Patents by Inventor Hidekazu Hashima
Hidekazu Hashima 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: 8404604Abstract: A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number ?d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.Type: GrantFiled: February 9, 2009Date of Patent: March 26, 2013Assignees: Nihon Yamamura Glass Co., Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Yoshitaka Mayumi, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Patent number: 8298974Abstract: An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.Type: GrantFiled: September 25, 2009Date of Patent: October 30, 2012Assignees: Nihon Yamamura Glass Co, Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Takuro Ikeda, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20110172078Abstract: An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.Type: ApplicationFiled: September 25, 2009Publication date: July 14, 2011Inventors: Tatsuo Hidaka, Junichi Nakamura, Takuro Ikeda, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20100317504Abstract: A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number ?d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.Type: ApplicationFiled: February 9, 2009Publication date: December 16, 2010Applicant: National Institute of Advanced Industrial Sciences and TechnologyInventors: Tatsuo Hidaka, Junichi Nakamura, Yoshitaka Mayumi, Hidekazu Hashima, Kohei Fukumi, Naoyuki Kitamura, Junji Nishii
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Publication number: 20040003627Abstract: Glasses containing one or more rare-earth elements and one or more halides are disclosed including a region locally transformed into crystallized glass that comprises precipitated rare-earth element-containing halide crystals. Also disclosed are molded objects containing dispersed particles of glass containing one or more rare-earth elements and one or more halides and having a region within which the particles are transformed into crystallized glass particles. The crystallized region is invisible under usual light but can be detected using upconversion luminescence generated by irradiation with excitation laser light having a specific wavelength. Disclosed further are methods for preparing such locally crystallized glasses and molded objects, as well as methods for efficient detection of the crystallized region in such glasses or molded objects.Type: ApplicationFiled: March 31, 2003Publication date: January 8, 2004Applicant: NIHON YAMAMURA GLASS CO., LTD.Inventors: Hidekazu Hashima, Akio Konishi, Yoshinori Tanigami, Yoji Kawamoto, Noriko Tokura
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Patent number: 6380111Abstract: A novel amorphous optical device contributes to economic construction of optical computers. Since economic parallel processing of signals such as image information is made possible, the novel amorphous optical device contributes also to development of optical computers capable of performing ultra-high speed and parallel processing, object recognizing apparatuses in which image optical signals are processed by using image optical signals, motion picture extracting apparatuses used for eyes of robots and object movement monitors and optical surge absorbers. An amorphous optical device which is doped with an element having a negative optical input-output characteristic to incident light, wherein the number of ions and/or atoms of the element is 1×1026 to 2.Type: GrantFiled: September 11, 2000Date of Patent: April 30, 2002Assignees: Nihon Yamamura Glass Co., Ltd.Inventors: Yoshinobu Maeda, Akio Konishi, Hidekazu Hashima, Hajimu Wakabayashi
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Patent number: 6203860Abstract: A thin film of a perovskite-type transparent potassium niobate formed on an amorphous substrate. The thin film of a perovskite-type potassium niobate has excellent transparency, can be (110) oriented, and can be used for optical devices, such as an optical waveguide, a second harmonic generating device, and an optical switching device.Type: GrantFiled: August 4, 1998Date of Patent: March 20, 2001Assignee: Yamamura Glass Co., Ltd.Inventors: Hideki Kawai, Hidekazu Hashima, Sadao Nakajima
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Patent number: 5824419Abstract: A thin film of a perovskite-type transparent potassium niobate formed on an amorphous substrate. The thin film of a perovskite-type potassium niobate has excellent transparency, can be (110) oriented, and can be used for optical devices, such as an optical waveguide, a second harmonic generating device, and an optical switching device. The amorphous substrate is a glass substrate or a composite amorphous substrate comprising an amorphous layer which contains at least one element selected from the group consisting of alkaline earth metal elements, rare earth elements, Bi, Pb, Nb, Co, Ni, and W.Type: GrantFiled: July 29, 1996Date of Patent: October 20, 1998Assignee: Yamamura Glass Co., Ltd.Inventors: Hideki Kawai, Hidekazu Hashima, Sadao Nakajima
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Patent number: 5470506Abstract: A novel heat-generating composition comprises an electrically conductive powder, and a crystallizable glass frit which is alkaline-earth borate glass essentially containing at least one component of rare-earth metal oxides and Bi.sub.2 O.sub.3. A novel heat-generating composition comprises a molybdenum silicide as an electrically conductive powder, a glass frit, and an additive which is metal oxide powder and/or metal powder. A novel heat-generating composition comprises a combination of a molybdenum silicide and a nickel silicide as electrically conductive powder, a glass frit, and a nickel powder as an additive. The heat-generating composition is sintered in a nitrogen atmosphere or in air, to produce a heater, which has a low electrical-resistance value and a good heat-resistance.Type: GrantFiled: March 23, 1994Date of Patent: November 28, 1995Assignee: Yamamura Glass Co., Ltd.Inventors: Yoshinori Tanigami, Takahiro Tabata, Hidekazu Hashima, Akio Konishi