And Rare Earth (i.e., Elements With Atomic Number 39 Or 57-71) Patents (Class 501/78)
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Patent number: 8575048Abstract: [Problems to be Solved] To provide a high-refractivity low-dispersion optical glass that enables the stable production of high-quality optical elements. [Means to Solve the Problems] An optical glass comprising, as essential components, 20 to 50% of B3+, 5 to 35% of La3+, 1 to 30% of Nb5+, 0.5 to 15% of Ta5+, and 11 to 40% of Zn2+, the total content of B3+ and Si4+ being 20 to 50%, the total content of La3+, Gd3+ and Y3+ being 5 to 35%, the cationic ratio of ((B3++Si4+)/(La3++Gd3++Y3+)) being from 1 to 5, the total content of Ti4+, Nb5+, Ta5+ and W6+ being 10 to 35%, the cationic ratio of ((Nb5++Ta5+)/(Ti4++Nb5++Ta5++W6+)) being from 0.7 to 1, the cationic ratio of ((B3++Si4+)/(Ti4++Nb5++Ta5++W6+)) being from 0.5 to 4, the cationic ratio of ((La3++Gd3++Y3+)/(Ti4++Nb5++Ta5++W6+)) being from 0.2 to 3, the cationic ratio of Zn2+/Zn2++Mg2++Ca2++Sr2++Ba2+) being from 0.8 to 1, the optical glass having a refractive index nd of 1.89 or more and an Abbe's number ?d of 27 to 37.Type: GrantFiled: September 29, 2010Date of Patent: November 5, 2013Assignee: Hoya CorporationInventors: Tomoaki Negishi, Yasuhiro Fujiwara
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Patent number: 8575049Abstract: An optical glass comprising, by mass %, 12 to 30% of total of B2O3 and SiO2, 55 to 80% of total of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3, 2 to 10% of ZrO2, 0 to 15% of Nb2O5, 0 to 15% of ZnO and 0% or more but less than 13% of Ta2O5, wherein the ratio of the content of Ta2O5 to the total content of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3 is 0.23 or less, the ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of B2O3 and SiO2 is from 2 to 4, the optical glass having a refractive index nd of 1.86 or more and an Abbe's number ?d of 38 or more, and a rod-shaped glass shaped material and an optical element formed of the above optical glass each.Type: GrantFiled: August 10, 2012Date of Patent: November 5, 2013Assignee: Hoya CorporationInventors: Yuta Kobayashi, Yoichi Hachitani, Yunoshin Kanayama
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Patent number: 8575047Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.Type: GrantFiled: August 13, 2012Date of Patent: November 5, 2013Assignee: Hoya CorporationInventors: Yasuhiro Fujiwara, Shuhei Mikami, Hiroki Takazawa
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Publication number: 20130288878Abstract: A high-refractivity low-dispersion optical glass that can be stably supplied and has excellent glass stability and that has coloring reduced, composed of in mass %, 5 to 32% of total of SiO2 and B2O2, 45 to 65% of total of La2O2, Gd2O2 and Y2O2, 0.5 to 10% of ZnO, 1 to 20% of total of TiO2 and Nb2O5, and optionally other components. The optical glass has a refractive index nd of 1.89 to 2.0, an Abbe's number ?d of 32 to 38 and a coloring degree ?70 of 430 nm or less.Type: ApplicationFiled: June 24, 2013Publication date: October 31, 2013Applicant: HOYA CORPORATIONInventors: Tomoaki NEGISHI, Xuelu ZOU
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Patent number: 8551904Abstract: A process for making a ceramic catalyst material includes mixing a catalyst precursor material with a mineral particulate to form a mixture; adding a binder, silicon carbide, and a parting agent to the mixture to form unfired spheroids; and heating the unfired spheroids at a temperature effective to oxidize the silicon carbide and the catalyst precursor material to form the ceramic catalyst material. In another embodiment, the process includes the addition of a catalyst metal oxide salt to an aluminosilicate hydrogel aggregate mixture. Once the mixture sets, the set mixture is heated to a temperature to effective to produce a high surface area ceramic catalyst material.Type: GrantFiled: March 16, 2011Date of Patent: October 8, 2013Assignee: Nalco CompanyInventor: Felice DiMascio
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Patent number: 8546282Abstract: A glass for a light guide fiber GA1 is used in a core of a fiber 10 of a light guide, and has a refractive index nd between 1.56 and 1.74. The glass for a light guide fiber GA1 has the following composition: (A) SiO2: 20 to 55 wt %, (B11) B2O3: 0 to 2.0 wt %, (B2) does not contain P2O5 and GeO2, (C1) (BaO+SrO+La2O3+Lu2O3+Ta2O5+Gd2O3+WO3): 39 to 46 wt %, (D1) ZnO: 4 to 16 wt %, (E) does not contain Al2O3, (F) does not contain ZrO2, (G) does not contain PbO and As2O3, (H1) (Na2O+K2O): 4 to 10 wt %, (I) Sb2O3: 0 to 0.050 wt %, and (J1) (Na2SO4+K2SO4): 0.32 to 0.78 wt %.Type: GrantFiled: April 27, 2012Date of Patent: October 1, 2013Assignees: Olympus Medical Systems Corp., Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TnoInventors: Hiroaki Kinoshita, Anne Jans Faber, Mathi Rongen, Atsushi Goto, Makoto Tanabe, Yuko Katahira
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Publication number: 20130231237Abstract: The present invention relates to an optical glass containing, in terms of % by weight on the basis of oxides, B2O3: 8 to 15%, La2O3: 27 to 40%, SiO2: 1 to 10%, ZnO: 13 to 20%, WO3: 9 to 17%, Ta2O5: 7 to 15%, ZrO2: 1 to 6%, Y2O3: 2 to 8%, and Bi2O3: 0 to 5%, in which the optical glass contains substantially no Li2O and Gd2O3, and the optical glass has a refractive index nd of 1.86 to 1.90 and an Abbe number vd of 35 to 40.Type: ApplicationFiled: February 28, 2013Publication date: September 5, 2013Applicant: ASAHI GLASS COMPANY, LIMITEDInventor: Noriyoshi KAYABA
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Publication number: 20130230692Abstract: Provided is a high refractive index glass, comprising, as a glass composition in terms of mass %, 0.1 to 60% of SiO2+Al2O3+B2O3, having a mass ratio (BaO+La2O3+Nb2O5+TiO2+ZrO2)/(SiO2+Al2O3+B2O3) of 0.1 to 50, amass ratio (MgO+CaO+SrO+BaO)/(BaO+La2O3+Nb2O5+TiO2+ZrO2) of 0 to 10, and a mass ratio (TiO2+ZrO2)/(BaO+La2O3+Nb2O5) of 0.001 to 40, and having a refractive index nd of 1.55 to 2.3.Type: ApplicationFiled: December 7, 2011Publication date: September 5, 2013Inventors: Tomoki Yanase, Takashi Murata
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Publication number: 20130210604Abstract: An optical glass having high-refractivity and low-dispersion properties and containing, by mol %, 0.1 to 40% of SiO2, 10 to 50% of B2O3, wherein the mass ratio of the content of SiO2 to the content of B2O3, SiO2/B2O3, is 1 or less, 0.5 to 22% of ZnO, 5 to 50% of La2O3, and optionally other ingredients. The optical glass has a refractive index nd of 1.86 to 1.95 and an Abbe's number vd of (2.36?nd)/0.014 or more but less than 38, and a glass transition temperature of equal to or greater than 640° C.Type: ApplicationFiled: March 18, 2013Publication date: August 15, 2013Applicant: HOYA CORPORATIONInventors: Xuelu ZOU, Yunoshin Kanayama, Tomoaki Negishi
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Patent number: 8507394Abstract: There is provided a glass composition having a devitrification temperature of 1000° C. or below, a glass transformation temperature (Tg) of 535° C. or below and a specific gravity within a range from 3 to 4. The glass composition has a refractive index (nd) within a range from 1.60 to 1.75 and an Abbe number (?d) within a range from 50 to 60.Type: GrantFiled: April 14, 2006Date of Patent: August 13, 2013Assignee: Ohara Inc.Inventor: Koji Shimizu
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Publication number: 20130190162Abstract: The invention discloses an optical glass and an optical element. The optical glass comprises 0.1 wt %-8 wt % of SiO2, 20 wt %-32 wt % of B2O3, 20 wt %-35 wt % of La2O3, 15 wt %-30 wt % of Gd2O3, 1-6 wt % of Ta2O5, 1 wt %-15 wt % of ZnO, and 0.1 wt %-2 wt % of Li2O. The optical glass claimed in the invention has a refractive index of 1.75-1.8, an Abbe number of 45-52, a transformation temperature of less than 610° C., and a wavelength of less than 390 nm at 80% transmittance. Thus the claimed optical glass meets the requirements for a modern imaging device.Type: ApplicationFiled: October 2, 2012Publication date: July 25, 2013Applicant: CDGM GLASS CO., LTD.Inventor: CDGM Glass Co., Ltd.
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Patent number: 8492298Abstract: Provided is an optical glass having homogeneous optical characteristics such that striae and devitrification hardly occur at the time of producing a gob. The optical glass includes cationic components having the following composition, provided that a total of the cationic components is 95 cat %, and has a refractive index (nd) of 1.6 or more and less than 1.7 and an Abbe number (vd) of 50 or more and 56 or less, Si4+ 3 cat % or more and 13 cat % or less B3+ 40 cat % or more and 55 cat % or less La3+ 4 cat % or more and 9 cat % or less Ca2+ 6 cat % or more and 12 cat % or less Li+ 11 cat % or more and 18 cat % or less Zn2+ 6 cat % or more and 12 cat % or less Zr4+ 1 cat % or more and 4 cat % or less provided that Si4+/B3+ is 0.05 or more and 0.3 or less, and Li+/Zn2+ is 1.3 or more and 2.0 or less.Type: GrantFiled: September 24, 2009Date of Patent: July 23, 2013Assignee: Canon Kabushiki KaishaInventors: Kiyoshi Yamamoto, Michio Endo
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Patent number: 8492299Abstract: A high-refractivity low-dispersion optical glass that can be stably supplied and has excellent glass stability and that has coloring reduced, composed of in mass %, 5 to 32% of total of SiO2 and B2O3, 45 to 65% of total of La2O3, Gd2O3 and Y2O3, 0.5 to 10% of ZnO, 1 to 20% of total of TiO2 and Nb2O5, and optionally other components. The optical glass has a refractive index nd of 1.89 to 2.0, an Abbe's number ?d of 32 to 38 and a coloring degree ?70 of 430 nm or less.Type: GrantFiled: January 26, 2012Date of Patent: July 23, 2013Assignee: Hoya CorporationInventors: Tomoaki Negishi, Xuelu Zou
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Patent number: 8486536Abstract: Disclosed is a glass material for press forming providing an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like even when the glass material contains a highly reactive component. Also disclosed are an optical element having a sufficient optical performance without surface cracks, cloudiness, scratches, and the like and a method for manufacturing the same. Specifically disclosed is a glass material for press forming which comprises a core portion composed of multicomponent optical glass and a surface glass layer covering at least a region serving as an optical functional surface of the core portion. The surface glass layer contains more than 90 mass % of SiO2, and the thickness of the layer is less than five nanometers. Also specifically disclosed is a method for manufacturing a glass optical element by heating the glass material and by press forming the softened glass material using a forming die.Type: GrantFiled: May 14, 2010Date of Patent: July 16, 2013Assignee: Hoya CorporationInventors: Xuelu Zou, Hiroshi Kouno, Kouichiroh Shiraishi
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Patent number: 8486850Abstract: The invention relates to aluminophosphate-based glasses suitable for use as a solid laser medium, which further contains SiO2 and B2O3. The laser glasses possess desirable figure of merit values for FOMTM and FOMlaser, as described herein.Type: GrantFiled: September 13, 2010Date of Patent: July 16, 2013Assignee: Schott CorporationInventors: Hong Li, Elizabeth Chase, Joe Hayden
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Publication number: 20130178354Abstract: An optical glass that is an oxide glass having a very high refractive index in spite of its low-dispersion property, having excellent glass stability and having less susceptibility to coloring.Type: ApplicationFiled: March 5, 2013Publication date: July 11, 2013Applicant: HOYA CORPORATIONInventor: HOYA CORPORATION
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Publication number: 20130172169Abstract: An optical glass, comprising, denoted as cation percentages: a content of Si4+ and B3+ (35 to 55); a combined content of La3+, Gd3+, and Y3+ (30 to 55), wherein Gd3+ is 5 to 20%; a content of Ti4+, Nb5+, Ta5+ and W6+ (7 to 20); Zr4+ (2 to 8); and Zn2+ (0 to 10); wherein a cation ratio of Zn2+ to Gd3+ is 0 to 0.80; a cation ratio of Gd3+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.65 to 2.00; a cation ratio of Ta5+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0 to 0.30; a cation ratio of Ti4+ to Ti4+, Nb5+, Ta5+, and W6+ combined is 0.30 to 0.90; and a refractive index nd is 1.890 to 1.950, and an Abbé number ?d of equal to or lower than 39.0, the Abbé number ?d satisfying a relation of ?d?(2.334-nd)/0.012 relative to nd.Type: ApplicationFiled: November 2, 2012Publication date: July 4, 2013Applicant: HOYA CORPORATIONInventor: HOYA CORPORATION
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Patent number: 8476178Abstract: An optical glass comprising, by mass %, 12 to 40% of SiO2, 15% or more but less than 42% of Nb2O5, 2% or more but less than 18% of TiO2, (provided that Nb2O5/TiO2 is over 0.6), 0.1 to 20% of Li2O, 0.1 to 15% of Na2O, and 0.1 to 25% of K2O, and having an Abbe's number ?d of 20 to 30, a ?Pg,F of 0.016 or less and a liquidus temperature of 1,200° C. or lower.Type: GrantFiled: January 22, 2009Date of Patent: July 2, 2013Assignee: Hoya CorporationInventors: Xuelu Zou, Yoshio Nojima, Hiroki Takazawa
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Patent number: 8476177Abstract: The optical glass has a refractive index nd of 1.945?nd?1.97, an Abbe number ?d of 33??d?36, and a composition with the following components in amounts expressed in % of their cations, with respect to the total number of cations in the composition: B3+, 35-46; La3+, 25-35; Ta5+, 6-14; W6+, 6-13; Zr4+, 1-7; Gd3+, 0-5; Nb5+, 0-4; Y+3, 0-4; Ba2+, 0-2; ? alkaline earth metal cations, 0-2, ? La3++Ta3++W6++Zr4++Gd3++Nb5++Y3+?50; and at least one fining agent, 0-0.3. Also a ratio of B3+ to La+3 is 1.1 to 1.6 and a ratio of B3+ to ? Si+4+B3+ is ?0.5. The glass is free of lead, arsenic, Ti4+, Th4+, Zn2+, F?, and Hf+4.Type: GrantFiled: December 2, 2010Date of Patent: July 2, 2013Assignee: Schott AGInventors: Simone Ritter, Ute Woelfel, Stefanie Hansen
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Publication number: 20130161569Abstract: Provided is a glass for electrode formation, comprising, as a glass composition in terms of mass %, 65.2 to 90% of Bi2O3, 0 to 5.4% of B2O3, and 0.1 to 34.5% of MgO+CaO+SrO+BaO+ZnO+CuO+Fe2O3+Nd2O3+CeO2+Sb2O3 (total content of MgO, CaO, SrO, BaO, ZnO, CuO, Fe2O3, Nd2O3, CeO2, and Sb2O3).Type: ApplicationFiled: July 29, 2011Publication date: June 27, 2013Inventor: Kentaro Ishihara
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Patent number: 8466075Abstract: An optical glass comprising SiO2, B2O3 and La2O3 and one or more oxides selected from the group consisting of ZrO2, Nb2O5 and Ta2O5, having a refractive index of 1.83 or over and an Abbe number of 35 or over and being free of F.Type: GrantFiled: December 16, 2008Date of Patent: June 18, 2013Assignee: Kabushiki Kaisha OharaInventor: Koji Shimizu
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Patent number: 8431504Abstract: An optical glass that is an oxide glass and comprises, by cationic %, 20 to 40% of a total of Si4+ and B3+, 15 to 40% of a total of Nb5+, Ti4+, W6+ and Zr4+, 0.2 to 20% of a total of Zn2+, Ba2+, Sr2+ and Ca2+, and 15 to 55% of a total of Li+, Na+ and K+, the cationic ratio of the content of B3+ to the total content of B3+ and Si4+ being 0.01-0.5, the cationic ratio of the content of Zr4+ to the total content of Nb5+, Ti4+, W6+ and Zr4+ being 0.05 or less, the molar ratio of the total content of Zn2+ and Ba2+ to the total content of Zn2+, Ba2+, Sr2+ and Ca2+ being 0.8-1, the optical glass having a refractive index nd of 1.815 or more and an Abbe's number ?d of 29 or less.Type: GrantFiled: July 23, 2010Date of Patent: April 30, 2013Assignee: Hoya CorporationInventor: Hiroki Takazawa
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Patent number: 8424344Abstract: An optical glass comprising, by mol %, 0.1 to 40% of SiO2, 10 to 50% of B2O3, 0 to 10% of total of Li2O, Na2O and K2O, 0 to 10% of total of MgO, CaO, SrO and BaO, 0.5 to 22% of ZnO, 5 to 50% of La2O3, 0.1 to 25% of Gd2O3, 0.1 to 20% of Y2O3, 0 to 20% of Yb2O3, 0 to 25% of ZrO2, 0 to 25% of TiO2, 0 to 20% of Nb2O5, 0 to 10% of Ta2O5, over 0.1% but not more than 20% of WO3, 0 to less than 3% of GeO2, 0 to 10% of Bi2O3, and 0 to 10% of Al2O3, the mass ratio of the content of SiO2 to the content of B2O3, SiO2/B2O3, being 1 or less, the optical glass having a refractive index nd of 1.86 to 1.95 and an Abbe's number ?d of (2.36?nd)/0.014 or more but less than 38.Type: GrantFiled: January 22, 2009Date of Patent: April 23, 2013Assignee: Hoya CorporationInventors: Xuelu Zou, Yunoshin Kanayama, Tomoaki Negishi
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Publication number: 20130090225Abstract: Provided is an optical glass which can satisfy all of the following requirements: (1) it contains no environmentally undesirable components; (2) it can easily achieve a low glass transition point; (3) it has a high refractive index and high dispersion; (4) it can easily provide a glass having a superior visible light transmittance; and (5) it has superior resistance to devitrification during preparation of a preform. The optical glass has a refractive index nd of 2.0 or more, an Abbe's number vd of 20 or less, a glass transition point of 450° C. or below, and a glass composition, in % by mass, of 70 to 90% Bi2O2, 4 to 29.9% B2O2, 0.1 to 10% Li2O+Na2O+K2O, and 0 to 2.5% SiO2+Al2O2 and is substantially free of lead component, arsenic component, F component, TeO2, and GeO2.Type: ApplicationFiled: September 12, 2011Publication date: April 11, 2013Inventors: Takahiro Matano, Fumio Sato
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Publication number: 20130090227Abstract: The technical task of the present invention is to provide a lead-free glass for semiconductor encapsulation, which is easy to automate an appearance inspection, and furthermore, has excellent refinability and encapsulatability of semiconductor devices. In the lead-free glass for semiconductor encapsulation according to the present invention, a temperature at which the viscosity of glass is 106 dPa·s is 670° C. or lower, and, as a glass composition, the content of CeO2 is from 0.01 to 6% by mass, and the content of Sb2O3 is 0.1% by mass or less.Type: ApplicationFiled: June 17, 2011Publication date: April 11, 2013Applicant: NIPPON ELECTRIC GLASS CO., LTD.Inventor: Koichi Hashimoto
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Publication number: 20130079213Abstract: An optical Glass characterized by comprising, denoted as molar percentages: B2O5—5 to 45 percent; SiO2—0 to 6 percent (excluding 6 percent); Li2O, Na2O, K2O in total—0 to 3 percent; ZnO—10 to 40 percent; La2O3. 5 to 30 percent; Gd2O3—1 to 20 percent; and ZrO2, TaO2, TiO2, Nb2O5, WO3, and Bi2O3 in total—2.5 to 20 percent. The cation ratio of the Ti4+ content relative to the total content of Zr4+, Ta5+, Ti4+, Nb5+, W6+, and Bi3+ is 0.30 or lower; in that the temperature Tp at which a viscosity of 107.2 dPa·s is exhibited is 706° C. or lower. The refractive index nd and the Abbé number v(nu)d satisfy all of the following relations (I) to (IV): 34.0?vd<40 (I); nd?1.87 (II); nd?2.245?0.01×vd (III) and nd?2.28?0.01×vd (IV).Type: ApplicationFiled: November 21, 2012Publication date: March 28, 2013Applicant: HOYA CORPORATIONInventor: HOYA CORPORATION
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Patent number: 8404606Abstract: The lead-free and arsenic-free optical glasses have a refractive index of 1.83?nd?1.95 and an Abbé number of 24??d?35, good chemical resistance, excellent crystallization stability and a composition, in wt. % based on oxide content, of SiO2, 2-8; B2O3, 15-22; La2O3, 35-42; ZnO, 10-18; TiO2, 9-15; ZrO2, 3-10; Nb2O5, 4-10; and WO3, >0.5-3. Besides containing at most 5 wt. % of each of GeO2, Ag2O and BaO and conventional fining agents, they may also contain at most in total 5 wt. % of Al2O3, MgO, CaO, SrO, P2O5 and up to at most in total 5 wt. % of the components F, Ta2O5. The glasses are preferably free of alkali metal oxides, Bi2O3, Y2O3, Gd2O3 and/or Yb2O3. Optical elements made from the optical glass are also described.Type: GrantFiled: February 24, 2010Date of Patent: March 26, 2013Assignee: Schott AGInventors: Silke Wolff, Karl Mennemann, Uwe Kolberg, Ute Woelfel, Thomas Lifka
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Publication number: 20130072372Abstract: There is provided an optical glass with a high refractive index and a low dispersion having a refractive index (nd) of not less than 1.75 and an Abbe's number (?d) of not less than 35 where the image formation characteristic is hardly affected by changes in temperature of the using environment. SiO2, B2O3 and La2O3 are contained as essential components and the ratio of the constituting components are adjusted whereby an optical glass in which a product of ? and ? where ? is an average linear expansion coefficient at ?30 to +70° C. and ? is an optical elasticity constant at the wavelength of 546.1 nm is not more than 130×10?12° C.?1×nm×cm?1×Pa?1 is able to be achieved.Type: ApplicationFiled: November 14, 2012Publication date: March 21, 2013Applicant: OHARA INC.Inventor: OHARA INC.
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Patent number: 8399371Abstract: An optical glass in includes SiO2, B2O3, Al2O3, BaO, CaO, ZnO, La2O3, Gd2O3, and Y2O3, each in a specific ratio. Further, the optical glass satisfies the following conditional expressions (1) and (2), taking the content of SiO2 as A, the content of B2O3 as B, the content in total of La2O3, Gd2O3 and Y2O3 as C, and the content in total of SiO2 and B2O3 as D. 0.35<A/B<0.70??(1) 0.80<C/D<1.0??(2) By the above constitution, a high refractive index and low dispersibility are secured and at the same time deformation temperature (and glass transition temperature) lowers. By containing Al2O3, the glass structure is stabilized and a failure in appearance such as cloudiness in press molding is difficult to occur.Type: GrantFiled: June 15, 2011Date of Patent: March 19, 2013Assignee: Fujifilm CorporationInventor: Motoaki Saito
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Patent number: 8399369Abstract: An object of the present invention is to provide optical glass having improved glass-devitrification resistance and moldability without causing reduction in refractive index, and also provide an optical element using the optical glass as a raw material. Specifically, the present invention provides an optical glass containing components of, by mol %: B2O3: over 60% through 75%; Bi2O3: 24% to 39%; La2O3: 7% or lower; Gd2O3: 7% or lower; and ZrO2: 7% or lower.Type: GrantFiled: December 22, 2010Date of Patent: March 19, 2013Assignee: Sumita Optical Glass, Inc.Inventor: Yoshinori Yamamoto
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Patent number: 8377835Abstract: The present invention relates to an optical glass containing, in terms of mass % on the basis of oxides, B2O3: 10 to 20%, SiO2: 0.5 to 12%, ZnO: 5 to 19%, Ta2O5: 2.5 to 17%, Li2O: 0.2 to 3%, ZrO2: 0.6 to 4.9%, WO3: 1 to 20%, La2O3: 25 to 50%, Gd2O3: 0 to 13%, and Y2O3: 0.2 to 20%, provided that La2O3+Gd2O3+Y2O3 is 35 to 60%, in which the optical glass does not substantially contain Nb2O5, and has a refractive index (nd) of 1.82 to 1.86, an Abbe's number (?d) of 37 to 44 and a glass transition point (Tg) of 630° C. or lower.Type: GrantFiled: May 28, 2010Date of Patent: February 19, 2013Assignee: Asahi Glass Company, LimitedInventors: Satoru Tomeno, Yuki Kondo
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Publication number: 20130040800Abstract: An optical glass having a refractive index nd of 1.70 or greater and an Abbé number of 50 or greater. Given as mole percentages, it comprises: B2O3 (20 to 80 percent), SiO2 (0 to 30 percent), Li2O (1 to 25 percent), ZnO (0 to 20 percent), La2O3 (4 to 30 percent), Gd2O3 (1 to 25 percent), Y2O3 (0 to 20 percent), ZrO2 (0 to 5 percent), MgO (0 to 25 percent), CaO (0 to 15 percent), and SrO (0 to 10 percent), with the combined quantity of the above components being 97 percent or greater. The molar ratio of {ZnO/(La2O3+Gd2O3+Y2O3)} is 0.8 or less and the molar ratio of {(CaO+SrO+BaO)/(La2O3+Gd2O3+Y2O3)} is 0.8 or less. Ta2O5 may be incorporated as an optional component, with the molar ratio {(ZrO2+Ta2O5)/(La2O3+Gd2O3+Y2O3)} being 0.4 or less.Type: ApplicationFiled: October 16, 2012Publication date: February 14, 2013Applicant: HOYA CORPORATIONInventor: HOYA CORPORATION
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Patent number: 8372768Abstract: An optical glass in which a Cr content is less than 5 ppm, or a Sm content is 3 ppm or less, with respect to a 100% basic glass composition containing 2-10% SiO2, 5-45% B2O3, 0-15% RO (R?Zn, Sr, Ca, Ba), 30-60% La2O3, 0-40% Ln2O3 (Ln=Y, Gd), and, 0-30% ZrO2+Nb2O5+Ta2O5 by weight, and an optical apparatus which is provided with an optical system having the optical glass.Type: GrantFiled: December 11, 2008Date of Patent: February 12, 2013Assignee: Olympus CorporationInventor: Naoyuki Morisada
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Patent number: 8367575Abstract: The invention provides an environment-friendly optical glass with high refractive index, low dispersion and high light transmittance. The optical glass includes 6%-17% of B2O3, 2-10% of SiO2, more than 25% but less than 45% of La2O3, 5-25% of Gd2O3, 0-3% of Nb2O5, more than 19% but less than 27% of Ta2O5, 0-16% of ZnO, 0-5% of BaO, 0-5% of CaO, 0-5% of SrO, 0-9% of ZrO2, 0-8% of Y2O3, 0-8% of Yb2O3, 0-5% of WO3, 0-2% of Li2O, Na2O and K2O, equal to 0.01% but less than 0.1% of Sb2O3 and 0-1% of SnO2 optical glass. The environment-friendly optical glass does not contain GeO2, and has refractive index of 1.85-1.90, Abbe number of 35-45, the corresponding wavelength below 440 nm when transmittance thereof reaches 80% and high transmittance.Type: GrantFiled: July 15, 2009Date of Patent: February 5, 2013Assignee: CDGM Glass Co., Ltd.Inventors: Bo Kuang, Wei Wen, Weimin Li
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Patent number: 8361916Abstract: An object of the invention is to provide an optical glass for precision press having optical properties of a high refractive index and a low dispersion property and having a low molding temperature, a high devitrification resistance, an excellent molding property, and a small specific gravity. The optical glass of the invention contains, in terms of % by mass on the basis of oxides, respective components of B2O3: 10 to 20%, SiO2: 0.5 to 12%, La2O3: 25 to 50%, Gd2O3: 0 to 20%, Y2O3: 0 to 20%, provided that La2O3+Gd2O3+Y2O3: 35 to 60%, ZnO: 5 to 20%, Li2O: 0.2 to 3%, ZrO2: 0 to 0.5%, Ta2O5: 3 to 18% and WO3: 3 to 20%, and has optical constants of a refractive index nd of 1.84 to 1.86 and an Abbe number vd of 37 to 42 and a glass transition point (Tg) of 630° C. or lower.Type: GrantFiled: June 2, 2010Date of Patent: January 29, 2013Assignee: Asahi Glass Company, LimitedInventors: Satoru Tomeno, Jun Sasai, Hiroyuki Ohkawa, Kenji Imakita, Yuki Kondo
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Patent number: 8361917Abstract: The invention relates to aluminoborosilicate-based glasses suitable for use as a solid laser medium. In particular, these aluminoborosilicate-based laser glasses exhibit broad emission bandwidths of rare earth lasing ions. Although not entirely understood, the broadening of the emission bandwidth is believed to be achieved by the presence of significant amounts of lanthanide ions in the glass matrix. In addition, because of the high values of Young's modulus, fracture toughness and hardness, the rare earth aluminoborosilicate glass system according to the invention is also suitable as transparent armor window material.Type: GrantFiled: August 5, 2010Date of Patent: January 29, 2013Assignee: Schott CorporationInventors: Hong Li, Carsten Weinhold
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Patent number: 8357624Abstract: A lens formed of a high-refractivity low-dispersion glass and free of fogging and scorching on its optical-function surface, which is obtained by precision press-molding of an optical glass having a refractive index (nd) of over 1.83, an Abbe's number (?d) of 40 or more and a glass transition temperature (Tg) of 640° C. or lower and containing no Li2O and has one form of a meniscus form, a biconcave form or a plano-concave form.Type: GrantFiled: March 23, 2007Date of Patent: January 22, 2013Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Kouichi Satou, Koichiro Shiraishi
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Publication number: 20130011607Abstract: Provided is a high refractive index glass, comprising, as a glass composition in terms of mass %, 0 to 10% of B2O2, 0.001 to 35% of SrO, 0.001 to 30% of ZrO2+TiO2, and 0 to 10% of La2O2+Nb2O5, having a mass ratio of BaO/SrO of 0 to 40 and a mass ratio of SiO2/SrO of 0.1 to 40, and having a refractive index nd of 1.55 to 2.3.Type: ApplicationFiled: May 18, 2012Publication date: January 10, 2013Inventors: Atsushi MUSHIAKE, Takashi MURATA, Tomoki YANASE
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Patent number: 8349749Abstract: An optical glass having a refractive index nd of 1.70 or greater and an Abbé number of 50 or greater. Given as mole percentages, it comprises: B2O3 (20 to 80 percent), SiO2 (0 to 30 percent), Li2O (1 to 25 percent), ZnO (0 to 20 percent), La2O3 (4 to 30 percent), Gd2O3 (1 to 25 percent), Y2O3 (0 to 20 percent), ZrO2 (0 to 5 percent), MgO (0 to 25 percent), CaO (0 to 15 percent), and SrO (0 to 10 percent), with the combined quantity of the above components being 97 percent or greater. The molar ratio of {ZnO/(La2O3+Gd2O3+Y2O3)} is 0.8 or less and the molar ratio of {(CaO+SrO+BaO)/(La2O3+Gd2O3+Y2O3)} is 0.8 or less. Ta2O5 may be incorporated as an optional component, with the molar ratio {(ZrO2+Ta2O5)/(La2O3+Gd2O3+Y2O3)} being 0.4 or less.Type: GrantFiled: September 13, 2011Date of Patent: January 8, 2013Assignee: Hoya CorporationInventor: Yasuhiro Fujiwara
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Patent number: 8338320Abstract: An optical Glass characterized by comprising, denoted as molar percentages: B2O5—5 to 45 percent; SiO2—0 to 6 percent (excluding 6 percent); Li2O, Na2O, K2O in total—0 to 3 percent; ZnO—10 to 40 percent; La2O3—5 to 30 percent; Gd2O3—1 to 20 percent; and ZrO2, TaO2, TiO2, Nb2O5, WO3, and Bi2O3 in total—2.5 to 20 percent. The cation ratio of the Ti4+ content relative to the total content of Zr4+, Ta5+, Ti4+, Nb5+, W6+, and Bi3+ is 0.30 or lower; in that the temperature Tp at which a viscosity of 107.2 dPa·s is exhibited is 706° C. or lower. The refractive index nd and the Abbé number v(nu)d satisfy all of the following relations (I) to (IV): 34.0?vd<40 (I); nd?1.87 (II); nd?2.245?0.01×vd (III) and nd?2.28?0.01×vd (IV).Type: GrantFiled: May 28, 2009Date of Patent: December 25, 2012Assignee: Hoya CorporationInventor: Yasuhiro Fujiwara
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Patent number: 8338321Abstract: An optical glass contains a substance A generating light of a wavelength ?2 when irradiated with light of a wavelength ?1 and a substance B generating light of a wavelength ?3 when irradiated with light of the wavelength ?1 when a relation between the wavelength ?1 and the wavelength ?2 and the wavelength ?3 is assumed to be ?1<?2<?3 with respect to 100% of basic glass composition containing 2-10% of SiO2, 5-45% of B2O3, and 30-60% of La2O3 or further containing 0-15% of RO(R=Zn, Sr, Ba), 0-40% of Ln2O3(Ln=Y, Gd), and 0-30% of ZrO2+Nb2O5+Ta2O5, and the substance B generates fluorescent light with the wavelength ?3 of 650 nm or more when excited at the wavelength ?1 of 550 nm or less.Type: GrantFiled: October 3, 2008Date of Patent: December 25, 2012Assignee: Olympus CorporationInventor: Naoyuki Morisada
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Publication number: 20120302424Abstract: An optical glass comprising, by mass %, 12 to 30% of total of B2O3 and SiO2, 55 to 80% of total of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3, 2 to 10% of ZrO2, 0 to 15% of Nb2O5, 0 to 15% of ZnO and 0% or more but less than 13% of Ta2O5, wherein the ratio of the content of Ta2O5 to the total content of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3 is 0.23 or less, the ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of B2O3 and SiO2 is from 2 to 4, the optical glass having a refractive index nd of 1.86 or more and an Abbe's number ?d of 38 or more, and a rod-shaped glass shaped material and an optical element formed of the above optical glass each.Type: ApplicationFiled: August 10, 2012Publication date: November 29, 2012Applicant: HOYA CORPORATIONInventors: Yuta KOBAYASHI, Yoichi Hachitani, Yunoshin Kanayama
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Patent number: 8314042Abstract: An optical glass having a refractive index nd of 1.70 or greater and an Abbé number of 50 or greater. Given as mole percentages, it comprises: B2O3 (20 to 80 percent), SiO2 (0 to 30 percent), Li2O (1 to 25 percent), ZnO (0 to 20 percent), La2O3 (4 to 30 percent), Gd2O3 (1 to 25 percent), Y2O3 (0 to 20 percent), ZrO2 (0 to 5 percent), MgO (0 to 25 percent), CaO (0 to 15 percent), and SrO (0 to 10 percent), with the combined quantity of the above components being 97 percent or greater. The molar ratio of {ZnO/(La2O3+Gd2O3+Y2O3)} is 0.8 or less and the molar ratio of {(CaO+SrO+BaO)/(La2O3+Gd2O3+Y2O3)} is 0.8 or less. Ta2O5 may be incorporated as an optional component, with the molar ratio {(ZrO2+Ta2O5)/(La2O3+Gd2O3+Y2O3)} being 0.4 or less.Type: GrantFiled: September 13, 2011Date of Patent: November 20, 2012Assignee: Hoya CorporationInventor: Yasuhiro Fujiwara
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Patent number: 8309481Abstract: An optical glass includes a substance A generating light of a wavelength ?2 when irradiated with light of a wavelength ?1 and a substance B generating light of a wavelength ?3 when irradiated with light of the wavelength ?1 in the case where the relation between the wavelength ?1, the wavelength ?2, and the wavelength ?3 is assumed to be ?1<?2<?3 with respect to a 100% of basic glass composition containing at least, 2-20% SiO2, 5-45% B2O3, and 10-29% La2O3, by weight, or with respect to a 100% of basic glass composition containing; at least, 2-20% SiO2, 5-45% B2O3, 10-29% La2O3, 0-45% RO (R=Zn, Sr, Ba), 0-10% Ln2O3 (Ln=Y, Gd), and 1-20% total of ZrO2+Nb2O5+TiO2+Ta2O5, by weight.Type: GrantFiled: October 3, 2008Date of Patent: November 13, 2012Assignee: Olympus CorporationInventor: Naoyuki Morisada
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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: 20120270719Abstract: An aspect of the present invention relates to optical glass, which is oxide glass comprising various cationic components in prescribed amounts without Pb, with a refractive index nd of 1.750 to 1.850, an Abbé number ?d of 29.0 to 40.0, and a glass transition temperature of less than 630° C.Type: ApplicationFiled: April 18, 2012Publication date: October 25, 2012Applicant: HOYA CORPORATIONInventor: Tomoaki NEGISHI
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Patent number: 8288299Abstract: The present invention relates to an optical glass with a high refractive index and good precision press moldability, and a preform for precision press molding and an optical element that are comprised of the optical glass. The present invention further relates to a method of manufacturing an optical element, a lens unit being equipped with an optical element and an image pickup device being equipped with a lens unit.Type: GrantFiled: February 3, 2010Date of Patent: October 16, 2012Assignee: Hoya CorporationInventors: Yasuhiro Fujiwara, Shuhei Mikami, Hiroki Takazawa
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Publication number: 20120245015Abstract: A fluorophosphate glass containing: P5+ in an amount of 20 to 45 cationic %; Al3+ in an amount of 15 to 35 cationic %; Ba2+ in an amount of 20 to 50 cationic %; B3+ in an amount of 0 to 5 cationic %; F? in an amount of 20 to 50 anionic %; and O2? in an amount of 50 to 80 anionic %. A molar ratio of O2?/P5+ is greater than or equal to 3.5. In addition, a molar ratio of Al3+/P5+ is less than or equal to 1. In addition, the Abrasion FA is less than or equal to 600, or the Knoop hardness number is greater than or equal to 300 MPa. Furthermore, the Abbe number (?d) of the glass is larger than or equal to 66. Moreover, a refractive index (nd) of the glass satisfies an expression (1): nd?2.0614?0.0071×?d.Type: ApplicationFiled: June 8, 2012Publication date: September 27, 2012Inventor: Mikio Ikenishi
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Patent number: 8273672Abstract: An optical glass is provided that includes a refractive index (nd) of no less than 1.75 and an Abbe number (vd) of no less than 10 as optical constants. A Bi2O3 content is no less than 10% by weight to no more than 80% by weight. The content of SiO2 is lower than the content of B2O3. The total content of SiO2+B2O3 is from no less than 1% by weight to no more than 60% by weight. The content of RO is from no less than 0.1% by weight to no more than 50% by weight. R represents one or more elements selected from the group consisting of Zn, Ba, Sr, Ca, and Mg. The optical glass has at least one of the properties of being substantially free from opacification and/or being substantially devitrified within the glass body under the conditions of a reheating testing.Type: GrantFiled: October 22, 2009Date of Patent: September 25, 2012Assignee: Ohara Inc.Inventors: Atsushi Nagaoka, Jie Fu, Michiko Ogino
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Publication number: 20120238436Abstract: Provided with the following glass components: 8 to 19.5% B2O3, 4.5 to 9% SiO2, 0 to 10% GeO2, 7 to 12.5% BaO, 0 to 14% MgO, 0 to 0.4% Li2O, 15 to 34% La2O3, 3.5 to 10% Y2O3, 8 to 13.5% TiO2, 0 to 7% ZrO2, 0 to 11% Nb2O5, and 1 to 9% WO3 by weight, wherein B2O3/SiO2 is at least 1.0, La2O3+Y2O3+ZrO2+Nb2O5+WO3 is no more than 54%, and B2O3+SiO2+GeO2+BaO+MgO+Li2O+La2O3+Y2O3+TiO2+ZrO2+Nb2O5+WO3 is at least 98%.Type: ApplicationFiled: September 15, 2010Publication date: September 20, 2012Inventor: Yoshihito Taguchi