mean regular transmittance T2 within a wavelength range of 600-680 nm measured when light is incident in the normal direction from the side of the second surface is 65% or more. A mean regular reflectance R1 within a wavelength range of 700-750 nm measured when light is incident at an angle of 5° with respect to the normal direction from the side of the second surface is 80% or less.
    Type: Application
    Filed: June 3, 2022
    Publication date: September 22, 2022
    Applicant: AGC Inc.
    Inventor: Takahiro SAKAGAMI
  • Publication number: 20220112121
    Abstract: A near-infrared cut filter glass has: an average transmittance in a wavelength range of 400-550 nm of 50-92%; a transmittance at a wavelength of 700 nm of 40-92%; an average transmittance in a wavelength range of 850-950 nm of 0.0001-70%; and an average transmittance in a wavelength range of 1200-2500 nm of 0.0001-60%.
    Type: Application
    Filed: December 22, 2021
    Publication date: April 14, 2022
    Applicant: AGC INC.
    Inventors: Takahiro SAKAGAMI, Kazuhiko SHIONO
  • Publication number: 20220003896
    Abstract: An optical filter includes a glass substrate in which an average-optical-transmittance in a specific-visible-region defined as a wavelength range of 430 nm to 650 nm is 80% or more and an average-optical-transmittance in a specific-infrared-region defined as a wavelength range of 900 nm to 1,000 nm is 25% to 85%, a first-optical-multilayer film in which an average-optical-transmittance in the specific-visible-region is 80% or more and an average-optical-transmittance in the specific-infrared-region is in a range of 45% to 65%, the first-optical-multilayer film having, between the specific-visible region and the specific-infrared-region, a first-blocking-band that blocks light, and a second-optical-multilayer-film in which an average-optical-transmittance in the specific-visible-region is 80% or more and an average-optical-transmittance in the specific-infrared-region is in a range of 45% to 65%, the second-optical-multilayer film having, on a side of wavelengths longer than those in the specific-infrared-regi
    Type: Application
    Filed: September 22, 2021
    Publication date: January 6, 2022
    Applicant: AGC Inc.
    Inventors: Takashi NAGATA, Takahiro SAKAGAMI
  • Patent number: 10689288
    Abstract: An ultraviolet transmitting glass containing, in mole percentage based on oxides, 55 to 80% of SiO2, 12 to 27% of B2O3, 4 to 20% of R2O (where R represents an alkali metal selected from a group consisting of Li, Na, and K) in total, 0 to 3.5% of Al2O3, 0 to 5% of R?O (where R? represents an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba) in total, 0 to 5% of ZnO, and 0 to 10% of ZrO2, wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more. The glass with high ultraviolet light transmittance, in particular, high deep ultraviolet light transmittance is provided.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: June 23, 2020
    Assignee: AGC Inc.
    Inventors: Takahiro Sakagami, Makoto Shiratori
  • Patent number: 10647607
    Abstract: An ultraviolet transmitting glass containing, in mole percentage based on oxides, 55 to 80% of SiO2, 12 to 27% of B2O3, 4 to 20% of R2O (where R represents an alkali metal selected from a group consisting of Li, Na, and K) in total, 0 to 3.5% of Al2O3, 0 to 5% of R?O (where R? represents an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba) in total, 0 to 5% of ZnO, and 0 to 10% of ZrO2, wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more. The glass with high ultraviolet light transmittance, in particular, high deep ultraviolet light transmittance is provided.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: May 12, 2020
    Assignee: AGC Inc.
    Inventors: Takahiro Sakagami, Makoto Shiratori
  • Patent number: 10252936
    Abstract: A near-infrared cut filter glass includes: P, Al, R (R represents any one or more of Li, Na, and K), R? (R? represents any one or more of Mg, Ca, Sr, Ba, and Zn), and Cu, and not including F practically, wherein (Cu+ amount/total Cu amount)×100[%] is 0.01 to 7.0%. The filter glass may further include, by mol %, 0 to 10% B2O3. The filter glass may have a fracture toughness value of the near-infrared cut filter glass is 0.3 MPa·m1/2 or more. For the filter glass, a quotient obtained by dividing an absorption constant at a wavelength of 430 nm by an absorption constant at a wavelength of 800 nm, of the near-infrared cut filter glass, may be 0.00001 to 0.19.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: April 9, 2019
    Assignee: AGC Inc.
    Inventors: Takahiro Sakagami, Takeshi Yamaguchi, Makoto Shiratori
  • Publication number: 20180215652
    Abstract: An ultraviolet light transmitting glass contains, in molar percentage on an oxide basis, 55% or more and 80% or less of SiO2; 12% or more and 27% or less of B2O3; 4% or more and 20% or less of R2O in total, where R represents at least one alkali metal selected from a group consisting of Li, Na, and K; 0% or more and 5% or less of Al2O3; 0% or more and 5% or less of R?O in total, where R? represents at least one alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba; 0% or more and 5% or less of ZnO; and 1.5% or more and 20% or less of ZrO2. The ultraviolet light transmitting glass with a thickness of 0.5 mm has a transmittance of 70% or more at a wavelength of 254 nm.
    Type: Application
    Filed: March 29, 2018
    Publication date: August 2, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takahiro SAKAGAMI, Makoto SHIRATORI
  • Publication number: 20180170795
    Abstract: A glass includes, in mass percentage on an oxide basis, 50 to 85% of SiO2, 0 to 10% of B2O3, 1 to 20% of Na2O, and 20% or less of K2O, and Sb2O3 is substantially not contained. A total content (Ni+Cr) is more than 0 ppm by mass and 1.2 ppm by mass or less. A total iron oxide (t-Fe2O3) in terms of Fe2O3, a ratio (Na2O/Al2O3) and a total content (Al2O3+K2O) fall within specific ranges, respectively. The contents of each component satisfy a specific relationship.
    Type: Application
    Filed: February 14, 2018
    Publication date: June 21, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takato KAJIHARA, Yusuke ARAI, Naoki KANNO, Takahiro SAKAGAMI
  • Publication number: 20180057393
    Abstract: An ultraviolet transmitting glass containing, in mole percentage based on oxides, 55 to 80% of SiO2, 12 to 27% of B2O3, 4 to 20% of R20 (where R represents an alkali metal selected from a group consisting of Li, Na, and K) in total, 0 to 3.5% of Al2O3, 0 to 5% of R?O (where R? represents an alkaline earth metal selected from a group consisting of Mg, Ca, Sr, and Ba) in total, 0 to 5% of ZnO, and 0 to 10% of ZrO2, wherein transmittance at a wavelength of 254 nm in terms of spectral transmittance at a plate thickness of 0.5 mm is 70% or more. The glass with high ultraviolet light transmittance, in particular, high deep ultraviolet light transmittance is provided.
    Type: Application
    Filed: November 6, 2017
    Publication date: March 1, 2018
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takahiro SAKAGAMI, Makoto SHIRATORI
  • Patent number: 9902647
    Abstract: The present invention relates to a method for producing phase-separated glass, sequentially including a melting step of melting a glass, a phase separation step of separating phases in the glass, and a shaping step of shaping the glass, and to the phase-separated glass obtained by the production method.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: February 27, 2018
    Assignee: ASAHI GLASS COMPANY, LIMITED
    Inventors: Junko Miyasaka, Seiki Ohara, Takahiro Sakagami