Patents by Inventor Mitsuo Usui
Mitsuo Usui 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: 10649147Abstract: An optical module that is connectable to an optical fiber array and that can be packaged in a high density. Two package modules are mounted on a board, and optical waveguides in a Si photonic lightwave circuit mounted on the package module are connected to an optical fiber array fixed to an optical fiber block. Moreover, output end surfaces of the optical waveguides in the Si photonic lightwave circuit are perpendicular to a mount surface of the package module. The optical waveguides in the Si photonic lightwave circuit may be tilted at an appropriate angle with respect to a direction perpendicular to a right end surface. Moreover, the optical fiber block fixes optical fibers with the optical fibers tilted with respect to a direction perpendicular to an end surface connected to the Si photonic lightwave circuit.Type: GrantFiled: May 12, 2017Date of Patent: May 12, 2020Assignees: NTT ELECTRONICS CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Tomohiro Nakanishi, Teruaki Sato, Motohaya Ishii, Satoru Konno, Yuichi Suzuki, Shigeo Nagashima, Shinji Mino, Shuichiro Asakawa, Hiroshi Fukuda, Shin Kamei, Shunichi Soma, Ken Tsuzuki, Mitsuo Usui, Takashi Saida
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Publication number: 20190353844Abstract: An optical module which is connectable to an optical fiber array and which can be packaged in a high density. Two 30 mm square package modules are mounted on a board, and optical waveguides in a 20 mm square Si photonic lightwave circuit mounted on the package module are connected to an optical fiber array fixed to an optical fiber block (15×10 mm). Moreover, output end surfaces of the optical waveguides in the Si photonic lightwave circuit are perpendicular to a mount surface of the package module. In the embodiment, the optical waveguides in the Si photonic lightwave circuit are tilted at an appropriate angle, for example, 20 degrees with respect to a direction perpendicular to a right end surface. Moreover, the optical fiber block fixes optical fibers with the optical fibers tilted at 20 degrees with respect to a direction perpendicular to an end surface connected to the Si photonic lightwave circuit.Type: ApplicationFiled: May 12, 2017Publication date: November 21, 2019Inventors: Tomohiro Nakanishi, Teruaki Sato, Motohaya Ishii, Satoru Konno, Yuichi Suzuki, Shigeo Nagashima, Shinji Mino, Shuichiro Asakawa, Hiroshi Fukuda, Shin Kamei, Shunichi Soma, Ken Tsuzuki, Mitsuo Usui, Takashi Saida
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Patent number: 10165690Abstract: In a conventional soldering method, an FPC-side electrode pad and a package-side electrode pad are closely joined together with a solder layer, and the soldered state after a joining process has not been easily confirmed visually. The present invention provides a solder joint structure including a side face electrode which is formed on each of the side faces of the end parts of an FPC board and a package or PCB board that are to be soldered, extending vertically relative to the faces constituting each of electrode pads on the boards, and which introduces solder. On the side face electrodes of the board end parts, a part of solder that is formed continuously from the solder joint portion is visible and the state of the solder joint between the electrode pads on the two boards can be confirmed. The efficiency of solder joint tests can be improved.Type: GrantFiled: June 17, 2016Date of Patent: December 25, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Mitsuo Usui, Kiyofumi Kikuchi, Ken Tsuzuki, Hiroshi Fukuda, Shuichiro Asakawa, Shin Kamei, Shunichi Soma, Takashi Saida
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Publication number: 20180199445Abstract: In a conventional soldering method, an FPC-side electrode pad and a package-side electrode pad are closely joined together with a solder layer, and the soldered state after a joining process has not been easily confirmed visually. The present invention provides a solder joint structure including a side face electrode which is formed on each of the side faces of the end parts of an FPC board and a package or PCB board that are to be soldered, extending vertically relative to the faces constituting each of electrode pads on the boards, and which introduces solder. On the side face electrodes of the board end parts, a part of solder that is formed continuously from the solder joint portion is visible and the state of the solder joint between the electrode pads on the two boards can be confirmed. The efficiency of solder joint tests can be improved.Type: ApplicationFiled: June 17, 2016Publication date: July 12, 2018Inventors: Mitsuo Usui, Kiyofumi Kikuchi, Ken Tsuzuki, Hiroshi Fukuda, Shuichiro Asakawa, Shin Kamei, Shunichi Soma, Takashi Saida
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Patent number: 8699832Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.Type: GrantFiled: March 29, 2010Date of Patent: April 15, 2014Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics CorporationInventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
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Patent number: 8599460Abstract: A movable beam (182a) and a movable beam (182b) each having one end fixed to a frame portion (181) of a mirror substrate (108) are provided inside the frame portion (181). The movable beam (182a) and the movable beam (182b) each having one end fixed to a corresponding to one of two opposite inner sides of the frame portion (181) are aligned at a predetermined distance on the same line in the direction in which the two sides face each other. Each of the movable beam (182a) and the movable beam (182b) has the other end displaceable in the normal line direction of the mirror substrate (108) and therefore has a cantilever structure. A mirror (183) is arranged between the movable beam (182a) and the movable beam (182b) and connected to them via a pair of connectors (109a, 109b).Type: GrantFiled: April 15, 2008Date of Patent: December 3, 2013Assignee: Nippon Telegraph and Telephone CorporationInventors: Mitsuo Usui, Shingo Uchiyama, Fusao Shimokawa, Etsu Hashimoto, Johji Yamaguchi, Tohru Matsuura, Toshifumi Konishi
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Patent number: 8482843Abstract: A MEMS device includes a mirror substrate (200), an electrode substrate (301) arranged so as to face the mirror substrate (200), a mirror (230) serving as a movable member rotatably supported in an opening portion of the mirror substrate (200) via support members, a driving electrode (101) arranged on an insulating film (104) on a surface of the electrode substrate (301) facing the mirror substrate (200) so as to face the mirror (230) across a gap and drive the mirror (230), and a lower electrode (103) made of a metal or a semiconductor and formed under the insulating film (104) exposed to the gap so as to be in contact with the insulating film (104).Type: GrantFiled: March 2, 2009Date of Patent: July 9, 2013Assignee: Nippon Telegraph and Telephone CorporationInventors: Shingo Uchiyama, Fusao Shimokawa, Tomomi Sakata, Nobuhiro Shimoyama, Mitsuhiro Makihara, Mitsuo Usui
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Publication number: 20120093458Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.Type: ApplicationFiled: March 29, 2010Publication date: April 19, 2012Inventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
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Publication number: 20110013256Abstract: A MEMS device includes a mirror substrate (200), an electrode substrate (301) arranged so as to face the mirror substrate (200), a mirror (230) serving as a movable member rotatably supported in an opening portion of the mirror substrate (200) via support members, a driving electrode (101) arranged on an insulating film (104) on a surface of the electrode substrate (301) facing the mirror substrate (200) so as to face the mirror (230) across a gap and drive the mirror (230), and a lower electrode (103) made of a metal or a semiconductor and formed under the insulating film (104) exposed to the gap so as to be in contact with the insulating film (104).Type: ApplicationFiled: March 3, 2009Publication date: January 20, 2011Inventors: Shingo Uchiyama, Fusao Shimokawa, Tomomi Sakata, Nobuhiro Shimoyama, Mitsuhiro Makihara, Mitsuo Usui
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Publication number: 20100118372Abstract: A movable beam (182a) and a movable beam (182b) each having one end fixed to a frame portion (181) of a mirror substrate (108) are provided inside the frame portion (181). The movable beam (182a) and the movable beam (182b) each having one end fixed to a corresponding to one of two opposite inner sides of the frame portion (181) are aligned at a predetermined distance on the same line in the direction in which the two sides face each other. Each of the movable beam (182a) and the movable beam (182b) has the other end displaceable in the normal line direction of the mirror substrate (108) and therefore has a cantilever structure. A mirror (183) is arranged between the movable beam (182a) and the movable beam (182b) and connected to them via a pair of connectors (109a, 109b).Type: ApplicationFiled: April 15, 2008Publication date: May 13, 2010Inventors: Mitsuo Usui, Shingo Uchiyama, Fusao Shimokawa, Etsu Hashimoto, Johji Yamaguchi, Tohru Matsuura, Toshifumi Konishi
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Patent number: 6491442Abstract: In an optical fiber connector (1), an outer member (2) holds a portion of an optical fiber (4A) remote from its connecting end which is connectable to a connecting end of a counterpart optical fiber. An aligning member (3) is held by the outer member so as to be movable along the optical fiber. The aligning member carries out positioning of the connecting end of the optical fiber. The aligning member is urged by a spring (5) in a direction to project from the outer member. When connecting the optical fiber to the counterpart optical fiber, the aligning member is moved in a direction opposite to the foregoing direction against an urging force applied by the spring so that the connecting end of the optical fiber is projected from the aligning member.Type: GrantFiled: June 29, 1999Date of Patent: December 10, 2002Assignee: Japan Aviation Electronics IndustryInventors: Keiji Murakami, Makoto Yamashita, Jun Takeda, Yasuhiro Ando, Nobuo Sato, Mitsuo Usui, Kohsuke Katsura
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Patent number: 5999670Abstract: An optical waveguide of an optical deflector comprising a planar optical waveguide or an optical fiber type optical waveguide is cut while perpendicularly pressing a blade having a blade tip with an angle of inclination against the optical waveguide at a desired location thereof to form an oblique end face serviceable as an oblique end face mirror.Type: GrantFiled: July 30, 1997Date of Patent: December 7, 1999Assignee: Nippon Telegraph and Telephone CorporationInventors: Ryoko Yoshimura, Makoto Hikita, Satoru Tomaru, Saburo Imamura, Mitsuo Usui, Kosuke Katsura
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Patent number: 5672672Abstract: A polymeric optical material which is a mixture of a polysiloxane and at least one compound selected from the group consisting of polyisocyanate, silane, alkoxide and chelate, and an optical waveguide fabricated from the polymeric optical material having high thermal stability and low propagation loss over wide range. The polysiloxane may have, for example, a repeating unit of following formula (I): ##STR1## wherein each of R.sub.1 and R.sub.2 is independently an alkyl, deuterated alkyl or halogenated alkyl group, or a phenyl, deuterated phenyl or halogenated phenyl group. The optical waveguide includes a substrate, a clad layer provided on the substrate and a core layer surrounded by the clad layer. The clad layer is composed of a lower clad layer which is overlaid onto the substrate and an upper clad layer which surrounds the core layer.Type: GrantFiled: October 26, 1995Date of Patent: September 30, 1997Assignee: Nippon Telegraph and Telephone CorporationInventors: Michiyuki Amano, Toshio Watanabe, Mitsuo Usui, Shungo Sugawara, Shoichi Hayashida, Saburo Imamura