Patents by Inventor Yutaka Yamaguchi
Yutaka Yamaguchi 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).
-
Patent number: 11969974Abstract: The present invention addresses the problem of providing a surface protection film for a flexible display with which films are not adhered to each other. As a solution, provided is the surface protection film for a flexible display that has a protection layer made of polyurethane as an outermost surface thereof, the polyurethane having a tan ? peak temperature of 20° C. or more.Type: GrantFiled: November 29, 2019Date of Patent: April 30, 2024Assignee: BANDO CHEMICAL INDUSTRIES, LTD.Inventors: Yutaka Kamada, Masahiro Yamaguchi
-
Patent number: 11955777Abstract: An optical combiner includes: a plurality of first input optical fibers that each include a core; a bridge fiber that includes a bridge input surface connected to the cores of the plurality of first input optical fibers, a diameter reduction portion having a diameter that decreases away from the bridge input surface along an optical axis of the optical combiner, and a bridge output surface located opposite to the bridge input surface along the optical axis; an intermediate optical fiber that includes a core connected to the bridge output surface of the bridge fiber; a second input optical fiber that includes a core; and an output optical fiber that includes a first optical waveguide connected to the core of the intermediate optical fiber, and a second optical waveguide connected to the core of the second input optical fiber.Type: GrantFiled: September 24, 2020Date of Patent: April 9, 2024Assignee: Fujikura Ltd.Inventors: Tomoyuki Fujita, Ryokichi Matsumoto, Yutaka Yamaguchi, Takuya Kobayashi, Kiwamu Suzuki
-
Patent number: 11945882Abstract: Crystals of the compound represented by formula (1), a method for the production thereof, and a method for producing an antibody-drug conjugate using the crystals.Type: GrantFiled: August 30, 2018Date of Patent: April 2, 2024Assignee: DAIICHI SANKYO COMPANY, LIMITEDInventors: Tatsuya Yamaguchi, Takashi Kouko, Shigeru Noguchi, Yohei Yamane, Fumikatsu Kondo, Takahiro Aoki, Tadahiro Takeda, Kohei Sakanishi, Hitoshi Sato, Tsuyoshi Ueda, Shinji Matuura, Kei Kurahashi, Yutaka Kitagawa, Tatsuya Nakamura
-
Patent number: 11609380Abstract: A laser device includes: a laser unit that outputs laser light; an output end that launches the laser light; a first fusion splice portion; and a second fusion splice portion. In each of the first fusion splice portion and the second fusion splice portion, two multi-mode fibers are fusion-spliced. Each of the two multi-mode fibers include a core through which the laser light propagates and a cladding that surrounds the core. The first fusion splice portion is disposed closer to the laser unit than is the second fusion splice portion. At least a part of the core in the first fusion splice portion contains a dopant that is the same type as a dopant contained in the cladding in the first fusion splice portion for decreasing a refractive index.Type: GrantFiled: March 11, 2020Date of Patent: March 21, 2023Assignee: FUJIKURA LTD.Inventors: Yutaka Yamaguchi, Shinichi Sakamoto, Yasuto Chiba, Tatsuya Kishi
-
Publication number: 20220276433Abstract: An optical combiner includes: a plurality of first input optical fibers that each include a core; a bridge fiber that includes a bridge input surface connected to the cores of the plurality of first input optical fibers, a diameter reduction portion having a diameter that decreases away from the bridge input surface along an optical axis of the optical combiner, and a bridge output surface located opposite to the bridge input surface along the optical axis; an intermediate optical fiber that includes a core connected to the bridge output surface of the bridge fiber; a second input optical fiber that includes a core; and an output optical fiber that includes a first optical waveguide connected to the core of the intermediate optical fiber, and a second optical waveguide connected to the core of the second input optical fiber.Type: ApplicationFiled: September 24, 2020Publication date: September 1, 2022Applicant: FUJIKURA LTD.Inventors: Tomoyuki Fujita, Ryokichi Matsumoto, Yutaka Yamaguchi, Takuya Kobayashi, Kiwamu Suzuki
-
Patent number: 11347139Abstract: A wavelength conversion element includes a fluorescent portion in which fluorescent particles are dispersed in a binder. The fluorescent portion has a first surface and a second surface which are opposite to each other in a thickness direction and excitation light is irradiated from a second surface side. A volume density of the fluorescent particles in a first portion is higher than that in a second portion where the fluorescent portion is divided in the thickness direction into two of the first portion on a first surface side and the second portion on the second surface side. A thickness of the fluorescent portion is at least 5 times as long as an average particle size of the fluorescent particles.Type: GrantFiled: November 24, 2020Date of Patent: May 31, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Yutaka Yamaguchi, Masayuki Abe, Minoru Ohkoba, Daisuke Ogawa
-
Publication number: 20220123515Abstract: A laser device includes at least one light source; a delivery fiber configured to propagate laser light launched from the light source; a monitor fiber optically coupled to the delivery fiber and configured to propagate a part of the light propagating in a direction opposite to a propagation direction of the laser light in the delivery fiber, and a light receiving unit configured to receive the light propagated by the monitor fiber. The light receiving unit is configured to detect first light included in a wavelength band of visible light.Type: ApplicationFiled: February 27, 2020Publication date: April 21, 2022Applicant: Fujikura Ltd.Inventors: Takashi Hasunuma, Shinichi Sakamoto, Yasuto Chiba, Wataru Kiyoyama, Yutaka Yamaguchi
-
Patent number: 11310448Abstract: An imaging apparatus includes an optical low-pass filter that includes first, second, third, and fourth optical anisotropic elements configured to separate an incident ray into a plurality of rays, and a retardation plate disposed between two optical anisotropic elements adjacent to each other among the first to fourth optical anisotropic elements, and an image sensor configured to photoelectrically convert an optical image formed by light that has passed the optical low-pass filter. A predetermined condition is satisfied.Type: GrantFiled: December 18, 2019Date of Patent: April 19, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Yutaka Yamaguchi, Kazuhiko Momoki
-
Publication number: 20220091324Abstract: A laser device includes: a laser unit that outputs laser light; an output end that launches the laser light; a first fusion splice portion; and a second fusion splice portion. In each of the first fusion splice portion and the second fusion splice portion, two multi-mode fibers are fusion-spliced. Each of the two multi-mode fibers include a core through which the laser light propagates and a cladding that surrounds the core. The first fusion splice portion is disposed closer to the laser unit than is the second fusion splice portion. At least a part of the core in the first fusion splice portion contains a dopant that is the same type as a dopant contained in the cladding in the first fusion splice portion for decreasing a refractive index.Type: ApplicationFiled: March 11, 2020Publication date: March 24, 2022Applicant: Fujikura Ltd.Inventors: Yutaka Yamaguchi, Shinichi Sakamoto, Yasuto Chiba, Tatsuya Kishi
-
Publication number: 20220094132Abstract: A laser device includes at least one light source; a delivery fiber that is configured to propagate of laser light emitted from the light source; and a first light detection unit and a second light detection unit configured to detect a part of light propagating in a direction opposite to a propagation direction of the laser light through the delivery fiber. The first light detection unit detects first light included in a wavelength band of visible light. The second light detection unit detects second light included in a wavelength band of near-infrared light.Type: ApplicationFiled: February 27, 2020Publication date: March 24, 2022Applicant: Fujikura Ltd.Inventors: Shinichi Sakamoto, Yasuto Chiba, Wataru Kiyoyama, Yutaka Yamaguchi, Takashi Hasunuma
-
Publication number: 20210080815Abstract: A wavelength conversion element includes a fluorescent portion in which fluorescent particles are dispersed in a binder. The fluorescent portion has a first surface and a second surface which are opposite to each other in a thickness direction and excitation light is irradiated from a second surface side. A volume density of the fluorescent particles in a first portion is higher than that in a second portion where the fluorescent portion is divided in the thickness direction into two of the first portion on a first surface side and the second portion on the second surface side. A thickness of the fluorescent portion is at least 5 times as long as an average particle size of the fluorescent particles.Type: ApplicationFiled: November 24, 2020Publication date: March 18, 2021Inventors: Yutaka Yamaguchi, Masayuki Abe, Minoru Ohkoba, Daisuke Ogawa
-
Patent number: 10884329Abstract: A wavelength conversion element includes a fluorescent portion in which fluorescent particles are dispersed in a binder. The fluorescent portion has a first surface and a second surface which are opposite to each other in a thickness direction and excitation light is irradiated from a second surface side. A volume density of the fluorescent particles in a first portion is higher than that in a second portion where the fluorescent portion is divided in the thickness direction into two of the first portion on a first surface side and the second portion on the second surface side. A thickness of the fluorescent portion is at least 5 times as long as an average particle size of the fluorescent particles.Type: GrantFiled: November 16, 2018Date of Patent: January 5, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Yutaka Yamaguchi, Masayuki Abe, Minoru Ohkoba, Daisuke Ogawa
-
Publication number: 20200228732Abstract: An imaging apparatus includes an optical low-pass filter that includes first, second, third, and fourth optical anisotropic elements configured to separate an incident ray into a plurality of rays, and a retardation plate disposed between two optical anisotropic elements adjacent to each other among the first to fourth optical anisotropic elements, and an image sensor configured to photoelectrically convert an optical image formed by light that has passed the optical low-pass filter. A predetermined condition is satisfied.Type: ApplicationFiled: December 18, 2019Publication date: July 16, 2020Inventors: Yutaka Yamaguchi, Kazuhiko Momoki
-
Patent number: 10712636Abstract: The polarization acquisition apparatus is configured to allow an image capturing system including an interchangeable lens and an image capturing apparatus to perform image capturing using polarized light. The polarization acquisition apparatus includes a variable polarization axis element in which a direction of its polarization transmission axis is variable, a driver configured to operate the variable polarization axis element so as to change the direction of the polarization transmission axis, a first mount to which the image capturing apparatus is detachably attachable, and a second mount to which the interchangeable lens is detachably attachable. The driver is configured to operate the variable polarization axis element so as to change the direction of the polarization transmission axis to at least three directions when the image capturing is performed multiple times.Type: GrantFiled: June 22, 2016Date of Patent: July 14, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Rie Ishimatsu, Kazuhiko Momoki, Yutaka Yamaguchi
-
Patent number: 10606148Abstract: An optical low-pass filter includes a stack of N (N?3) optical anisotropic layers each configured to separate an incident ray into a plurality of rays, wherein the following condition is satisfied: Ds?0.50 Da, where Da [?m] is a total value of ray separation widths of the first to (N?1)th optical anisotropic layers among the N optical anisotropic layers, and Ds [?m] is a distance between a ray having a maximum phase difference and a ray having a minimum phase difference among the rays separated by the first to (N?1)th optical anisotropic layers.Type: GrantFiled: August 1, 2018Date of Patent: March 31, 2020Assignee: CANON KABUSHIKI KAISHAInventor: Yutaka Yamaguchi
-
Patent number: 10386649Abstract: An optical apparatus includes a first phase plate which gives a fixed relative phase difference by ?/2 between a polarization component in a slow axis direction and a polarization component in a fast axis direction, a second phase plate which gives a relative phase difference between a polarization component in a slow axis direction and a polarization component in a fast axis direction, a polarizer which extracts a polarization component to be guided to the image pickup element, and a setter which sets the relative phase difference of the second phase plate, the slow axis direction of the second phase plate is inclined with respect to each of the slow and fast axes directions of the first phase plate, and the setter sets the relative phase difference of the second phase plate depending on the polarization component of light.Type: GrantFiled: February 2, 2016Date of Patent: August 20, 2019Assignee: CANON KABUSHIKI KAISHAInventor: Yutaka Yamaguchi
-
Publication number: 20190226501Abstract: A turbocharger includes a compressor housing having an accommodation depression, a return passage, a ring member, and a covering member mounted to the compressor housing. The return passage has an inlet, an outlet, and a communication passage through which the inlet is connected to the outlet. A bottom surface of the accommodation depression has an inlet forming surface that cooperates with the ring member to form the inlet. The communication passage is formed between an inner peripheral surface of the accommodation depression and an outer peripheral surface of the ring member. The covering member has a falling prevention portion and an outlet forming surface. The outlet forming surface cooperates with the ring member to form the outlet. The falling prevention portion is located between the ring member and the outlet forming surface, and contacts the ring member to prevent the ring member from falling off the accommodation depression.Type: ApplicationFiled: January 21, 2019Publication date: July 25, 2019Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Tatsuya ARAKAWA, Hidetoshi HARIMA, Shuichi HIROTA, Yutaka YAMAGUCHI, Kazushige MURAO
-
Patent number: 10317589Abstract: An optical low-pass filter is arranged on an object side than an image sensor in an image pickup apparatus and has an unevenness shape. The conditions of 5.0 ?m??z?80.0 ?m and 1.0?Ps/<Pf>?20.0 are satisfied where ?z represents a distance between the optical low-pass filter and the image sensor, Ps represents a pixel pitch of the image sensor, and <Pf> represents an average pitch of the unevenness shape.Type: GrantFiled: May 3, 2016Date of Patent: June 11, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Kei Ueda, Kazuhiko Momoki, Yutaka Yamaguchi
-
Publication number: 20190101814Abstract: A wavelength conversion element includes a fluorescent portion in which fluorescent particles are dispersed in a binder. The fluorescent portion has a first surface and a second surface which are opposite to each other in a thickness direction and excitation light is irradiated from a second surface side. A volume density of the fluorescent particles in a first portion is higher than that in a second portion where the fluorescent portion is divided in the thickness direction into two of the first portion on a first surface side and the second portion on the second surface side. A thickness of the fluorescent portion is at least 5 times as long as an average particle size of the fluorescent particles.Type: ApplicationFiled: November 16, 2018Publication date: April 4, 2019Inventors: Yutaka Yamaguchi, Masayuki Abe, Minoru Ohkoba, Daisuke Ogawa
-
Publication number: 20190049820Abstract: An optical low-pass filter includes a stack of N (N?3) optical anisotropic layers each configured to separate an incident ray into a plurality of rays, wherein the following condition is satisfied: Ds?0.50 Da, where Da [?m] is a total value of ray separation widths of the first to (N?1)th optical anisotropic layers among the N optical anisotropic layers, and Ds [?m] is a distance between a ray having a maximum phase difference and a ray having a minimum phase difference among the rays separated by the first to (N?1)th optical anisotropic layers.Type: ApplicationFiled: August 1, 2018Publication date: February 14, 2019Inventor: Yutaka Yamaguchi