Patents by Inventor Noriyasu Shiga
Noriyasu Shiga 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: 20190134367Abstract: Provided is a microneedle manufacturing method and a microneedle manufacturing device which are capable of forming a hollow needle. A microneedle manufacturing method of the present invention includes: an optical vortex conversion step of converting a laser beam into optical vortex pulsed light having a helical polarization; a pointed structure forming step of forming a pointed structure on a workpiece to be processed by irradiation of the optical vortex pulsed light; and a pore forming step of forming a hole or pore in the pointed structure by irradiating the pointed structure with laser pulsed light. A spot size of the laser pulsed light is smaller than a spot size of the optical vortex pulsed light.Type: ApplicationFiled: June 20, 2017Publication date: May 9, 2019Inventors: Noriyasu Shiga, Yoichi Oikawa, Kunio Miyaji, Kohei Toyoda
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Patent number: 8659818Abstract: An optical-path-switching apparatus according to the present invention includes a reducing optical system capable of guiding signal light and control light along the direction of gravity into a thermal-lens-forming optical element having an incidence plane positioned to be perpendicular to the direction of gravity in such a way as to differentiate respective convergence points in a direction perpendicular to the optical axis. The apparatus further includes a light-receiving unit configured to converge or condense straight-traveling signal light in the absence of irradiation with the control light and signal light whose optical path has been switched due to irradiation with the control light using the same optical element. Further, the apparatus includes a wedge-type prism provided at a passing position of the optical-path-switched signal light to increase the distance between the optical axis of the optical-path-changed signal light and the optical axis of the straight-traveling signal light.Type: GrantFiled: March 29, 2011Date of Patent: February 25, 2014Assignees: National Institute of Advanced Industrial Science and Technology, Inter Energy Co., Ltd., Dainichiseika Color & ChemicalInventors: Ichiro Ueno, Takashi Hiraga, Noritaka Yamamoto, Hirobumi Watanabe, Shiro Futaki, Noriyasu Shiga, Norio Tanaka, Shigeru Takarada
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Publication number: 20130057945Abstract: An optical-path-switching apparatus according to the present invention includes a reducing optical system capable of guiding signal light and control light along the direction of gravity into a thermal-lens-forming optical element having an incidence plane positioned to be perpendicular to the direction of gravity in such a way as to differentiate respective convergence points in a direction perpendicular to the optical axis. The apparatus further includes a light-receiving unit configured to converge or condense straight-traveling signal light in the absence of irradiation with the control light and signal light whose optical path has been switched due to irradiation with the control light using the same optical element. Further, the apparatus includes a wedge-type prism provided at a passing position of the optical-path-switched signal light to increase the distance between the optical axis of the optical-path-changed signal light and the optical axis of the straight-traveling signal light.Type: ApplicationFiled: March 29, 2011Publication date: March 7, 2013Applicants: INTER ENERGY CO., LTD., National Institute of Advanced Industrial Science, DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.Inventors: Ichiro Ueno, Takashi Hiraga, Noritaka Yamamoto, Hirobumi Watanabe, Shiro Futaki, Noriyasu Shiga, Norio Tanaka, Shigeru Takarada
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Publication number: 20120301158Abstract: An optical receiver includes interference means 2 for branching the optical signal modulated in a DQPSK manner into two light beams, delaying at least one branched light beam so that two branched light beams have a predetermined phase difference, rotating the polarization plane of at least one branched light beam so that the polarization planes of the two branched light beams are orthogonal to each other, and coupling the two branched light beams, light separation adjusting means 3 to 5 for separating the output light beam from the interference means and adjusting the polarization planes of the separated light beams, and detection means 6 and 6? for detecting light intensities of the separated light beams output from the light separation adjusting means, wherein an I-component signal and a Q-component signal are generated on the basis of detection signals from the detection means.Type: ApplicationFiled: February 1, 2010Publication date: November 29, 2012Applicant: Sumitomo Osaka Cement Co., Ltd.Inventors: Masahito Mure, Kaoru Higuma, Toshio Kataoka, Norikazu Miyazaki, Masahide Miyachi, Youichi Oikawa, Noriyasu Shiga, Hiroshi Nagaeda
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Patent number: 8208770Abstract: An optical deflection apparatus includes a signal light source configured to emit signal light having one or more wavelengths, a control light source configured to emit control light having a wavelength different from the wavelength of the signal light, a thermal lens forming optical element including a light absorption layer configured to transmit the signal light and selectively absorb the control light, and a beam-condensing unit configured to cause beam-condensation of the control light and the signal light at different convergence points in the light absorption layer.Type: GrantFiled: June 2, 2010Date of Patent: June 26, 2012Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Takashi Hiraga, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga
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Patent number: 8180226Abstract: The present invention relates to an optical receiver, and particularly, to an optical receiver by which a DQPSK-modulated optical signal is demodulated to a multilevel phase-modulated signal.Type: GrantFiled: March 25, 2010Date of Patent: May 15, 2012Assignee: Sumitomo Osaka Cement Co., Ltd.Inventors: Masahito Mure, Masahide Miyachi, Kaoru Higuma, Norikazu Miyazaki, Toshio Kataoka, Hiroyuki Sato, Hiroshi Nagaeda, Noriyasu Shiga, Yoichi Oikawa
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Patent number: 8054524Abstract: A high-speed optical amplifier is considered to be an important optical device because of an increasing demand of routing, which is accompanied by an increase in complexity of networks. It is difficult to satisfy a response performance by related-art techniques, and there has been a problem in achieving a high-speed response performance of 10 microseconds or less. An optical amplifier according to the present invention includes: an input monitor means 500; an optical amplification means 310 including an optical amplification medium 300, and a control means 400 for performing feed-forward control. When the optical amplification means is controlled by the feed-forward control in response to a signal of the input monitor means 500, an overshoot signal is applied as a control signal so that a slow response performance specific to the optical amplification medium has been improved, and thereby high-speed response performance has been achieved.Type: GrantFiled: May 30, 2008Date of Patent: November 8, 2011Assignee: Trimatiz Ltd.Inventors: Hiroshi Nagaeda, Yoichi Oikawa, Noriyasu Shiga, Yoshiaki Horiuchi
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Publication number: 20110052212Abstract: The present invention relates to an optical receiver, and particularly, to an optical receiver by which a DQPSK-modulated optical signal is demodulated to a multilevel phase-modulated signal.Type: ApplicationFiled: March 25, 2010Publication date: March 3, 2011Applicants: Sumitomo Osaka Cement Co., Ltd., Trimatiz.Ltd.Inventors: Masahito Mure, Masahide Miyachi, Kaoru Higuma, Norikazu Miyazaki, Toshio Kataoka, Hiroyuki Sato, Hiroshi Nagaeda, Noriyasu Shiga, Yoichi Oikawa
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Patent number: 7826696Abstract: An optical deflection apparatus includes a signal light source configured to emit signal light having one or more wavelengths, a control light source configured to emit control light having a wavelength different from the wavelength of the signal light, a thermal lens forming optical element including a light absorption layer configured to transmit the signal light and selectively absorb the control light, and a beam-condensing unit configured to cause beam-condensation of the control light and the signal light at different convergence points in the light absorption layer.Type: GrantFiled: February 21, 2007Date of Patent: November 2, 2010Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Takashi Hiraga, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga
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Publication number: 20100245960Abstract: An optical deflection apparatus includes a signal light source configured to emit signal light having one or more wavelengths, a control light source configured to emit control light having a wavelength different from the wavelength of the signal light, a thermal lens forming optical element including a light absorption layer configured to transmit the signal light and selectively absorb the control light, and a beam-condensing unit configured to cause beam-condensation of the control light and the signal light at different convergence points in the light absorption layer.Type: ApplicationFiled: June 2, 2010Publication date: September 30, 2010Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.Inventors: Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Takashi Hiraga, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga
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Publication number: 20100134862Abstract: A high-speed optical amplifier is considered to be an important optical device because of an increasing demand of routing, which is accompanied by an increase in complexity of networks. It is difficult to satisfy a response performance by related-art techniques, and there has been a problem in achieving a high-speed response performance of 10 microseconds or less. An optical amplifier according to the present invention includes: an input monitor means 500; an optical amplification means 310 including an optical amplification medium 300, and a control means 400 for performing feed-forward control. When the optical amplification means is controlled by the feed-forward control in response to a signal of the input monitor means 500, an overshoot signal is applied as a control signal so that a slow response performance specific to the optical amplification medium has been improved, and thereby high-speed response performance has been achieved.Type: ApplicationFiled: May 30, 2008Publication date: June 3, 2010Applicant: TRIMATIZ LTD.Inventors: Hiroshi Nagaeda, Yoichi Oikawa, Noriyasu Shiga, Yoshiaki Horiuchi
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Patent number: 7565040Abstract: An optical device using an electro-optical element is of great utility value to industry, owing to its fast responsiveness and the like. Prior art has problems such as high cost due to a large number of parts, large device size, and high drive voltage, and it has been a challenge to reduce the number of parts to be used, to downsize the device, and to reduce drive voltage. An optical device of the invention has a reflection structure comprising an input fiber 1 and an output fiber 2 which are fastened by a duplex ferrule 3, a collimating lens 6, and a reflector element 9 for reflecting light. The optical device further comprises a cylindrical lens functioning as a condenser lens 7, and an electro-optical element 8, which is placed near a collection point of the condenser lens 7. Electrodes of the electro-optical element 8 are configured such that the interelectrode distance becomes smaller the closer they are to the collection part.Type: GrantFiled: May 16, 2005Date of Patent: July 21, 2009Assignee: Trimatiz LimitedInventors: Hiroshi Nagaeda, Noriyasu Shiga
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Patent number: 7511894Abstract: A flip-flop circuit of the present invention includes a first switch and a second switch which are connected in series to each other. The first switch includes: two input ports upon which light source light and signal light are incident; two output ports for outputting an optical output; and a thermal lens forming element for forming a thermal lens in a predetermined optical inputting condition. Although the second switch is composed in the same manner as that of the first switch, a relation between the wave-lengths to be utilized is inverted. When a state is changed from OFF to ON, a pulse signal is inputted for setting and one of the rays of output light of the second switch is fed-back to the first switch so as to maintain the state of ON. When the state is changed from ON to OFF, a pulse of additional signal light is inputted. Due to the foregoing, the two states of ON and OFF can be stably maintained.Type: GrantFiled: February 9, 2007Date of Patent: March 31, 2009Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Takashi Hiraga, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Ichiro Ueno, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga
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Publication number: 20090022453Abstract: An optical deflection apparatus includes a signal light source configured to emit signal light having one or more wavelengths, a control light source configured to emit control light having a wavelength different from the wavelength of the signal light, a thermal lens forming optical element including a light absorption layer configured to transmit the signal light and selectively absorb the control light, and a beam-condensing unit configured to cause beam-condensation of the control light and the signal light at different convergence points in the light absorption layer.Type: ApplicationFiled: February 21, 2007Publication date: January 22, 2009Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTDInventors: Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Takashi Hiraga, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga
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Publication number: 20070291346Abstract: An optical device using an electro-optical element is of great utility value to industry, owing to its fast responsiveness and the like. Prior art has problems such as high cost due to a large number of parts, large device size, and high drive voltage, and it has been a challenge to reduce the number of parts to be used, to downsize the device, and to reduce drive voltage. An optical device of the invention has a reflection structure comprising an input fiber 1 and an output fiber 2 which are fastened by a duplex ferrule 3, a collimating lens 6, and a reflector element 9 for reflecting light. The optical device further comprises a cylindrical lens functioning as a condenser lens 7, and an electro-optical element 8, which is placed near a collection point of the condenser lens 7. Electrodes of the electro-optical element 8 are configured such that the interelectrode distance becomes smaller the closer they are to the collection part.Type: ApplicationFiled: May 16, 2005Publication date: December 20, 2007Applicant: TRIMATIZ LIMITEDInventors: Hiroshi Nagaeda, Noriyasu Shiga
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Publication number: 20070263426Abstract: A flip-flop circuit of the present invention includes a first switch and a second switch which are connected in series to each other. The first switch includes: two input ports upon which light source light and signal light are incident; two output ports for outputting an optical output; and a thermal lens forming element for forming a thermal lens in a predetermined optical inputting condition. Although the second switch is composed in the same manner as that of the first switch, a relation between the wave-lengths to be utilized is inverted. When a state is changed from OFF to ON, a pulse signal is inputted for setting and one of the rays of output light of the second switch is fed-back to the first switch so as to maintain the state of ON. When the state is changed from ON to OFF, a pulse of additional signal light is inputted. Due to the foregoing, the two states of ON and OFF can be stably maintained.Type: ApplicationFiled: February 9, 2007Publication date: November 15, 2007Inventors: Takashi Hiraga, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro, Ichiro Ueno, Norio Tanaka, Hiroshi Nagaeda, Noriyasu Shiga