Patents by Inventor Shigeru Takarada
Shigeru Takarada 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: 8798465Abstract: An optical path switching type optical signal transmission/reception apparatus includes a one-to-seven compatible optically controlled optical path switching apparatus 100 that is connected to a host optical signal transmission/reception apparatus 1 via an optical fiber, a total of seven subordinate optical communication adapters 110 connected via optical fibers, user side devices 160 connected to respective subordinate optical communication adapters via an electric circuit, an optical transmission/reception control circuit provided in each of the total of seven subordinate user side optical communication adapters 110, and including an uplink optical signal transmission mechanism, a downlink optical signal reception mechanism, a control light source that can generate control light to drive the optical path switching apparatus 100, in which a wavelength of the generated control light is different from a wavelength of signal light, and an optical communication oriented transmission/reception mechanism using theType: GrantFiled: April 14, 2010Date of Patent: August 5, 2014Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Inter Energy Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Norio Tanaka, Shigeru Takarada, Hirobumi Watanabe, Shiro Futaki, Ichiro Ueno, Takashi Hiraga, Noritaka Yamamoto
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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: 20120063777Abstract: An optical path switching type optical signal transmission/reception apparatus includes a one-to-seven compatible optically controlled optical path switching apparatus 100 that is connected to a host optical signal transmission/reception apparatus 1 via an optical fiber, a total of seven subordinate optical communication adapters 110 connected via optical fibers, user side devices 160 connected to respective subordinate optical communication adapters via an electric circuit, an optical transmission/reception control circuit provided in each of the total of seven subordinate user side optical communication adapters 110, and including an uplink optical signal transmission mechanism, a downlink optical signal reception mechanism, a control light source that can generate control light to drive the optical path switching apparatus 100, in which a wavelength of the generated control light is different from a wavelength of signal light, and an optical communication oriented transmission/reception mechanism using theType: ApplicationFiled: April 14, 2010Publication date: March 15, 2012Applicants: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, INTER ENERGY CO., LTD.Inventors: Norio Tanaka, Shigeru Takarada, Hirofumi Watanabe, Shiro Futaki, Ichiro Ueno, Takashi Hiraga, Noritaka Yamamoto
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Patent number: 8004748Abstract: A thermal lens forming element includes a first chamber serving as a control light absorbing region, which is configured as a columnar body or an N prismatic body (wherein N is an integer equal to or greater than 4) circumscribing the columnar body and filled with a control light absorbing dyestuff solution containing a solvent having a viscosity of 0 to 3 mPa·s at 160° C. or above and a ratio of the viscosity of the solvent at 160° C. to a viscosity of the solvent at 40° C. not less than 1 and not greater than 6, wherein the columnar body or the N prismatic body circumscribing the columnar body has a central axis coinciding with an optical axis of incident signal light. The first chamber is connected to a second chamber via a solution channel and a dam. The dyestuff solution and a bubble of an inert gas are confined in the second chamber.Type: GrantFiled: December 4, 2008Date of Patent: August 23, 2011Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Norio Tanaka, Shigeru Takarada, Takashi Hiraga, Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro
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Publication number: 20100265568Abstract: A thermal lens forming element includes a first chamber serving as a control light absorbing region, which is configured as a columnar body or an N prismatic body (wherein N is an integer equal to or greater than 4) circumscribing the columnar body and filled with a control light absorbing dyestuff solution containing a solvent having a viscosity of 0 to 3 mPa·s at 160° C. or above and a ratio of the viscosity of the solvent at 160° C. to a viscosity of the solvent at 40° C. not less than 1 and not greater than 6, wherein the columnar body or the N prismatic body circumscribing the columnar body has a central axis coinciding with an optical axis of incident signal light. The first chamber is connected to a second chamber via a solution channel and a dam. The dyestuff solution and a bubble of an inert gas are confined in the second chamber.Type: ApplicationFiled: December 4, 2008Publication date: October 21, 2010Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTDInventors: Norio Tanaka, Shigeru Takarada, Takashi Hiraga, Ichiro Ueno, Nobutaka Tanigaki, Noritaka Yamamoto, Toshiko Mizokuro
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Patent number: 7232853Abstract: Colored fine particulate resins can each be produced by bringing a colored resin, which comprises a thermally fusible resin and a colorant evenly distributed in the thermally fusible resin, into a molten state; forming the colored resin, which is in the molten state, into droplet-shaped fine particles in a non-dissolving medium which does not dissolve the colored resin; and then cooling and solidifying the droplet-shaped fine particles. The colored fine particulate resins are useful in image recording materials, printing materials and paints. Articles can be colored with the image recording materials, printing materials or paints.Type: GrantFiled: January 3, 2002Date of Patent: June 19, 2007Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Michiei Nakamura, Shigeru Takarada, Hiroyuki Shimanaka, Kotaro Ohshima, Shinya Tuchida
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Publication number: 20020128356Abstract: Colored fine particulate resins can each be produced by bringing a colored resin, which comprises a thermally fusible resin and a colorant evenly distributed in the thermally fusible resin, into a molten state; forming the colored resin, which is in the molten state, into droplet-shaped fine particles in a non-dissolving medium which does not dissolve the colored resin; and then cooling and solidifying the droplet-shaped fine particles. The colored fine particulate resins are useful in image recording materials, printing materials and paints. Articles can be colored with the image recording materials, printing materials or paints.Type: ApplicationFiled: January 3, 2002Publication date: September 12, 2002Applicant: Dainichiseika Color & Chem. Mfg. Co.,Ltd.Inventors: Michiei Nakamura, Shigeru Takarada, Hiroyuki Shimanaka, Kotaro Ohshima, Shinya Tuchida
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Patent number: 6368399Abstract: A composite pigment of a bluish green color comprises copper phthalocyanine and aluminum phthalocyanine which are preferably in the form of a mixture or solid solution. The composite pigment can be produced by mixing copper phthalocyanine and aluminum phthalocyanine into a mixture and then converting said mixture into a pigment form. A coloring composition comprises at least a resin and a pigment which comprises copper phthalocyanine and aluminum phthalocyanine. The coloring composition can be produced by mixing copper phthalocyanine and aluminum phthalocyanine which have been independently comminuted, into a composite pigment, and then kneading the pigment and a resin such that the pigment is dispersed in the resin. An image recording substance is produced using the coloring composition.Type: GrantFiled: July 12, 2000Date of Patent: April 9, 2002Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Masahiko Aoba, Yukio Kanbara, Shigeru Takarada, Kazutaka Aoki, Keiji Nakajima, Shotoku Takami
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Patent number: 6265708Abstract: The present invention provides a method of controlling light and an apparatus of controlling light capable of extracting sufficiently large and speedy optical responses from the photoresponsive photoelement with a high reproducibility, wherein the control light is emitted from the light source 1, and the signal light from the light source 2. The control light and signal light are converged by the converging lens 7, and illuminated to the film photoelement 8 filled in with the photoresponsive composition. Via the collimate lens 9 and the band-pass filter 20, only the signal light is detected with the photodetector 22. By turning the control light on and off, the transmittance and/or refractive index of the signal light are reversibly increased or decreased, realizing the modulation of photointencity.Type: GrantFiled: August 6, 1998Date of Patent: July 24, 2001Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Victor Company of Japan, LimitedInventors: Norio Tanaka, Shigeru Takarada, Hiromitsu Yanagimoto, Masakatsu Kai, Ichiro Ueno