Patents by Inventor Syuhei Yamamoto
Syuhei Yamamoto 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: 20180307069Abstract: The liquid crystal display element includes: two transparent substrates; a liquid crystal composition sandwiched between the two transparent substrates and containing one or two or more liquid crystal compounds; and a polymer or copolymer that is included in the liquid crystal composition, the polymer or copolymer being a cured product of a polymerizable composition that contains one or two or more polymerizable compounds and a photopolymerization initiator having a maximum absorption wavelength peak at 310 nm to 380 nm. The content of the polymerizable composition is 1% by mass or more and less than 40% by mass based on the total weight of the polymerizable composition and the liquid crystal composition.Type: ApplicationFiled: August 9, 2016Publication date: October 25, 2018Applicant: DIC CorporationInventors: Fumiaki Kodera, Keumhee Jang, Toru Fujisawa, Hiroshi Hasebe, Haruyoshi Takatsu, Marina Goto, Go Sudo, Syuhei Yamamoto
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Patent number: 7839908Abstract: Provided is a device capable of oscillating a plurality of oscillation modes within a laser medium for obtaining a fundamental wave output which is easy in output scaling and high in luminance, thereby enabling a second harmonic conversion which is high in efficiency. The device includes: a laser medium (5) that is planar, has a waveguide structure in a thickness direction of a cross-section that is perpendicular to an optical axis (6), and has a cyclic lens effect in a direction perpendicular to the optical axis (6) and the thickness direction; a clad (4) that is bonded onto one surface of the laser medium (5); and heat sink (3) that is bonded onto one surface side of the laser medium (5) through the clad (4), and in the device, a laser oscillation includes a laser oscillation that oscillates in a waveguide mode of the laser medium (5), and a laser oscillation that oscillates in a plurality of resonator modes that are generated by a cyclic lens effect of the laser medium (5).Type: GrantFiled: March 30, 2005Date of Patent: November 23, 2010Assignee: Mitsubishi Electric CorporationInventors: Takayuki Yanagisawa, Yoshihito Hirano, Syuhei Yamamoto, Masao Imaki, Kiyohide Sakai, Yasuharu Koyata
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Publication number: 20080095202Abstract: Provided is a device capable of oscillating a plurality of oscillation modes within a laser medium for obtaining a fundamental wave output which is easy in output scaling and high in luminance, thereby enabling a second harmonic conversion which is high in efficiency. The device includes: a laser medium (5) that is planar, has a waveguide structure in a thickness direction of a cross-section that is perpendicular to an optical axis (6), and has a cyclic lens effect in a direction perpendicular to the optical axis (6) and the thickness direction; a clad (4) that is bonded onto one surface of the laser medium (5); and heat sink (3) that is bonded onto one surface side of the laser medium (5) through the clad (4), and in the device, a laser oscillation includes a laser oscillation that oscillates in a waveguide mode of the laser medium (5), and a laser oscillation that oscillates in a plurality of resonator modes that are generated by a cyclic lens effect of the laser medium (5).Type: ApplicationFiled: March 30, 2005Publication date: April 24, 2008Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Takayuki Yanagisawa, Yoshihito Hirano, Syuhei Yamamoto, Masao Imaki, Kiyohide Sakai, Yasuharu Koyata
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Publication number: 20080025362Abstract: A pumping module includes a solid state laser medium 3 having a light incidence surface 3a which is bonded to a slab waveguide 2 and which accepts pumping light 1 propagating through the slab waveguide 2, for absorbing the pumping light 1 introduced thereinto via the light incidence surface 3a to amplify laser light, a total reflection film 4 for total-reflecting the laser light which emerges from an opposite surface 3b of the solid state laser medium 3, and an antireflection coating 7 for making the laser light total-reflected by the total reflection film 4 pass therethrough to output the laser light to outside the pumping module. As a result, the pumping module can output high-intensity high-power laser light.Type: ApplicationFiled: June 28, 2004Publication date: January 31, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Syuhei Yamamoto, Takayuki Yanagisawa, Yoshihito Hirano
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Patent number: 7295290Abstract: To obtain a coherent laser radar device that realizes high reliability and the high output of a transmitted light, the device includes a first optical coupler that branches a laser beam from a laser source into two lights, a local light and a transmitted light, an optical modulator that modulates the transmitted light, a space type optical amplifier that amplifies the modulated transmitted light, a transmitting/receiving optical system that applies the amplified transmitted light toward a target and receives a scattered light from the target, a transmitting/receiving light splitting device that splits the transmitted light and the received light, a second optical coupler that mixes the local light and the split received light together, a photodetector that detects heterodyne of a mixed light, a beat signal amplifier that amplifies a detected signal, a signal processing device that processes an amplified signal, and a display device that displays a processed result.Type: GrantFiled: May 30, 2003Date of Patent: November 13, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takayuki Yanagisawa, Syuhei Yamamoto, Yoshihito Hirano, Shumpei Kameyama, Toshiyuki Ando
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Patent number: 7239654Abstract: On a plate of birefringent crystal made of an LiNbO3 crystal or an LiTaO3 crystal, a conductive substance is adhered to the whole periphery of side surfaces of the plate that intersect an incident surface of a laser beam, thereby to form a wave plate. A polarizer is provided at the latter stage of the wave plate. A wavelength is monitored based on an output from the polarizer. With this arrangement, based on the use of the LiNbO3 crystal or the LiTaO3 crystal that can be manufactured by a large quantity at low cost, it is possible to obtain polarization characteristics and wavelength discrimination characteristics that are stable against environmental changes such as temperature and external stress, by suppressing the pyroelectric effect and the piezoelectric effect of these materials.Type: GrantFiled: October 31, 2002Date of Patent: July 3, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masao Imaki, Syuhei Yamamoto, Youhei Mikami, Yoshihito Hirano, Makoto Satou, Kenji Masuda, Yasunori Nishimura, Yuji Masuyama
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Publication number: 20060182162Abstract: A pumping module includes a plate-shaped solid state laser medium, a reflecting member disposed on a surface of the laser medium which is opposite to a light incidence surface of the laser medium, for reflecting laser light incident upon the laser medium via the light incidence surface and propagating through the laser medium, and a heat sink for removing heat transferred thereto, via the reflecting member, from the laser medium, the light incidence surface having a size of a in a direction perpendicular to a plane defined by both the optical axis of the laser light and the normal to the light incidence surface, and a size of b in a longitudinal direction perpendicular to the former direction and the normal, the sizes having a relationship given by b=a/cos ?, where ? is an incidence angle at which the laser light is incident upon the light incidence surface.Type: ApplicationFiled: July 29, 2003Publication date: August 17, 2006Inventors: Takayuki Yanagisawa, Syuhei Yamamoto, Yoshihito Hirano
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Publication number: 20060071846Abstract: To obtain a coherent laser radar device that realizes high reliability and the high output of a transmitted light, the device includes a first optical coupler that branches a laser beam from a laser source into two lights, a local light and a transmitted light, an optical modulator that modulates the transmitted light, a space type optical amplifier that amplifies the modulated transmitted light, a transmitting/receiving optical system that applies the amplified transmitted light toward a target and receives a scattered light from the target, a transmitting/receiving light splitting device that splits the transmitted light and the received light, a second optical coupler that mixes the local light and the split received light together, a photodetector that detects heterodyne of a mixed light, a beat signal amplifier that amplifies a detected signal, a signal processing device that processes an amplified signal, and a display device that displays a processed result.Type: ApplicationFiled: May 30, 2003Publication date: April 6, 2006Inventors: Yakayuki Yanagisawa, Syuhei Yamamoto, Yoshihito Hirano, Shumpei Kameyama, Toshiyuki Ando
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Publication number: 20040094698Abstract: On a plate of birefringent crystal made of an LiNbO3 crystal or an LiTaO3 crystal, a conductive substance is adhered to the whole periphery of side surfaces of the plate that intersect an incident surface of a laser beam, thereby to form a wave plate. A polarizer is provided at the latter stage of the wave plate. A wavelength is monitored based on an output from the polarizer. With this arrangement, based on the use of the LiNbO3 crystal or the LiTaO3 crystal that can be manufactured by a large quantity at low cost, it is possible to obtain polarization characteristics and wavelength discrimination characteristics that are stable against environmental changes such as temperature and external stress, by suppressing the pyroelectric effect and the piezoelectric effect of these materials.Type: ApplicationFiled: December 12, 2003Publication date: May 20, 2004Inventors: Masao Imaki, Syuhei Yamamoto, Youhei Mikami, Yoshihito Hirano, Makoto Satou, Kenji Masuda, Yasunori Nishimura, Yuji Masuyama