Patents by Inventor Akiyuki Tate
Akiyuki Tate 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: 7682564Abstract: The present invention relates to a benzene detecting element capable of detecting benzene selectively and highly sensitively, and a preparation process thereof. The benzene detecting element of the present invention is a mesoporous silicate for detecting benzene selectively and highly sensitively in atmospheric air, and the detecting element has a nanosized fine pore having a highly ordered periodic fine pore structure, and the wall of the nanosized fine pore has a sub-nanosized fine pore. The nanosized fine pore has a pore size of from 0.15 nm to 50 nm in radius, the sub-nanosized fine pore has a pore size of from 0.05 to 0.5 nm in radius, and at least the sub-nanosized fine pore among the fine pores is modified with an organosilicon functional group having a phenyl group, or a silanol group. The present invention also relates to a preparation process of the detecting element.Type: GrantFiled: December 17, 2004Date of Patent: March 23, 2010Assignee: Nippon Telegraph and Telephone CorporationInventors: Yuko Ueno, Akiyuki Tate, Osamu Niwa
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Patent number: 7492975Abstract: The present invention provides an optical switch, an optical modulator, and a wavelength variable filter each of which has a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch according to the present invention includes a 3-dB coupler (16) placed on an input, a 3-dB coupler (17) placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section (18) that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: GrantFiled: March 18, 2004Date of Patent: February 17, 2009Assignee: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Patent number: 7356227Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: GrantFiled: October 4, 2006Date of Patent: April 8, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Patent number: 7340116Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: GrantFiled: October 4, 2006Date of Patent: March 4, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Patent number: 7336854Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: GrantFiled: October 4, 2006Date of Patent: February 26, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Publication number: 20070253659Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: ApplicationFiled: October 4, 2006Publication date: November 1, 2007Applicant: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Publication number: 20070092181Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-xO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: ApplicationFiled: October 4, 2006Publication date: April 26, 2007Applicant: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Publication number: 20070086691Abstract: An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<2, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: ApplicationFiled: October 4, 2006Publication date: April 19, 2007Applicant: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Publication number: 20070058896Abstract: The present invention provides an optical switch, an optical modulator, and a wavelength variable filter each of which has a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch according to the present invention includes a 3-dB coupler (16) placed on an output, a 3-dB coupler (17) placed on an output, and two optical waveguides connecting the input-side 3-dB coupler and the output-side 3-dB coupler together. The optical switch also includes a phase modulating section (18) that applies electric fields to one or both of the two optical waveguides. At least two optical waveguides are a crystal material including KTaxNb1-xO3 (0<x<1) and KxLi1-xTayNb1-yO3 (0<x<1, 0<y<1), or KTaxNb1-xO3 or KxLi1-xTayNb1-yO3.Type: ApplicationFiled: March 18, 2004Publication date: March 15, 2007Applicant: Nippon Telegraph and Telephone CorporationInventors: Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Makoto Shimokozono, Tadayuki Imai, Akiyuki Tate, Touru Matsuura, Takashi Kurihara, Hiroshi Fushimi
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Publication number: 20060258015Abstract: The present invention relates to a benzene detecting element capable of detecting benzene selectively and highly sensitively, and a preparation process thereof. The benzene detecting element of the present invention is a mesoporous silicate for detecting benzene selectively and highly sensitively in atmospheric air, and the detecting element has a nanosized fine pore having a highly ordered periodic fine pore structure, and the wall of the nanosized fine pore has a sub-nanosized fine pore. The nanosized fine pore has a pore size of from 0.15 nm to 50 nm in radius, the sub-nanosized fine pore has a pore size of from 0.05 to 0.5 nm in radius, and at least the sub-nanosized fine pore among the fine pores is modified with an organosilicon functional group having a phenyl group, or a silanol group. The present invention also relates to a preparation process of the detecting element.Type: ApplicationFiled: December 17, 2004Publication date: November 16, 2006Inventors: Yuko Ueno, Akiyuki Tate, Osamu Niwa
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Patent number: 6281994Abstract: A method and an apparatus for three-dimensional holographic display suitable for moving object display are disclosed. At least one hologram of a display target object is displayed on a display device, and a non-scattered light is irradiated onto the display device to produce a scattered light. Then the scattered light from the display device as an object light of the display target object and the non-scattered light as a reference light are irradiated simultaneously at different incident angles onto a photorefractive medium having a photorefractive effect, and interference fringes generated by the object light and the reference light are recorded in the photorefractive medium. Then, the three-dimensional image is displayed by irradiating only the non-scattered light onto the photorefractive medium so as to reproduce a holographic image corresponding to the interference fringes recorded in the photorefractive medium.Type: GrantFiled: December 21, 1999Date of Patent: August 28, 2001Assignee: Nippon Telegraph and Telephone CorporationInventors: Tsutomu Horikoshi, Haruhiko Kojima, Noboru Sonehara, Masahiro Sasaura, Tadayuki Imai, Shogo Yagi, Akiyuki Tate, Kazuhito Higuchi, Takaaki Akimoto
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Patent number: 4426434Abstract: An electrophotographic photoreceptor comprises an electrically conductive substrate, a layer of charge generating material which chloroaluminium phthalocyanine and chloroaluminium monochlorophthalocyanine are evaporated in a vacuum over the electrically conductive substrate and the evaporated film of chloroaluminium phthalocyanine and chloroaluminium monochlorophthalocyanine are treated by an organic solvent selected from the group consisting tetrohydrofurane, methanol, acetone, methyl ethyl ketone, .alpha.-chloronaphthalene, pyridine, a layer of charge transport material overcoated the layer of charge generating material. The electrophotographic photoreceptor and the preparation thereof is disclosed to apply for use in a laser printing machine in which a light of laser diode or light emission diode is used as a light source.Type: GrantFiled: June 14, 1982Date of Patent: January 17, 1984Assignee: Nippon Telegraph & Telephone Public Corp.Inventors: Koichi Arishima, Takeshi Okada, Akiyuki Tate, Hiroaki Hiratsuka