Patents by Inventor Katsuya Sakamoto
Katsuya Sakamoto 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: 20240076230Abstract: A method for producing an acid-reactive glass powder, an acid-reactive glass powder obtained by the method, and a dental glass ionomer cement composition comprising the acid-reactive glass powder. The dental glass ionomer cement composition has good mixing property, a sufficient working time, and simultaneously can make the dental glass ionomer cement composition exhibit superior mechanical properties. More specifically, a method for producing an acid-reactive glass powder wherein an acid-reactive glass powder having a range of 2 to 10 ?m of a 50% particle size is obtainable by pulverizing a large-particle-size acid-reactive glass powder having a range of 250 to 3000 ?m of a 50% particle size in a state where a small-particle-size acid-reactive glass powder having a range of 1 to 5 ?m of a 50% particle size coexists.Type: ApplicationFiled: August 28, 2023Publication date: March 7, 2024Applicant: KABUSHIKI KAISHA SHOFUInventors: Shuji SAKAMOTO, Takuma ITAGAKI, Manami NISHIMURA, Katsuya KIMOTO
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Publication number: 20210251104Abstract: This heat radiating device is provided with a heat radiating part for radiating the heat of a heat generating body, and a fan provided on a surface opposite to a surface on which the heat generating body of the heat radiating part is located. The heat radiating part is formed by stacking a plurality of plate-like heat radiating plates, and comb-like fin parts that extend radially in the in-plane direction are formed on the peripheries of the respective heat radiating plates.Type: ApplicationFiled: May 31, 2019Publication date: August 12, 2021Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takashi MITSUNARI, Kenichi NAKANO, Katsuya SAKAMOTO, Youhei MINESAKI, Yoshitada HIGASHIMOTO
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Publication number: 20170005895Abstract: A failure management server stores therein a plurality of failure cases in which the content of failure handling performed in the past in order to handle a failure is associated with the level of a contact person who is in charge of the failure handling. The failure management server stores therein a plurality of pieces of contact person information which are related to each of the contact persons which include level information that indicates the level attached to each of the contact persons. Then, the failure management server acquires, from the level information, the level of the contact person who is in charge of the failure handling that is requested for a search, extracts a failure case on the basis of the acquired level of the contact person, and outputs the extracted failure case as a search result.Type: ApplicationFiled: June 27, 2016Publication date: January 5, 2017Applicant: FUJITSU LIMITEDInventors: Katsuya Sakamoto, Masanori Kimura, KEI OHISHI
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Patent number: 8240119Abstract: A high-strength cable having a twisted layer of non-metallic reinforcing elements in outer coatings is disclosed. The reinforcing elements include coating elements, fiber elements of copolyparaphenylene-3,4?-oxydiphenyleneterephthalic amide disposed in the coating elements, and filling materials filled between the fiber elements, respectively. The lateral compression stress of the fiber elements of the copolyparaphenylene-3,4?-oxydiphenyleneterephthalic amide is 75 cN/dtex or more.Type: GrantFiled: February 18, 2009Date of Patent: August 14, 2012Assignees: Furukawa Electric Co., Ltd., Japan Agency for Marine-Earth Science and TechnologyInventors: Yoshihiro Fujimoto, Katsuya Sakamoto, Tatsushi Fujimori, Hajime Izawa, Hiroyuki Osawa, Takashi Murashima, Kikuo Hashimoto
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Publication number: 20120155241Abstract: An optical pickup apparatus includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.Type: ApplicationFiled: February 28, 2012Publication date: June 21, 2012Applicant: Konika Minolta Opto, Inc.Inventors: Kohei OTA, Nobuyoshi MORI, Junji HASHIMURA, Tohru KIMURA, Kiyono IKENAKA, Katsuya SAKAMOTO, Eiji NOMURA
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Patent number: 7872959Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength ?1, ?2 and ?3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1|>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.Type: GrantFiled: December 2, 2008Date of Patent: January 18, 2011Assignee: Konica CorporationInventors: Tohru Kimura, Katsuya Sakamoto, Yuichi Atarashi
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Publication number: 20100326038Abstract: A high-strength cable is a high-strength cable that has a twisted layer 21 of non-metallic reinforcing elements in outer coatings. Reinforcing elements 41 and 42 have coating elements 50 and 60, fiber elements 51 and 61 of copolyparaphenylene-3,4?-oxydiphenyleneterephthalic amide disposed in the coating elements 50 and 60, and filling materials 52 and 62 filled between the fiber elements, respectively. The lateral compression stress of the fiber elements 51 and 61 of the copolyparaphenylene-3,4?-oxydiphenyleneterephthalic amide is 75 cN/dtex or more.Type: ApplicationFiled: February 18, 2009Publication date: December 30, 2010Applicants: FURUKAWA ELECTRIC CO., LTD., JAPAN AGENCY FOR MARINE-EARTH SCIENCE AND TECH.Inventors: Yoshihiro Fujimoto, Katsuya Sakamoto, Tatsushi Fujimori, Hajime Izawa, Hiroyuki Osawa, Takashi Murashima, Kikuo Hashimoto
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Patent number: 7697392Abstract: An optical pickup apparatus which conducts reproducing and/or recording information for a first optical information recording medium by using a light flux having a wavelength ?1 (350??1 (nm)?480) and a second optical information recording medium. The optical pickup apparatus comprises an output angle conversion element which is a fixedly arranged single lens which can convert an output angle of the first light flux and the second light flux. The optical detector equipped in the optical pickup apparatus can receive both of the first light flux and the second light flux. And, both optical surfaces of the output angle conversion element are refractive surfaces.Type: GrantFiled: July 17, 2006Date of Patent: April 13, 2010Assignee: Konica Minolta Opto, Inc.Inventors: Mika Wachi, Kiyono Ikenaka, Katsuya Sakamoto
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Patent number: 7671312Abstract: The present invention provides an optical pickup system including a first light source emitting a light flux with a first wavelength; a second light source emitting a light flux with a second wavelength; and a light-converging optical system converging the light flux with the first wavelength from the first light source with a first magnification onto a first reference surface set at a first depth, and converging the light flux with the second wavelength from the second light source with a second magnification onto a second reference surface set at a second depth. The first and second wavelengths, the first and second depths, and the first and second magnifications satisfy: a first condition according to an aberration and a second condition according to a working distance.Type: GrantFiled: June 16, 2005Date of Patent: March 2, 2010Assignee: Konica Minolta Opto, Inc.Inventor: Katsuya Sakamoto
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Patent number: 7656774Abstract: An objective lens for at least one of recording and reproducing for an optical information recording medium includes in the order from a light source side: a first lens group having negative refracting power, which is in a meniscus shape having a concave surface facing the light source side; a second lens group having positive refracting power; and a third lens group having positive refracting power, which is in a meniscus shape having a concave surface facing an image side.Type: GrantFiled: March 24, 2005Date of Patent: February 2, 2010Assignee: Konica Minolta Opto, Inc.Inventor: Katsuya Sakamoto
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Patent number: 7639589Abstract: An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied: |?SA1/?U|·|?U|+|?SA2/?T|·|?T|?0.07 ?rms where ? represents a wavelength of a light source, ?SA1/?U represents a change of a spherical aberration for an object-to-image distance change ?U (|?U|?0.5 mm) and ?SA2/?T represents a change of spherical aberration for a temperature change ?T (|?T|?30° C.), the object-to-image distance is a distance between the light source (a light emitting point) and the information recording surface.Type: GrantFiled: December 17, 2007Date of Patent: December 29, 2009Assignee: Konica CorporationInventors: Shinichiro Saito, Katsuya Sakamoto
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Patent number: 7558180Abstract: The present invention has a beam shaping element for converting the light source 11 into a light flux whose emitting angle is almost equal and for projecting it, and a generation amount of the astigmatism generated by the temperature change is suppressed by a linear expansion of the beam shaping element.Type: GrantFiled: August 10, 2004Date of Patent: July 7, 2009Assignee: Konica Minolta Opto, Inc.Inventors: Katsuya Sakamoto, Junji Hashimura
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Publication number: 20090080321Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength ?1, ?2 and ?3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1|>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.Type: ApplicationFiled: December 2, 2008Publication date: March 26, 2009Inventors: Tohru Kimura, Katsuya Sakamoto, Yuichi Atarashi
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Patent number: 7483358Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength ?1, ?2 and ?3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1>|n3 |, and the hybrid objective lens converges a n1-th, n2-th and N3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.Type: GrantFiled: March 20, 2008Date of Patent: January 27, 2009Assignee: Konica CorporationInventors: Tohru Kimura, Katsuya Sakamoto, Yuichi Atarashi
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Patent number: 7463568Abstract: An objective optical element of an optical pickup apparatus has a magnification m1 satisfying the following formula for a light flux of the wavelength ?1:?1/7?m1??1/25 and |m1 |<|M1, where M1 is an optical system magnification from the first light source to the first optical information recording medium for a light flux of the wavelength ?1. The objective optical element comprises a common region and an exclusive region. The exclusive region includes an exclusive diffractive structure having a function to suppress an increase of spherical aberration due to a raise of atmospheric temperature. A light flux of a wavelength ?2. having passed through the exclusive diffractive structure intersects with the optical axis at a position different from the position of the converged light spot formed on the information recording plane of the second optical information recording medium.Type: GrantFiled: March 14, 2007Date of Patent: December 9, 2008Assignee: Konica Minolta Holdings, Inc.Inventors: Mitsuru Mimori, Kohei Ota, Shinichiro Saito, Yuichi Atarashi, Katsuya Sakamoto, Hidekazu Totsuka, Kiyono Ikenaka
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Publication number: 20080259767Abstract: An objective optical element of an optical pickup apparatus has a magnification m1 satisfying the following formula for a light flux of the wavelength ?1: ? 1/7?m1?? 1/25 and |m1|<|M1, where M1 is an optical system magnification from the first light source to the first optical information recording medium for a light flux of the wavelength ?1. The objective optical element comprises a common region and an exclusive region. The exclusive region includes an exclusive diffractive structure having a function to suppress an increase of spherical aberration due to a raise of atmospheric temperature. A light flux of a wavelength ?2 having passed through the exclusive diffractive structure intersects with the optical axis at a position different from the position of the converged light spot formed on the information recording plane of the second optical information recording medium.Type: ApplicationFiled: June 6, 2008Publication date: October 23, 2008Inventors: Mitsuru Mimori, Kohei Ota, Shinichiro Saito, Yuichi Atarashi, Katsuya Sakamoto, Hidekazu Totsuka, Kiyono Ikenaka
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Publication number: 20080192612Abstract: An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied: |?SA1/?U|·|?U|+|?SA2/?T|·|?T|?0.07?rms where ? represents a wavelength of a light source, ?SA1/?U represents a change of a spherical aberration for an object-to-image distance change ?U (|?U|?0.5 mm) and ?SA2/?T represents a change of spherical aberration for a temperature change ?T (|?T|?30° C.), the object-to-image distance is a distance between the light source (a light emitting point) and the information recording surface.Type: ApplicationFiled: December 17, 2007Publication date: August 14, 2008Inventors: Shinichiro Saito, Katsuya Sakamoto
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Publication number: 20080181085Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength ?1, ?2 and ?3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.Type: ApplicationFiled: March 20, 2008Publication date: July 31, 2008Inventors: Tohru Kimura, Katsuya Sakamoto, Yuichi Atarashi
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Patent number: 7382709Abstract: A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount among diffracted rays of each of first, second and third light flux having wavelength ?1, ?2 and ?3 when respective light flux comes to be incident into the diffractive structure respectively, the following formulas are satisfied: |n1|>|n2|, and |n1|>|n3|, and the hybrid objective lens converges a n1-th, n2-th and n3-th order diffracted ray of the first, second and third light flux onto an information recording plane of each of the first, second ant third optical information recording medium respectively so as to form an appropriate wavefront within respective prescribed necessary image side numerical apertures.Type: GrantFiled: February 27, 2007Date of Patent: June 3, 2008Assignee: Konica CorporationInventors: Tohru Kimura, Katsuya Sakamoto, Yuichi Atarashi
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Publication number: 20080074981Abstract: The present invention provides an optical pickup system including a first light source emitting a light flux with a first wavelength; a second light source emitting a light flux with a second wavelength; and a light-converging optical system converging the light flux with the first wavelength from the first light source with a first magnification onto a first reference surface set at a first depth, and converging the light flux with the second wavelength from the second light source with a second magnification onto a second reference surface set at a second depth. The first and second wavelengths, the first and second depths, and the first and second magnifications satisfy: a first condition according to an aberration and a second condition according to a working distance.Type: ApplicationFiled: June 16, 2005Publication date: March 27, 2008Applicant: Konica Minolta Opto IncInventor: Katsuya Sakamoto