Patents by Inventor Kazuhiko Adachi
Kazuhiko Adachi 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: 11803057Abstract: An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.Type: GrantFiled: March 6, 2020Date of Patent: October 31, 2023Assignee: RICOH COMPANY, LTD.Inventors: Suguru Sangu, Tatsuya Shimokawa, Kazuhiko Adachi, Shu Tanaka, Shuichi Suzuki
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Patent number: 11268177Abstract: An austenitic stainless steel according to the present invention has a chemical composition containing, by mass %: C: 0.01 to 0.15%; Si: 2.0% or less; Mn: 3.0% or less; Cr: 10.0 to 20.0%; Ni: 5.0 to 13.0%; N: 0.01 to 0.30%; Nb: 0 to 0.5%; Ti: 0 to 0.5%; and V: 0 to 0.5%, with the balance: Fe and impurities, wherein an average grain size is 10.0 ?m or less, a difference in value of an average lattice constant dAve. (={d?(111)×I?(111)+d?(200)×I?(200)+d?(220)×I?(220)+d?(311)×I?(311)}/{I?(111)+I?(200)+I?(220)+I?(311)}) of an austenite phase between a surface portion and a center portion is 0.010 ? or more, and a value of a diffraction peak integrated intensity ratio r (=100×?I?/?IALL) at a surface is 95% or more.Type: GrantFiled: September 27, 2016Date of Patent: March 8, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Kazuhiko Adachi, Akihiro Nishimura, Shinichi Teraoka, Hideki Fujii
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Publication number: 20200285058Abstract: An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.Type: ApplicationFiled: March 6, 2020Publication date: September 10, 2020Inventors: Suguru SANGU, Tatsuya Shimokawa, Kazuhiko Adachi, Shu Tanaka, Shuichi Suzuki
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Publication number: 20200174249Abstract: A light deflection device includes a substrate including a planar portion and a recess; a spacer member disposed at a bottom of the recess; a supporting section disposed on the spacer member; a movable part rotatably supported by the supporting section and having a reflecting surface configured to reflect light at a height equal to or higher than a height of the planar portion; and a light transmissive member disposed on the planar portion and covering the movable part.Type: ApplicationFiled: October 2, 2019Publication date: June 4, 2020Applicant: Ricoh Company, Ltd.Inventor: KAZUHIKO ADACHI
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Patent number: 10268163Abstract: An atomic oscillator includes a plurality of components, the components including a light source that emits excitation light, a gas cell in which an atom to be excited by the excitation light is sealed, and a photodetector that detects the excitation light transmitting through the gas cell; and a main part, wherein a part of the plurality of components are laminated in the main part. In a first component and a second component adjacent to each other of the main part, an electrically conductive film is formed on each of side surfaces of the first component and the second component; bonding patterns that are extended from the respective electrically conductive films and that face each other are formed on respective bonding surfaces facing each other of the first component and the second component; and the bonding patterns that face each other are bonded by a bonding material.Type: GrantFiled: October 13, 2017Date of Patent: April 23, 2019Assignee: Ricoh Company, Ltd.Inventor: Kazuhiko Adachi
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Patent number: 10177530Abstract: An optical sensor, an optical examination device, and a method of detecting optical properties. The optical sensor includes an irradiation system including light irradiator to irradiate a test object with light, and a detection system to detect the light that is emitted from the irradiation system to the test object and has propagated through the test object. The light irradiator includes a multilayered structure having an active layer, and the multilayered structure includes a surface-emitting laser element and a photo-sensing element optically connected to the surface-emitting laser element. The optical examination device includes the optical sensor, and a controller to calculate optical properties of the test object based on a detection result of the optical sensor. The method includes performing optical simulation to obtain a detection light quantity distribution for an optical model and performing inverse problem estimation.Type: GrantFiled: December 15, 2016Date of Patent: January 8, 2019Assignee: RICOH COMPANY, LTD.Inventors: Toshihiro Ishii, Yoichiro Takahashi, Sunao Chubachi, Masayuki Fujiwara, Toshihide Sasaki, Kazuhiko Adachi
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Publication number: 20180274055Abstract: An austenitic stainless steel sheet consists, (mass %), of: C: 0.03 to 0.15%; Si: 0.20 to 2.5%; Mn: 0.2 to 4.5%; P: 0.010 to 0.030%; S: 0.0001 to 0.0010%; Cr: 20.0 to 26.0%; Ni: 10.0 to 15.0%; Cu: 0.01 to 2.0%; Mo: 0.01 to 2.0%; Co: 0.05 to 2.50%; Al: 0.01 to 0.20%; N: 0.1 to 0.6%; V: 0.02 to 0.15%; B: 0.0002 to 0.0050%; Nb: 0 to 0.10%; Ti: 0 to 0.10%; Y: 0 to 0.10%; Ca: 0 to 0.010%; Mg: 0 to 0.010%; and REM: 0 to 0.10%, balance Fe and impurities. Contents of [Mn] and [S] satisfy [Mn]×[S]?0.0020. Sheet thickness is 0.5 mm or smaller, an aspect ratio value L1/L2 satisfies L1/L2?1.5 where L1 and L2 denote major and minor axis lengths of a crystal grain. A surface hardness (HV) is 300 or higher after retention at 600° C. for 400 hours.Type: ApplicationFiled: October 5, 2016Publication date: September 27, 2018Inventors: Shinichi TERAOKA, Kazuhiko ADACHI, Yuichi FUKUMURA
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Publication number: 20180265954Abstract: An austenitic stainless steel according to the present invention has a chemical composition containing, by mass %: C: 0.01 to 0.15%; Si: 2.0% or less; Mn: 3.0% or less; Cr: 10.0 to 20.0%; Ni: 5.0 to 13.0%; N: 0.01 to 0.30%; Nb: 0 to 0.5%; Ti: 0 to 0.5%; and V: 0 to 0.5%, with the balance: Fe and impurities, wherein an average grain size is 10.0 ?m or less, a difference in value of an average lattice constant dAve. (={d?(111)×I?(111)+d?(200)×I?(200)+d?(220)×I?(220)+d?(311)×I?(311)}/{I?(111)+I?(200)+I?(220)+I?(311}) of an austenite phase between a surface portion and a center portion is 0.010 ? or more, and a value of a diffraction peak integrated intensity ratio r (=100×?I?/?IALL) at a surface is 95% or more.Type: ApplicationFiled: September 27, 2016Publication date: September 20, 2018Inventors: Kazuhiko ADACHI, Akihiro NISHIMURA, Shinichi TERAOKA, Hideki FUJII
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Patent number: 9966730Abstract: A surface-emitting laser apparatus includes a surface-emitting laser substrate; a microlens substrate; and an adhesion agent. The surface-emitting laser substrate includes a semiconductor substrate; and a surface-emitting laser and plural first adhesion fixing regions formed on a first face of the semiconductor substrate. The microlens substrate includes a microlens configured to receive light emitted by the surface-emitting laser; plural pier portions protruding toward a side of the first face of the semiconductor substrate; and plural second adhesion fixing regions, formed at positions corresponding to the first adhesion fixing regions on surfaces of the pier portions. The adhesive agent causes the first adhesion fixing regions and the second adhesion fixing regions to adhere to each other. A restoring force acts on the adhesive agent in a case where the adhesive agent is melted.Type: GrantFiled: July 27, 2015Date of Patent: May 8, 2018Assignee: RICOH COMPANY, LTD.Inventors: Kazuhiko Adachi, Naoto Jikutani
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Publication number: 20180107167Abstract: An atomic oscillator includes a plurality of components, the components including a light source that emits excitation light, a gas cell in which an atom to be excited by the excitation light is sealed, and a photodetector that detects the excitation light transmitting through the gas cell; and a main part, wherein a part of the plurality of components are laminated in the main part. In a first component and a second component adjacent to each other of the main part, an electrically conductive film is formed on each of side surfaces of the first component and the second component; bonding patterns that are extended from the respective electrically conductive films and that face each other are formed on respective bonding surfaces facing each other of the first component and the second component; and the bonding patterns that face each other are bonded by a bonding material.Type: ApplicationFiled: October 13, 2017Publication date: April 19, 2018Applicant: Ricoh Company, Ltd.Inventor: Kazuhiko ADACHI
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Publication number: 20180034070Abstract: A stainless steel sheet used for a separator of a polymer electrolyte fuel cell, wherein the steel sheet has a volume ratio of M2B boride-based metal precipitates of 8% or higher and a volumetric-basis particle-size frequency distribution of M2B boride-based metal precipitates having sphere-equivalent diameters of 6.72 ?m or less of 99.5% or higher, in a surface layer which has a depth of 0.2 t from at least one of surfaces (t is an overall thickness of the steel sheet), and the steel sheet has an apparent density of 0.995 or higher, assuming a real density to be 1. A polymer electrolyte fuel cell in which the stainless steel sheet is used for a separator is given an excellent cell performance without high-cost surface treatment such as expensive gold plating for the reduction of the contact resistance of a surface.Type: ApplicationFiled: February 24, 2016Publication date: February 1, 2018Inventors: Yoshio TARUTANI, Ryuji HAMADA, Takeo YAZAWA, Akira SEKI, Kazuhiko ADACHI, Junko IMAMURA
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Patent number: 9859681Abstract: An optical device includes a semiconductor element configured to emit emission light or to receive incident light, including a first fitting part including a portion having a convex shape in a first region; an optical member arranged on an optical path of the emission light emitted from the semiconductor element or the incident light entering the semiconductor element, including a second fitting part fitted to at least a part of the portion having the convex shape, the first region being opposed to the optical member; and a joint part that joins the semiconductor element and the optical member, arranged between the first fitting part and the second fitting part.Type: GrantFiled: April 21, 2016Date of Patent: January 2, 2018Assignee: RICOH COMPANY, LTD.Inventors: Kazuhiko Adachi, Naoto Jikutani
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Patent number: 9831633Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.Type: GrantFiled: January 20, 2016Date of Patent: November 28, 2017Assignee: RICOH COMPANY, LTD.Inventors: Toshihiro Ishii, Satoru Sugawara, Yoshihiro Ohba, Kazuhiro Harasaka, Shunichi Sato, Kazuhiko Adachi
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Publication number: 20170179682Abstract: An optical sensor, an optical examination device, and a method of detecting optical properties. The optical sensor includes an irradiation system including light irradiator to irradiate a test object with light, and a detection system to detect the light that is emitted from the irradiation system to the test object and has propagated through the test object. The light irradiator includes a multilayered structure having an active layer, and the multilayered structure includes a surface-emitting laser element and a photo-sensing element optically connected to the surface-emitting laser element. The optical examination device includes the optical sensor, and a controller to calculate optical properties of the test object based on a detection result of the optical sensor. The method includes performing optical simulation to obtain a detection light quantity distribution for an optical model and performing inverse problem estimation.Type: ApplicationFiled: December 15, 2016Publication date: June 22, 2017Applicant: RICOH COMPANY, LTD.Inventors: Toshihiro ISHII, Yoichiro TAKAHASHI, Sunao CHUBACHI, Masayuki FUJIWARA, Toshihide SASAKI, Kazuhiko ADACHI
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Patent number: 9631249Abstract: Martensitic mixed phase stainless steel, which has in well balance between excellent strength and formability and excellent fatigue properties, and is inexpensive, and suitable for spring members, has: a chemical composition comprising C: 0.1-0.4%, Si: at most 2.0%, Mn: 0.1-6.0%, Cr: 10.0-28.0%, N: at most 0.17%, the remainder of Fe and impurities, and a metallurgical structure which includes a ferrite phase and a martensitic phase, and also a retained austenite phase of 5 volume % or less if necessary, and which satisfies a relationship of CM/CF?5.0 where an average value CF of C content existing in the ferrite phase, and an average value CM of C content existing in the martensite.Type: GrantFiled: October 22, 2012Date of Patent: April 25, 2017Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko Adachi, Takashi Maeda, Masayuki Shibuya, Kazuyoshi Fujisawa, Yuuichi Fukumura
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Publication number: 20160336716Abstract: An optical device includes a semiconductor element configured to emit emission light or to receive incident light, including a first fitting part including a portion having a convex shape in a first region; an optical member arranged on an optical path of the emission light emitted from the semiconductor element or the incident light entering the semiconductor element, including a second fitting part fitted to at least a part of the portion having the convex shape, the first region being opposed to the optical member; and a joint part that joins the semiconductor element and the optical member, arranged between the first fitting part and the second fitting part.Type: ApplicationFiled: April 21, 2016Publication date: November 17, 2016Applicant: Ricoh Company, Ltd.Inventors: Kazuhiko ADACHI, Naoto JIKUTANI
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Publication number: 20160329903Abstract: An atomic oscillator includes a gas cell and a plurality of components. The plurality of components includes a temperature control device for the gas cell; an excitation light source that emits excitation light to excite atoms enclosed in the gas cell; a temperature control device for the excitation light source; and a light receiving element that detects the excitation light that passes through the gas cell. The plurality of components is mounted on an insulating film having wiring.Type: ApplicationFiled: January 26, 2015Publication date: November 10, 2016Applicant: RICOH COMPANY, LTDInventors: Kazuhiko ADACHI, Kazuhiro HARASAKA, Akihiro ITOH
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Patent number: 9429513Abstract: A sensor apparatus includes an irradiation system with a light source configured to emit linearly polarized light of a first polarization direction onto a sheet-like object, in a direction oblique to a direction orthogonal to a surface of the object, a first photodetector arranged on an optical path of light that is emitted from the irradiation system and then is reflected at the object by regular reflection, a first optical element, arranged on an optical path of light reflected by diffuse reflection from an incidence plane of the object, configured to transmit linearly polarized light of a second polarization direction that is orthogonal to the first polarization direction, a second photodetector configured to receive light that has passed through the first optical element, and a detection unit configured to detect at least one of basis weight and thickness of the object.Type: GrantFiled: August 7, 2014Date of Patent: August 30, 2016Assignee: RICOH COMPANY, LTD.Inventors: Kazuhiko Adachi, Yoshihiro Oba, Toshihiro Ishii, Fumikazu Hoshi, Sunao Chubachi, Yoshihiro Misaka
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Publication number: 20160149375Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.Type: ApplicationFiled: January 20, 2016Publication date: May 26, 2016Applicant: RICOH COMPANY, LTD.Inventors: Toshihiro ISHll, Satoru SUGAWARA, Yoshihiro OHBA, Kazuhiro HARASAKA, Shunichi SATO, Kazuhiko ADACHI
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Patent number: 9276377Abstract: A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.Type: GrantFiled: October 8, 2014Date of Patent: March 1, 2016Assignee: RICOH COMPANY, LTD.Inventors: Toshihiro Ishii, Satoru Sugawara, Yoshihiro Ohba, Kazuhiro Harasaka, Shunichi Sato, Kazuhiko Adachi