Patents by Inventor Masaya Nagai
Masaya Nagai 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: 20230361478Abstract: An isolator based on a waveguide-based artificial dielectric medium is scalable to a range of desired terahertz frequencies, has non-reciprocal transmission and provides low insertion loss and high isolation at various tunable terahertz frequencies, far exceeding the performance of other terahertz isolators, and rivaling that of commercial optical isolators based on the Faraday effect. Because terahertz artificial dielectrics are low loss, inexpensive, and easy to fabricate, this approach offers a promising new route for polarization control of free-space terahertz beams in various instrumentation applications. Artificial dielectrics are man-made media that mimic properties of naturally occurring dielectric media, or even manifest properties that cannot generally occur in nature. A simple and effective strategy implements a polarizing-beam-splitter and a quarter wave plate to form a highly effective isolator.Type: ApplicationFiled: June 14, 2023Publication date: November 9, 2023Inventors: Rajind MENDIS, Masaya NAGAI, Daniel M. MITTLEMAN
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Publication number: 20230288583Abstract: According to one embodiment, the radiation detection panel includes a photo-electric conversion substrate including a plurality of photo-electric conversion sections, a scintillator layer provided on the photo-electric conversion substrate, and a moisture-proof cover. The moisture-proof cover sandwiches the scintillator layer together with the photo-electric conversion substrate and covers the scintillator layer. The moisture-proof cover is formed of glass.Type: ApplicationFiled: May 17, 2023Publication date: September 14, 2023Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Masaya NAGAI, Hiroshi AIDA
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Patent number: 11705639Abstract: An isolator based on a waveguide-based artificial dielectric medium is scalable to a range of desired terahertz frequencies, has non-reciprocal transmission and provides low insertion loss and high isolation at various tunable terahertz frequencies, far exceeding the performance of other terahertz isolators, and rivaling that of commercial optical isolators based on the Faraday effect. This approach offers a promising new route for polarization control of free-space terahertz beams in various instrumentation applications. Artificial dielectrics are man-made media that mimic properties of naturally occurring dielectric media, or even manifest properties that cannot generally occur in nature. A simple and effective strategy implements a polarizing-beam-splitter and a quarter wave plate to form a highly effective isolator. Performance of the device is believed to exceed that of any other experimentally demonstrated method for isolation of back-reflections for terahertz beams.Type: GrantFiled: March 13, 2018Date of Patent: July 18, 2023Assignee: Brown UniversityInventors: Rajind Mendis, Masaya Nagai, Daniel M. Mittleman
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Patent number: 11513240Abstract: A radiation detection module according to an embodiment includes: an array substrate including multiple photoelectric converters; a scintillator provided on the multiple photoelectric converters; a sealing part that has a frame shape, is provided around the scintillator, is bonded to the array substrate and the scintillator, and includes a thermoplastic resin as a major component; and a moisture-resistant part covering the scintillator from above, in which a peripheral edge vicinity is bonded to an outer surface of the sealing part. The shape of the outer surface of the sealing part is a curved surface protruding outward.Type: GrantFiled: April 2, 2021Date of Patent: November 29, 2022Assignee: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Hiroshi Aida, Hiroshi Horiuchi, Masaya Nagai
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Publication number: 20220090251Abstract: Provided is a method for forming a thermal sprayed coating, including a step of spraying a non-oxide ceramic material on a substrate to form a coating by a high velocity oxy-fuel spraying process. An average particle size of the non-oxide ceramic material is 0.1 to 5.0 ?m, and a particle size distribution of the non-oxide ceramic material contains one or more peaks in each of: a particle size range of 0.1 ?m or more and less than 1.0 ?m; and a particle size range of 1.0 ?m or more and less than 10.0 ?m. The non-oxide ceramic material is dispersed in a solvent to prepare slurry 11, and the slurry 11 is fed from the exterior to flame 10 jetted from a thermal spray gun 2 to form a dense thermal sprayed coating structure.Type: ApplicationFiled: July 23, 2019Publication date: March 24, 2022Inventors: Shinya MIKI, Masaya NAGAI
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Patent number: 11193195Abstract: A component for a hot-dip metal plating bath includes a base material and a thermal spray coating disposed to cover a surface of the base material. The base material includes ferritic stainless steel that contains: C: 0.10% to 0.50% by mass; Si: 0.01% to 4.00% by mass; Mn: 0.10% by mass to 3.00% by mass; Cr: 15.0% to 30.0% by mass; a total of Nb, V, Ti, and Ta: 0.9% by mass to 5.0% by mass; and a balance of Fe and unavoidable impurities. The ferritic stainless steel includes a microstructure that includes a ferrite phase as a main phase and a crystallized carbide, an area fraction of a Nb carbide, a Ti carbide, a V carbide, a Ta carbide, and a composite carbide thereof to the crystallized carbide of 30% or more. The hot-dip metal plating bath contains 50% by mass or more of Al.Type: GrantFiled: May 17, 2018Date of Patent: December 7, 2021Assignees: TOCALO CO., LTD., DAIDO STEEL CO., LTD., DAIDO CASTINGS CO., LTD.Inventors: Junichi Takeuchi, Masaya Nagai, Shinichi Kubo, Masashi Nagaya, Yoshinori Sumi, Yoshihiko Koyanagi, Hiroyuki Takabayashi, Yasuhiro Takenaka
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Publication number: 20210247529Abstract: A radiation detection module according to an embodiment includes: an array substrate including multiple photoelectric converters; a scintillator provided on the multiple photoelectric converters; a sealing part that has a frame shape, is provided around the scintillator, is bonded to the array substrate and the scintillator, and includes a thermoplastic resin as a major component; and a moisture-resistant part covering the scintillator from above, in which a peripheral edge vicinity is bonded to an outer surface of the sealing part. The shape of the outer surface of the sealing part is a curved surface protruding outward.Type: ApplicationFiled: April 2, 2021Publication date: August 12, 2021Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Hiroshi AIDA, Hiroshi HORIUCHI, Masaya NAGAI
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Patent number: 11054662Abstract: A polarizing beam splitter includes thin electrically conductive metal sheets each having an edge and a thickness substantially less than the wavelength ? of a terahertz signal. The sheets are arranged in a stack or array to define wave propagation passages for energy of a terahertz beam directed at a face formed by edges of the sheets, and constitutes an artificial dielectric which operates below cutoff to allow selective transmission through the passages and/or reflection from said face, separating polarization states of the beam with defined power splitting. The artificial dielectric beam splitter can be configured to operate over a broad terahertz band. The sheets are flat, without micropatterned surface features, are robust and simple to manufacture, and form a broad band polarizing beam slitter for terahertz radiation. Complete separation of the transmitted and reflected beam is achieved below cutoff by rotating the polarization of the input beam.Type: GrantFiled: December 11, 2017Date of Patent: July 6, 2021Assignees: Brown University, Osaka UniversityInventors: Rajind Mendis, Masaya Nagai, Daniel M. Mittleman
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Publication number: 20210184363Abstract: An isolator based on a waveguide-based artificial dielectric medium is scalable to a range of desired terahertz frequencies, has non-reciprocal transmission and provides low insertion loss and high isolation at various tunable terahertz frequencies, far exceeding the performance of other terahertz isolators, and rivaling that of commercial optical isolators based on the Faraday effect. This approach offers a promising new route for polarization control of free-space terahertz beams in various instrumentation applications. Artificial dielectrics are man-made media that mimic properties of naturally occurring dielectric media, or even manifest properties that cannot generally occur in nature. A simple and effective strategy implements a polarizing-beam-splitter and a quarter wave plate to form a highly effective isolator. Performance of the device is believed to exceed that of any other experimentally demonstrated method for isolation of back-reflections for terahertz beams.Type: ApplicationFiled: March 13, 2018Publication date: June 17, 2021Inventors: Rajind MENDIS, Masaya NAGAI, Daniel M. MITTLEMAN
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Publication number: 20200087770Abstract: A component for a hot-dip metal plating bath includes a base material and a thermal spray coating disposed to cover a surface of the base material. The base material includes ferritic stainless steel that contains: C: 0.10% to 0.50% by mass; Si: 0.01% to 4.00% by mass; Mn: 0.10% by mass to 3.00% by mass; Cr: 15.0% to 30.0% by mass; a total of Nb, V, Ti, and Ta: 0.9% by mass to 5.0% by mass; and a balance of Fe and unavoidable impurities. The ferritic stainless steel includes a microstructure that includes a ferrite phase as a main phase and a crystallized carbide, an area fraction of a Nb carbide, a Ti carbide, a V carbide, a Ta carbide, and a composite carbide thereof to the crystallized carbide of 30% or more. The component contains 50% by mass or more of Al.Type: ApplicationFiled: May 17, 2018Publication date: March 19, 2020Applicants: TOCALO CO., LTD., DAIDO STEEL CO., LTD., DAIDO CASTINGS CO., LTD.Inventors: Junichi TAKEUCHI, Masaya NAGAI, Shinichi KUBO, Masashi NAGAYA, Yoshinori SUMI, Yoshihiko KOYANAGI, Hiroyuki TAKABAYASHI, Yasuhiro TAKENAKA
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Publication number: 20200064645Abstract: A polarizing beam splitter includes thin electrically conductive metal sheets each having an edge and a thickness substantially less than the wavelength ? of a terahertz signal. The sheets are arranged in a stack or array to define wave propagation passages for energy of a terahertz beam directed at a face formed by edges of the sheets, and constitutes an artificial dielectric which operates below cutoff to allow selective transmission through the passages and/or reflection from said face, separating polarization states of the beam with defined power splitting. The artificial dielectric beam splitter can be configured to operate over a broad terahertz band. The sheets are flat, without micropatterned surface features, are robust and simple to manufacture, and form a broad band polarizing beam slitter for terahertz radiation. Complete separation of the transmitted and reflected beam is achieved below cutoff by rotating the polarization of the input beam.Type: ApplicationFiled: December 11, 2017Publication date: February 27, 2020Inventors: Rajind MENDIS, Masaya NAGAI, Daniel M. MITTLEMAN
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Publication number: 20190185982Abstract: An insulated bearing includes an outer ring, an inner ring, and a plurality of rolling elements. At least one of the outer ring and an inner ring is made of metal, the plurality of rolling elements are provided between the outer ring and the inner ring, so as to be freely rolled, and at least one of the outer ring and an inner ring is coated with an insulating layer. The insulating layer is formed of a mixture in which silicon carbide and/or aluminum nitride as an additive are/is dispersed in aluminum oxide as a base matrix. The content of the additive is 1 to 40 mass % with respect to the total amount of the mixture.Type: ApplicationFiled: February 26, 2019Publication date: June 20, 2019Applicants: NSK LTD., TOCALO CO., LTDInventors: Junichi TAKEUCHI, Yuji OKADA, Masaya NAGAI, Manabu YAMADA, Naozumi NAKATA
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Patent number: 10260562Abstract: An insulated bearing includes an outer ring, an inner ring, and a plurality of rolling elements. At least one of the outer ring and an inner ring is made of metal, the plurality of rolling elements are provided between the outer ring and the inner ring, so as to be freely rolled, and at least one of the outer ring and an inner ring is coated with an insulating layer. The insulating layer is formed of a mixture in which silicon carbide and/or aluminum nitride as an additive are/is dispersed in aluminum oxide as a base matrix. The content of the additive is 1 to 40 mass % with respect to the total amount of the mixture.Type: GrantFiled: December 24, 2015Date of Patent: April 16, 2019Assignees: TOCALO CO., LTD, NSK LTD.Inventors: Junichi Takeuchi, Yuji Okada, Masaya Nagai, Manabu Yamada, Naozumi Nakata
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Publication number: 20170356075Abstract: An insulated bearing includes an outer ring, an inner ring, and a plurality of rolling elements. At least one of the outer ring and an inner ring is made of metal, the plurality of rolling elements are provided between the outer ring and the inner ring, so as to be freely rolled, and at least one of the outer ring and an inner ring is coated with an insulating layer. The insulating layer is formed of a mixture in which silicon carbide and/or aluminum nitride as an additive are/is dispersed in aluminum oxide as a base matrix. The content of the additive is 1 to 40 mass % with respect to the total amount of the mixture.Type: ApplicationFiled: December 24, 2015Publication date: December 14, 2017Applicants: TOCALO CO., LTD, NSK LTD.Inventors: Junichi TAKEUCHI, Yuji OKADA, Masaya NAGAI, Manabu YAMADA, Naozumi NAKATA
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Publication number: 20170233860Abstract: A manufacturing method for a component in a plasma processing apparatus is provided. The method includes: performing a surface conditioning on a surface of an underlying layer on which a film is to be formed by thermal spraying, the surface of the underlying layer includes a surface of a base or a surface of a layer formed on the surface of the base; and forming the film on the surface of the underlying layer by thermally spraying yttrium fluoride. A high velocity oxygen fuel spraying method or an atmospheric plasma spraying method is used in the forming of the film.Type: ApplicationFiled: May 4, 2017Publication date: August 17, 2017Inventors: Nobuyuki Nagayama, Koji Mitsuhashi, Shikou Abukawa, Masaya Nagai, Yoshinori Kanazawa, Tetsuya Niya
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Publication number: 20160076129Abstract: Particle generation can be suppressed from a thermally sprayed film of yttrium fluoride. A component exposed to plasma in a plasma processing apparatus is provided. The component includes a base and a film. The base is made of aluminum or an aluminum alloy, and an alumite film may be formed on a surface of the base. The film is formed by thermally spraying yttrium fluoride on a surface of the base or on a surface of an underlying layer including a layer provided on the base. A porosity of the film is 4% or less, and an arithmetic mean roughness of a surface of the film is 4.5 ?m or less.Type: ApplicationFiled: September 15, 2015Publication date: March 17, 2016Inventors: Nobuyuki Nagayama, Koji Mitsuhashi, Shikou Abukawa, Masaya Nagai, Yoshinori Kanazawa, Tetsuya Niya
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Publication number: 20150205079Abstract: A terahertz band wavelength plate includes: a first metallic plate; and a second metallic plate which is disposed opposite the first metallic plate, wherein at least one of the first and second metallic plates has a periodic dielectric constant distribution in which a plasmon is excited.Type: ApplicationFiled: January 15, 2015Publication date: July 23, 2015Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Jun TAKAYANAGI, Masaya NAGAI
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Patent number: 8497490Abstract: A terahertz wave generation device is provided with an ultra-short pulse laser light source (3) for generating ultra-short pulse laser light at a single repeating frequency and optical fibers (F1 to F5) for respective transmitting and projecting of the ultra-short pulse laser light to an LN crystal (15). Projection units (13) of the optical fibers (F1 to F5) are made parallel to irradiate the ultra-short pulse laser light (L) projected from the projection units (13), respectively, on terahertz transmission line (A) in the LN crystal (15) with sequential delays. The optical lengths of the transmission paths of the optical fibers (F1 to F5) are set longer as the transmission paths go closer to one side of the parallel direction of the projection units (13).Type: GrantFiled: August 24, 2009Date of Patent: July 30, 2013Assignee: Aisin Seiki Kabushiki KaishaInventors: Hideyuki Ohtake, Yuzuru Uehara, Koichiro Tanaka, Masaya Nagai
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Publication number: 20110147621Abstract: A terahertz wave generation device is provided with an ultra-short pulse laser light source (3) for generating ultra-short pulse laser light at a single repeating frequency and optical fibers (F1 to F5) for respective transmitting and projecting of the ultra-short pulse laser light to an LN crystal (15). Projection units (13) of the optical fibers (F1 to F5) are made parallel to irradiate the ultra-short pulse laser light (L) projected from the projection units (13), respectively, on terahertz transmission line (A) in the LN crystal (15) with sequential delays. The optical lengths of the transmission paths of the optical fibers (F1 to F5) are set longer as the transmission paths go closer to one side of the parallel direction of the projection units (13).Type: ApplicationFiled: August 24, 2009Publication date: June 23, 2011Applicant: Aisin Seiki Kabushiki KaishaInventors: Hideyuki Ohtake, Yuzuru Uehara, Koichiro Tanaka, Masaya Nagai
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Publication number: 20100054296Abstract: A terahertz wave generating apparatus includes an excitation light source for outputting an excitation light at a predetermined wavelength, an optical crystal being excited by an irradiation with the excitation light in order to generate a terahertz wave and terahertz wave amplifying means for repeatedly performing an optical parametric amplification for the terahertz wave by use of the excitation light, wherein the terahertz wave amplifying means includes an optical waveguide having the optical crystal serving as a core and a medium serving as a clad whose refractive index is smaller than a refractive index of the optical crystal, and the inputted excitation light is propagated within the optical waveguide with fulfilling a condition for a total reflection.Type: ApplicationFiled: August 24, 2009Publication date: March 4, 2010Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Hideyuki OHTAKE, Yuki Ichikawa, Yuzuru Uehara, Koichiro Tanaka, Masaya Nagai