Patents by Inventor Seiji Yuasa
Seiji Yuasa 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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Patent number: 11358311Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.Type: GrantFiled: May 31, 2019Date of Patent: June 14, 2022Assignee: OTSUKA PHARMACEUTICAL CO., LTDInventors: Takehiko Goshima, Yoshihiro Okumura, Hiroshi Umetsu, Seiji Yuasa
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Patent number: 11156552Abstract: A prism (1090) is configured from a dielectric medium and is used in analysis using surface plasmons. The prism (1090) is provided with an incidence surface (1170) on which excitation light from outside is incident, a reflection surface (1172) on which excitation light having entered the incidence surface (1170) is reflected, an emission surface (1174) from which excitation light reflected by the reflection surface (1172) is emitted, and an opposing surface (1175) opposing the reflection surface (1172). A gold film (1092) is formed on the reflection surface (1172). The opposing surface (1175) has a sink-mark surface (1200), and the sink-mark surface (1200) is a transparent surface.Type: GrantFiled: September 7, 2015Date of Patent: October 26, 2021Assignee: Konica Minolta, Inc.Inventors: Yoshihiro Okumura, Takehiko Goshima, Seiji Yuasa
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Publication number: 20190283290Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.Type: ApplicationFiled: May 31, 2019Publication date: September 19, 2019Inventors: Takehiko Goshima, Yoshihiro Okumura, Hiroshi Umetsu, Seiji Yuasa
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Patent number: 10369728Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.Type: GrantFiled: January 15, 2014Date of Patent: August 6, 2019Assignee: KONICA MINOLTA, INC.Inventors: Takehiko Goshima, Yoshihiro Okumura, Hiroshi Umetsu, Seiji Yuasa
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Publication number: 20170276604Abstract: A prism (1090) is configured from a dielectric medium and is used in analysis using surface plasmons. The prism (1090) is provided with an incidence surface (1170) on which excitation light from outside is incident, a reflection surface (1172) on which excitation light having entered the incidence surface (1170) is reflected, an emission surface (1174) from which excitation light reflected by the reflection surface (1172) is emitted, and an opposing surface (1175) opposing the reflection surface (1172). A gold film (1092) is formed on the reflection surface (1172). The opposing surface (1175) has a sink-mark surface (1200), and the sink-mark surface (1200) is a transparent surface.Type: ApplicationFiled: September 7, 2015Publication date: September 28, 2017Inventors: Yoshihiro OKUMURA, Takehiko GOSHIMA, Seiji YUASA
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Publication number: 20160039130Abstract: To provide a method for manufacturing an optical element, which improves the surface precision of the optical surface as well as reducing the birefringence at a low cost. A method for manufacturing an optical element 1090A having optical surfaces 1091 and 1092 and a non-optical surface 1093A that is adjacent to the optical surface 1092 via a ridge by injection molding includes forming the non-optical surface 1093A with a mold surface. The mold surface includes a sink forming area 1095 as a first area having a first surface roughness, and a high transfer area 1094 as a second area having a second surface roughness different from the first surface roughness. The second area is located outside the first area.Type: ApplicationFiled: January 15, 2014Publication date: February 11, 2016Inventors: Takehiko GOSHIMA, Yoshihiro OKAMURA, Hiroshi UMETSU, Seiji YUASA
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Publication number: 20140116089Abstract: Provided is an apparatus for manufacturing an optical element, and a method of manufacturing an optical element, whereby variance of dropping positions of glass droplets can be suppressed even with a low-cost and simple configuration. The positions where the glass droplets are discharged from a discharged port 51c are controlled by having a predetermined force applied to the glass droplets from the wall surface of a passage 51b of a correcting member 51 in a non-contact manner, the glass droplets passing through the passage 51b. Therefore, variance of dropping positions of the glass droplets can be suppressed without surrounding the whole manufacturing apparatus. Consequently, a highly accurate optical element can be manufactured with the low-cost and simple configuration.Type: ApplicationFiled: June 6, 2012Publication date: May 1, 2014Inventors: Seiji Yuasa, Shuhei Ashida, Hiroshi Nagoya
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Patent number: 7488170Abstract: A molding die for forming an optical element, comprises a base body; a film layer formed on the base body and having a thickness of 0.01 to 500 ?m; and a transferring surface formed on a surface of the film layer by a predetermined process and having a surface roughness Ra of 0.1 to 50 nm. The film layer is formed by an amorphous alloy having a supercooled liquid state containing 20 mol % or more of at least one atom of Pt, Ir, Au, Pd, Ru, Rh, Fe, Co, Ni, Zr, Al, Ti, Cu, W, Mo, Cr, B, and P and the transferring surface maintains the surface roughness after the transferring surface is heated to a temperature which is higher 50° C. higher than the glass transition temperature (Tg) of the optical element formed by the transferring surface and lower than the glass transition temperature of the amorphous alloy.Type: GrantFiled: April 4, 2005Date of Patent: February 10, 2009Assignee: Konica Minolta Opto, Inc.Inventors: Seiji Yuasa, Shigeru Hosoe, Yuichi Atarashi
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Patent number: 7366395Abstract: The invention relates to a manufacturing method of a die for molding an optical element. The manufacturing method comprising: forming the first film layer of an amorphous alloy having a super-cooling liquid phase onto a master transfer surface of a master die for molding a molding transfer surface of the die; heating the first film layer more than a glass transition point of the amorphous alloy having the super-cooling liquid phase while a surface of the first film layer and a transferred surface of a base material of the die being faced and pressed; and peeling the first film layer from the master die and transferring the first film layer onto the base material of the die to form the molding transfer surface of the die.Type: GrantFiled: March 28, 2005Date of Patent: April 29, 2008Assignee: Konica Minolta Opto, Inc.Inventors: Seiji Yuasa, Shigeru Hosoe
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Publication number: 20050242454Abstract: The invention relates to a manufacturing method of a die for molding an optical element. The manufacturing method comprising: forming the first film layer of an amorphous allow having a super-cooling liquid phase onto a master transfer surface of a master die for molding a molding transfer surface of the die; heating the first film layer more than a glass transition point of the amorphous alloy having the super-cooling liquid phase while a surface of the first film layer and a transferred surface of a base material of the die being faced and pressed; and peeling the first film layer from the master die and transferring the first film layer onto the base material of the die to form the molding transfer surface of the die.Type: ApplicationFiled: March 28, 2005Publication date: November 3, 2005Inventors: Seiji Yuasa, Shigeru Hosoe
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Publication number: 20050226955Abstract: A molding die for forming an optical element, comprises a base body; a film layer formed on the base body and having a thickness of 0.01 to 500 ?m; and a transferring surface formed on a surface of the film layer by a predetermined process and having a surface roughness Ra of 0.1 to 50 nm. The film layer is formed by an amorphous alloy having a supercooled liquid state containing 20 mol % or more of at least one atom of Pt, Ir, Au, Pd, Ru, Rh, Fe, Co, Ni, Zr, Al, Ti, Cu, W, Mo, Cr, B, and P and the transferring surface maintains the surface roughness after the transferring surface is heated to a temperature which is higher 50° C. higher than the glass transition temperature (Tg) of the optical element formed by the transferring surface and lower than the glass transition temperature of the amorphous alloy.Type: ApplicationFiled: April 4, 2005Publication date: October 13, 2005Inventors: Seiji Yuasa, Shigeru Hosoe, Yuichi Atarashi