Patents by Inventor Naruhito Sawanobori
Naruhito Sawanobori 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: 7141525Abstract: The present invention provides a high refractive index, high dispersion optical glass for precision molding, being free from harmful materials causing environmental problems, such as lead oxide, etc., and having a low yield temperature (At), i.e. at most 580° C., a refractive index (nd) of at least 1.89 and an Abbe number (?d) of at most 23.0 and further providing a low softening property as well as an improved mass production property with less coloration, which is represented in terms of for making up the glass, by the following chemical composition (wt %): P2O5 3 to 20% B2O3 0 to 5% GeO2 more than 14 to 37% Sum of P2O5 + B2O3 + GeO2 24 to 43% Li2O 0 to 5% Na2O 0 to 8% K2O 0 to 10% Sum of Li2O + Na2O + K2O 1 to 10% Nb2O5 0 to 50% Bi2O3 12 to 67% BaO 0 to 5% WO3 0 to 12%.Type: GrantFiled: November 4, 2004Date of Patent: November 28, 2006Assignee: Sumita Optical Glass, Inc.Inventors: Yoshinori Yamamoto, Koichi Tsuchiya, Naruhito Sawanobori, Shinobu Nagahama
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Publication number: 20060261364Abstract: A method for manufacturing a solid element device, which comprises providing a glass-containing Al2O3 substrate (3) having a GaN based LED element (2) placed thereon, setting a P2O5—ZnO based low melting point glass in parallel with the substrate, and carrying out a press working at a temperature of 415° C. or higher under a pressure of 60 kgf in a nitrogen atmosphere. Under these conditions, the low melting point glass has a viscosity of 109 poise, and is adhered via an oxide formed on the surface of the glass-containing Al2O3 substrate (3). A solid element device manufactured by the above method can be manufactured through a glass sealing working at a low temperature and also has a highly reliable sealing structure.Type: ApplicationFiled: March 10, 2004Publication date: November 23, 2006Inventors: Yoshinobu Suehiro, Mitsuhiro Inoue, Hideaki Kato, Kunihiro Hadame, Ryoichi Tohmon, Satoshi Wada, Koichi Ota, Kazuya Aida, Hiroki Watanabe, Yoshinori Yamamoto, Masaaki Ohtsuka, Naruhito Sawanobori
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Publication number: 20060049421Abstract: A solid-state optical device having: a solid-state element; a power supplying/retrieving portion that supplies or retrieves electric power to/from the solid-state element; and a glass sealing material that seals the solid-state element. The glass sealing material is made of a P2O5—ZnO-based low-melting glass that has 45 to 50 wt % of P2O5 and 15 to 35 wt % of ZnO.Type: ApplicationFiled: September 8, 2005Publication date: March 9, 2006Applicants: Toyoda Gosei Co., Ltd., Sumita Optical Glass, Inc.Inventors: Yoshinobu Suehiro, Seiji Yamaguchi, Naruhito Sawanobori, Masaaki Ohtsuka, Hiroki Watanabe, Kazuya Aida
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Publication number: 20050192174Abstract: The present invention provides a high refractive index, high dispersion optical glass for precision molding, being free from harmful materials causing environmental problems, such as lead oxide, etc., and having a low yield temperature (At), i.e. at most 580° C., a refractive index (nd) of at least 1.89 and an Abbe number (?d) of at most 23.Type: ApplicationFiled: November 4, 2004Publication date: September 1, 2005Inventors: Yoshinori Yamamoto, Koichi Tsuchiya, Naruhito Sawanobori, Shinobu Nagahama
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Publication number: 20050159290Abstract: The present invention provides a high refractive index, high dispersion optical glass for precision molding, being free from harmful materials causing environmental problems, such as lead oxide, etc., and having a low yield temperature, a refractive index (nd) of at least 1.83 and an Abbe number (?d) of at most 26.Type: ApplicationFiled: November 4, 2004Publication date: July 21, 2005Inventors: Yoshinori Yamamoto, Naruhito Sawanobori, Shinobu Nagahama
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Publication number: 20040207998Abstract: A light emitting device has a light emitting element, and a phosphor layer of phosphor glass to generate fluorescence while being excited by light emitted from the light emitting element. The light emitting element emits ultraviolet light, and the phosphor glass generates visible fluorescence while being excited by the ultraviolet light.Type: ApplicationFiled: March 10, 2004Publication date: October 21, 2004Applicants: Toyoda Gosei Co., Ltd., Sumita Optical Glass Inc.Inventors: Yoshinobu Suehiro, Mitsuhiro Inoue, Hideaki Kato, Tohru Terajima, Kazuya Aida, Naruhito Sawanobori
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Patent number: 6784128Abstract: The present invention provides an optical glass for press molding, in particular, a low softening point glass which contains, in an oxide glass of phosphate type, a durability improving component in addition to glass forming components, and has a weight loss of at most 0.15 weight % in a durability test, and which is represented, in term of elements for making up the glass, by the following chemical composition (mol %): P2O5 32 to 40% Li2O 6 to 21% Na2O 8 to 31% K2O 4 to 22% Al2O3 7.4 to 16% ZnO 0 to 19.6% BaO 0 to 12% and Sum of Li2O + Na2O + K2O 35.1 to 49%.Type: GrantFiled: July 12, 2002Date of Patent: August 31, 2004Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Otsuka, Yoshinori Yamamoto, Koichi Tsuchiya, Naruhito Sawanobori, Shinobu Nagahama
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Publication number: 20040087428Abstract: The present invention provides a low softening point glass, capable of being molded at a low temperature of about 270 to 400° C. and excellent chemical durability. That is to say, the feature consists in an optical glass for molding, being excellent in chemical durability and having a transformaion temperature (Tg) of at most 350° C. and a specific gravity (Sg) of at most 3.1, which is represented, in term of elements for making up the glass, by the following chemical composition (wt % on oxide basis, calculated from the component composition): 1 P2O5 34 to 50%, Li2O 2 to 9%, Na2O 7 to 28%, K2O 3 to 27%, Sum of R2O 17 to 41% (R: Li, Na, K), Al2O3 6.Type: ApplicationFiled: August 28, 2003Publication date: May 6, 2004Inventors: Masaaki Otsuka, Naruhito Sawanobori, Shinobu Nagahama
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Publication number: 20030153450Abstract: The present invention provides an optical glass for press molding, in particular, a low softening point glass which contains, in an oxide glass of phosphate type, a durability improving component in addition to glass forming components, and has a weight loss of at most 0.15 weight % in a durability test, and which is represented, in term of elements for making up the glass, by the following chemical composition (mol %): 1 P2O5 32 to 40% Li2O 6 to 21% Na2O 8 to 31% K2O 4 to 22% Al2O3 7.4 to 16% ZnO 0 to 19.6% BaO 0 to 12% and Sum of Li2O + Na2O + K2O 35.Type: ApplicationFiled: July 12, 2002Publication date: August 14, 2003Applicant: Sumita Optical Glass, Inc.Inventors: Masaaki Otsuka, Yoshinori Yamamoto, Koichi Tsuchiya, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 6372155Abstract: The object of the present invention is to provide an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by &ggr;-rays, X-rays, UV-rays, etc. and light emission can be continued for a long time even after stopping the excitation. That is, the present invention relates to an oxide glass capable of exhibiting a long lasting afterglow and photostimulated luminescence, characterized by a constitutional composition comprising, at least, terbium oxide (Tb2O3) or manganese oxide (MnO), gallium oxide (Ga2O3) or aluminum oxide (Al2O3), alkali metal oxide or alkaline earth metal oxide and boron oxide (B2O3) or silicon oxide (SiO2) or zinc oxide (ZnO).Type: GrantFiled: November 30, 1999Date of Patent: April 16, 2002Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Yamazaki, Yoshinori Yamamoto, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 6271160Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, can be used not only as a material for confirming an infrared laser or controlling an optical axis, but also as a material for recording or reproducing of &ggr;-rays, X-rays or UV-rays images and further can be used as an optical recording material of such a type that can be read. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %): GeO2 21 to 80% ZnO 0 to 50% Ga2O2 0 to 55% (ZnO + Ga2O3 = 3 to 55%) Tb2O3 0 to 10% MnO 0 to 2% (Tb2O3 + MnO = 0.01 to 10%) R2O 0 to 45% (R: at least one atom selected from Li, Na, K and Cs) R′O 0 to 40% (R′: at least one atom selected from Mg, Ca, Sr and Ba) R2O + R′O 0.Type: GrantFiled: May 12, 1999Date of Patent: August 7, 2001Assignee: Sumita Optical Glass, Inc.Inventors: Yoshinori Yamamoto, Masaaki Yamazaki, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 6123872Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, whereby energy can be accumulated by radiation excitation, for example, by .gamma.-rays, X-rays, UV-rays, etc., light emission can be continued for a long time even after stopping the excitation. Furthermore, the long lasting afterglow and photostimulated luminescence oxide glass can be used not only as a phosphorescent material for night illumination or night signal, but also as a material for confirming an infrared laser or controlling an optical axis because of exhibiting photostimulated luminescence by irradiation of infrared rays or visible rays. In addition, this glass is useful for recording or reproducing of .gamma.-rays, X-rays or UV-rays images. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %):______________________________________ SiO.sub.2 1 to 55% B.sub.2 O.sub.3 1 to 50% (SiO.sub.2 + B.sub.2 O.Type: GrantFiled: December 16, 1998Date of Patent: September 26, 2000Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Yamazaki, Yoshinori Yamamoto, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 5961883Abstract: A glass material is provided which is capable of exhibiting fluorescence in the visible region by ultraviolet ray excitation. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %):______________________________________ SiO.sub.2 2 to 60%, B.sub.2 O.sub.3 5 to 70% (SiO.sub.2 + B.sub.2 O.sub.3 = 50 to 70%) RO 5 to 30% (R: at least one atom selected from Mg, Ca, Sr and Ba) ZnO 0 to 15% ZrO.sub.2 0 to 10%, Tb.sub.2 O.sub.3 or Eu.sub.2 O.sub.3 2 to 15% (containing either of Tb.sub.2 O.sub.3 or Eu.sub.2 O.sub.3) Ln.sub.2 O.sub.3 0 to 20% (Ln: at least one atom selected from Y, La, Gd, Yb, Lu, Sm, Dy and Tm) CeO.sub.2 0 to 1% Bi.sub.2 O.sub.3 0 to 2% Sb.sub.2 O.sub.3 0.01 to 0.5% and R'.sub.Type: GrantFiled: December 11, 1997Date of Patent: October 5, 1999Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Yamazaki, Masaaki Otsuka, Hideaki Takaku, Naruhito Sawanobori
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Patent number: 5755998Abstract: According to the present invention, there is provided a fluorophosphate fluorescent glass, capable of converting invisible ultraviolet rays into visually observable visible rays with a high efficiency and available for controlling the optical axis of a laser beam such as excimer laser, etc. The feature of this fluorescent glass consists in a fluorophosphate fluorescent glass capable of exhibiting fluorescence in the visible region, having a chemical composition comprising, at least, (I) phosphorus (P), oxygen (O) and fluorine (F), as glass constituting components, and (II) at least one member selected from the group consisting of divalent europium, terbium, samarium and manganese, as a fluorescent agent, the divalent europium being contained as an essential component and at least one of samarium and manganese being contained as an essential component when terbium is contained.Type: GrantFiled: November 20, 1996Date of Patent: May 26, 1998Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Yamazaki, Masaaki Otsuka, Shinobu Nagahama, Naruhito Sawanobori
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Patent number: 5541012Abstract: A new infrared-to-visible up-conversion material is provided which can be applied to an infrared light identification element having a useful conversion efficiency and sensitivity for infrared light in the wavelength of 1.5 .mu.m band, 0.98 .mu.m band and 0.8 .mu.m band without the necessity of previous excitation of the material. This infrared-to-visible up-conversion material consists of an inorganic material comprising at least two elements of erbium (Er) and a halogen or compounds thereof.Type: GrantFiled: October 26, 1994Date of Patent: July 30, 1996Assignees: Nippon Telegraph and Telephone Corporation, Sumita Optical Glass, Inc.Inventors: Junichi Ohwaki, Yuhu Wang, Atsushi Shibukawa, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 5439616Abstract: An infrared light-excited light-emitting substance given by the general formula:R1.sub.x R2(.sub.1-x)Ba.sub.z Cl.sub.3+2z where R1 is a rare-earth element, x satisfies the relation 0.01<x.ltoreq.1, R2 is another rare-earth element, and z satisfies the relation 1<z<4. Preferably, the substance is a transparent crystal having a transparency exceeding 70% in a wavelength range from 400 to 1500 nm, excluding wavelengths absorbed by rare-earth ions. The light-emitting substance can convert infrared light into visible light in a wavelength range from blue light to green light at a high conversion efficiency.Type: GrantFiled: August 3, 1994Date of Patent: August 8, 1995Assignee: Mitsubishi Materials CorporationInventors: Shoji Ishiwata, Etsuji Kimura, Michihiro Tanaka, Yasuhiro Hanaue, Yuhu Wang, Shinobu Nagahama, Naruhito Sawanobori
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Patent number: 5017520Abstract: A fluorophosphate optical glass having optical constants, i.e. a refractive index of 1.45 to 1.54 and an Abbe number of 75 to 90, preferably 75 to 89.5, useful as a lens for an optical instrument to obtain a good quality image, is provided, which has a chemical composition (% by mole) comprising:______________________________________ P.sub.2 O.sub.5 6.8-19.0% Al.sub.2 O.sub.3 1.5-6.0% BaO 0.3-6.6% AlF.sub.3 16.6-26.3% MgF.sub.2 2.5-19.0% CaF.sub.2 8.0-28.0% SrF.sub.2 9.7-35.0% BaF.sub.2 7.9-35.0% NaF 0.5-4.0% Gd.sub.2 O.sub.3 1.0-6.0% Y.sub.2 O.sub.3 0-3.5% La.sub.2 O.sub.3 0-3.5% Yb.sub.2 O.sub.3 0-3.5% sum of Gd.sub.2 O.sub.3, Y.sub.2 O.sub.3, La.sub.2 O.sub.3 and Yb.sub.2 O.sub.3 1.0-6.0% GdF.sub.3 0-2.0% CaO 0-3.5% SrO 0-3.5% ZnO 0-3.5% MgO 0-3.Type: GrantFiled: November 22, 1989Date of Patent: May 21, 1991Assignee: Sumita Optical Glass, Inc.Inventors: Masaaki Otsuka, Masayuki Komiya, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 4990468Abstract: A fluorophosphate optical glass having optical constants, i.e. refractive index (nd) of 1.54 to 1.60 and Abbe number (.nu.d) of 68 to 75 and having abnormal partial dispersion represented by a relative partial dispersion of at least 0.537 is provided, which has a chemical composition (% by weight) comprising:______________________________________ Al(PO.sub.3).sub.3 15-32% Ba(PO.sub.3).sub.2 0-10% Sr(PO.sub.3).sub.2 0-10% Ca(PO.sub.3).sub.2 0-10% Mg(PO.sub.3).sub.2 0-10% sum of metaphosphates 20-32% BaF.sub.2 20-70% SrF.sub.2 5-40% CaF.sub.2 0-15% MgF.sub.2 0-10% AlF.sub.3 0-5% GdF.sub.3 0-5% sum of fluorides 55-75% Gd.sub.2 O.sub.3 5-22% La.sub.2 O.sub.3 0-7% Y.sub.2 O.sub.3 0-10% Yb.sub.2 O.sub.Type: GrantFiled: September 29, 1989Date of Patent: February 5, 1991Assignee: Sumita Optical Glass, Inc.Inventors: Masayuki Komiya, Masaaki Otsuka, Naruhito Sawanobori, Shinobu Nagahama
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Patent number: 4808556Abstract: A fluorophosphate optical glass with a low refractive index and low dispersion is provided in stable manner, which has a refractive index nd of 1.42 to 1.47 and an Abbe number .nu.d of 90 to 97 and comprises 3 to 8 mole % of P.sub.2 O.sub.5, 0.1 to 2 mole % of Al.sub.2 O.sub.3, 1 to 7 mole % of BaO, 35.5 to 41 mole % of AlF.sub.3, 8 to 13 mole % of MgF.sub.2, 16 to 26 mole % of CaF.sub.2, 15 to 21 mole % of SrF.sub.2, 3.5 to 10 mole % of BaF.sub.2 and 1 to 6 mole % of NaF.Type: GrantFiled: November 3, 1987Date of Patent: February 28, 1989Assignee: Sumita Optical Glass Mfg. Co., Ltd.Inventors: Naruhito Sawanobori, Shinobu Nagahama, Nobuyoshi Baba