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).
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Publication number: 20220299687Abstract: 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: ApplicationFiled: June 3, 2022Publication date: September 22, 2022Applicant: AGC Inc.Inventor: Takahiro SAKAGAMI
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Publication number: 20220112121Abstract: 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: ApplicationFiled: December 22, 2021Publication date: April 14, 2022Applicant: AGC INC.Inventors: Takahiro SAKAGAMI, Kazuhiko SHIONO
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Publication number: 20220003896Abstract: 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-regiType: ApplicationFiled: September 22, 2021Publication date: January 6, 2022Applicant: AGC Inc.Inventors: Takashi NAGATA, Takahiro SAKAGAMI
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Patent number: 10689288Abstract: 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: GrantFiled: November 6, 2017Date of Patent: June 23, 2020Assignee: AGC Inc.Inventors: Takahiro Sakagami, Makoto Shiratori
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Patent number: 10647607Abstract: 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: GrantFiled: November 6, 2017Date of Patent: May 12, 2020Assignee: AGC Inc.Inventors: Takahiro Sakagami, Makoto Shiratori
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Patent number: 10252936Abstract: 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: GrantFiled: October 17, 2017Date of Patent: April 9, 2019Assignee: AGC Inc.Inventors: Takahiro Sakagami, Takeshi Yamaguchi, Makoto Shiratori
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Publication number: 20180215652Abstract: 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: ApplicationFiled: March 29, 2018Publication date: August 2, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takahiro SAKAGAMI, Makoto SHIRATORI
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Publication number: 20180170795Abstract: 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: ApplicationFiled: February 14, 2018Publication date: June 21, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takato KAJIHARA, Yusuke ARAI, Naoki KANNO, Takahiro SAKAGAMI
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Publication number: 20180057393Abstract: 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: ApplicationFiled: November 6, 2017Publication date: March 1, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takahiro SAKAGAMI, Makoto SHIRATORI
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Patent number: 9902647Abstract: 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: GrantFiled: December 30, 2016Date of Patent: February 27, 2018Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Junko Miyasaka, Seiki Ohara, Takahiro Sakagami
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Patent number: 9896375Abstract: A colored glass, a surface of which is roughened in whole or in part. In the colored glass, an average value of gloss values measured at 9 points in the surface thereof at an incident angle of 60° in accordance with JIS 28741 (1991) is 30 or less, a ratio of a difference between a maximum gloss value and a minimum gloss value to the maximum gloss value is 20% or less, and a minimum value of visible-light transmittance at a thickness of 0.8 mm is 70% or less.Type: GrantFiled: July 1, 2014Date of Patent: February 20, 2018Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Yoshitaka Saijo, Mitsuru Wakatsuki, Takahiro Sakagami
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Publication number: 20180037492Abstract: 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: ApplicationFiled: October 17, 2017Publication date: February 8, 2018Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takahiro SAKAGAMI, Takeshi YAMAGUCHI, Makoto SHIRATORI
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Publication number: 20170320294Abstract: A glass laminate includes a glass substrate; and an anti-reflection layer laminated on the glass substrate and a minimum of absorbances of the glass laminate in wavelengths of 380 to 780 nm is 0.01 or more.Type: ApplicationFiled: July 27, 2017Publication date: November 9, 2017Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hiroyuki YAMAMOTO, Takahiro SAKAGAMI, Tomoharu HASEGAWA, Chika YASUI
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Patent number: 9771300Abstract: A white glass contains, in terms of mole percentage on the basis of the following oxides, from 50 to 80% of SiO2, from 0 to 10% of Al2O3, from 11 to 30% of MgO, from 0 to 15% of Na2O and from 0.5 to 15% of P2O5.Type: GrantFiled: January 23, 2015Date of Patent: September 26, 2017Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Takahiro Sakagami, Seiki Ohara, Junko Miyasaka, Hiroyuki Hijiya, Kazutaka Ono
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Publication number: 20170107142Abstract: 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: ApplicationFiled: December 30, 2016Publication date: April 20, 2017Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Junko MIYASAKA, Seiki Ohara, Takahiro Sakagami
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Patent number: 9580353Abstract: 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: GrantFiled: April 13, 2015Date of Patent: February 28, 2017Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Junko Miyasaka, Seiki Ohara, Takahiro Sakagami
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Patent number: 9487440Abstract: A process for producing a chemically strengthened glass is provided. The method for producing a chemically strengthened glass includes subjecting a phase-separated glass to an ion exchange treatment. A chemically strengthened glass which is obtained by the process and a phase-separated glass which has been subjected to the ion exchange treatment are also provided.Type: GrantFiled: October 27, 2014Date of Patent: November 8, 2016Assignee: ASAHI GLASS COMPANY, LIMITEDInventors: Junko Miyasaka, Takahiro Sakagami, Seiki Ohara, Kosho Akatsuka, Manuel Reyes Diaz, Kazutaka Ono, Hiroyuki Hijiya
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Publication number: 20150291469Abstract: 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: ApplicationFiled: April 13, 2015Publication date: October 15, 2015Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Junko MIYASAKA, Seiki Ohara, Takahiro Sakagami
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Publication number: 20150140336Abstract: A white glass contains, in terms of mole percentage on the basis of the following oxides, from 50 to 80% of SiO2, from 0 to 10% of Al2O3, from 11 to 30% of MgO, from 0 to 15% of Na2O and from 0.5 to 15% of P2O5.Type: ApplicationFiled: January 23, 2015Publication date: May 21, 2015Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takahiro SAKAGAMI, Seiki OHARA, Junko MIYASAKA, Hiroyuki HIJIYA, Kazutaka ONO
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Publication number: 20150111030Abstract: A process for producing a chemically strengthened glass is provided. The method for producing a chemically strengthened glass includes subjecting a phase-separated glass to an ion exchange treatment. A chemically strengthened glass which is obtained by the process and a phase-separated glass which has been subjected to the ion exchange treatment are also provided.Type: ApplicationFiled: October 27, 2014Publication date: April 23, 2015Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Junko MIYASAKA, Takahiro SAKAGAMI, Seiki OHARA, Kosho AKATSUKA, Manuel Diaz REYES, Kazutaka ONO, Hiroyuki HIJIYA