And Zirconium, Titanium, Tantalum, Or Niobium Patents (Class 501/51)
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Patent number: 8110515Abstract: A glass composition that simultaneously has a low temperature coefficient of refractive index and a good light transmittance, being suitable for use in environments of intense temperature change. There is provided an optical glass containing SiO2, B2O3 and La2O3, which has a temperature coefficient (20° to 40° C.) of relative refractive index (546.07 nm) of 10.0×10?6 (° C.?1) or below. Further, there is provided an optical glass mentioned above having a temperature coefficient (20° to 40° C.) of relative refractive index (546.07 nm) of 4.6×10?6 (° C.?1) or below. Still further, there is provided an optical glass mentioned above having an internal transmittance (?;10 mm) at 400 nm of 80% or higher.Type: GrantFiled: September 8, 2006Date of Patent: February 7, 2012Assignee: Ohara, Inc.Inventor: Koji Shimizu
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Patent number: 8110513Abstract: A glass composition comprising: (A) TeO2 (50-95 mol %); (B) B2O3 (1-33 mol %); (C) ZnO (1-37 mol %); (D) Bi2O3 (1-18 mol %); (E) P2O5 (0-15 mol %); (F) R2O (0-13 mol %), where R represents at least one element selected from the group consisting of Li, Na, and K; (G) MO (0-13 mol %), where M represents at least one element selected from the group consisting of Mg, Ca, Sr, and Ba; (H) TiO2 (0-13 mol %); (I) Nb2O5 (0-10 mol %); (J) Ta2O5 (0-13 mol %); (K) L2O3 (0-11 mol %), where L represents at least one element selected from the group consisting of yttrium and lanthanoids; and (L) the total amount of P2O5, R2O, MO, TiO2, Nb2O5, Ta2O5, and L2O3 described in (E) to (K), respectively, is 0-15 mol %.Type: GrantFiled: June 24, 2008Date of Patent: February 7, 2012Assignee: Nikon CorporationInventors: Motoi Ueda, Takashi Ozawa, Kiyoaki Shinohara
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Publication number: 20120028785Abstract: The invention provides a novel optical glass which has a refractive index (nd) of 1.78 to 2.2 and an Abbe value (?d) of 16 to less than 40 and is suitable for precision mold press molding by virtue of its having a low glass transition temperature, namely, an optical glass which contains by mole in terms of oxides 25 to 60% B2O3, 2 to 45% (in total) TiO2 and Nb2O5 and 1 to 25% WO3 and has a refractive index (nd) of 1.78 to 2.2 and an Abbe value (?d) of 16 to less than 40. Further, the glass contains 5 to 35% La2O3 and 1 to 40% ZnO and has a glass transition temperature (Tg) of 700° C. or below. The optical glass is excellent in meltability, stability and devitrification resistance and has a high refractive index, high light-dispersive power and excellent precision press moldability.Type: ApplicationFiled: September 30, 2011Publication date: February 2, 2012Applicant: OHARA INC.Inventor: Jie Fu
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Patent number: 8080491Abstract: An optical glass having high refractive index and low dispersion properties. There is provided an optical glass having an Abbe number (?d) and a refractive index (nd) in a region indicated by a shape bound by connecting three points, A(53, 1.70), B(53, 1.87), and C(40, 1.87) with straight lines on an orthogonal xy-coordinate system with the x-axis designating the Abbe number and the y-axis designating the refractive index; and comprising no less than 25% and no more than 65% of a combination of a SiO2 component and a B2O3 component, no less than 20% and no more than 55% of a Ln2O3 component (Ln represents at least one species selected from the group consisting of La, Gd, Dy, Yb, and Lu), and a ratio of a La2O3 component to a Ln2O3 component being no more than 0.6, by mol % on the basis of oxides.Type: GrantFiled: October 10, 2008Date of Patent: December 20, 2011Assignee: Ohara Inc.Inventor: Jie Fu
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Patent number: 8053384Abstract: A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising no less than 5 mol % and no more than 60 mol % of a B2O3 component, and no less than 0.2 mol % and no more than 60 mol % of a TeO2 component, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (nd) of 1.80 to 2.20, and an Abbe number (?d) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.Type: GrantFiled: April 2, 2008Date of Patent: November 8, 2011Assignee: Ohara Inc.Inventor: Jie Fu
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Publication number: 20110257001Abstract: The present invention relates to an optical glass having a refractive index nd of 1.86 or higher and an Abbé number v(nu)d of 28 to 36; a preform for precision press molding and an optical element that are comprised of this glass; and a method for manufacturing the optical element.Type: ApplicationFiled: February 25, 2011Publication date: October 20, 2011Applicant: HOYA CORPORATIONInventor: Tomoaki Negishi
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Patent number: 8039408Abstract: The optical glass of the present invention has 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, 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. The present invention further relates to a preform for precision press molding comprised of this glass, an optical element comprised of this glass, and methods of manufacturing the same.Type: GrantFiled: March 28, 2007Date of Patent: October 18, 2011Assignee: Hoya CorporationInventor: Yasuhiro Fujiwara
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Patent number: 8034733Abstract: An optical glass comprises, denoted as weight percentages, SiO2-2-22%, B2O3: 3-24%, ZnO:>8% and ?30%, CaO+BaO+ZnO: 10-50%, MgO: 0-3%, La2O3+Y2O3+Gd2O3+Yb2O3: 1-33%, TiO2: 2-20%, ZrO2: 0-10%, Nb2O5: 2-32%, Li2O: 0-5%, Na2O: 0-8%, K2O: 0-10%, WO3: 0-20%. The ratio by weight of La2O3 to the combined contents of La2O3, Y2O3, Gd2O3, and Yb2O3 (La2O3/(La2O3+Y2O3+Gd2O3+Yb2O3)) falls within a range of 0.7 to 1.Type: GrantFiled: March 20, 2007Date of Patent: October 11, 2011Assignee: Hoya CorporationInventors: Yuta Kobayashi, Yoichi Hachitani
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Patent number: 7998891Abstract: Optical glass having a refractive index (nd) of 1.85 or greater, and an Abbe number (?d) falling within the range of 10 to 30, which is suited for molding by precision mold press is provided. The optical glass is characterized by including B2O3+SiO2 in an amount of 3 to 60%, Bi2O3 in an amount of 25 to 80%, RO+Rn2O in an amount of 5 to 60% (wherein R represents one or more selected from a group consisting of Zn, Ba, Sr, Ca, and Mg; and Rn represents one or more selected from a group consisting of Li, Na, K, and Cs), with each component in the range expressed in oxide-based mole percentage, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 480° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 600 nm for a thickness of 10 mm.Type: GrantFiled: April 27, 2006Date of Patent: August 16, 2011Assignee: Ohara Inc.Inventor: Jie Fu
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Publication number: 20110160032Abstract: 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: ApplicationFiled: December 22, 2010Publication date: June 30, 2011Inventor: Yoshinori Yamamoto
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Publication number: 20110136652Abstract: 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: ApplicationFiled: December 2, 2010Publication date: June 9, 2011Inventors: Simone Ritter, Ute Woelfel, Stefanie Hansen
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Patent number: 7955998Abstract: A high-refractivity optical glass which has both a low-temperature softening property suitable for precision press-molding and glass stability suitable for hot-shaping of a preform, which contains, by mass %, 13 to 30% of B2O3, 0.1 to 4% of Li2O, 17 to 35% of ZnO, 15 to 45% of La2O3, 4 to 15% of Ta2O5 exclusive of 15%, 0 to 10% of ZrO2, 0 to 10% of Nb2O5 provided that Ta2O5/(Ta2O5+ZrO2+Nb2O5)>0.3, 0 to 20% of WO3 and 0 to 1% of Sb2O3 and which has a refractive index (nd) of 1.80 to 1.84 and an Abbe's number (?d) of 40.0 to 45.0.Type: GrantFiled: March 13, 2007Date of Patent: June 7, 2011Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Yasuhiro Fujiwara
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Publication number: 20110124485Abstract: A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising 5 mol % to 60 mol % of a B2O3 component, and 0.2 mol % to 60 mol % of a TeO2 component, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (nd) of 1.80 to 2.20, and an Abbe number (?d) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.Type: ApplicationFiled: January 19, 2011Publication date: May 26, 2011Applicant: OHARA INC.Inventor: Jie FU
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Patent number: 7943540Abstract: An optical glass for precision molding having a high refractive index (nd) and a low yield temperature (At). The optical glass comprises, as glass components in wt %, 64 to 83% of Bi2O3; 4 to 17% of B2O3; 0 to 12% of GeO2 (wherein the total of B2O3 and GeO2 is 10 to 20%); 0 to 7% of La2O3; 0 to 7% of Gd2O3 (wherein the total of La2O3 and Gd2O3 is 1 to 13%); 0 to 4% of ZrO2; 0 to 5% of Ta2O5; 0 to 15% of ZnO; 0 to 2% of Sb2O3; and 0 to 1% of In2O3. The optical glass has optical constants, that is, a refractive index (nd) of 2.05 to 2.25 and an Abbe number (vd) of 15 to 22, and a yield temperature (At) of 510° C. or less.Type: GrantFiled: October 5, 2007Date of Patent: May 17, 2011Assignee: Sumita Optical Glass, Inc.Inventor: Yoshinori Yamamoto
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Publication number: 20110105294Abstract: [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: ApplicationFiled: September 29, 2010Publication date: May 5, 2011Applicant: HOYA CORPORATIONInventors: Tomoaki NEGISHI, Yasuhiro Fujiwara
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Patent number: 7932197Abstract: Provided is an optical glass having high-refractivity low-dispersion properties, having a low glass transition temperature and having the property of being softened at a low temperature so that a preform therefrom is precision press-moldable, and the optical glass comprises, as essential components, B2O3, La2O3, Gd2O3 and ZnO and has a refractive index (nd) of over 1.86, an Abbe's number (?d) of less than 35 and a glass transition temperature (Tg) of 630° C. or lower.Type: GrantFiled: October 8, 2009Date of Patent: April 26, 2011Assignee: Hoya CorporationInventor: Kazutaka Hayashi
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Patent number: 7910507Abstract: There is provided a glass ceramic material for plasma display, in which glass fine grains (A) having a softening point of 570-640° C. are in 40-70 wt %, and glass fine grains (B) having a softening point of 480-540° C. are in 30-60 wt %, the glass ceramic material for plasma display being characterized in that the glass fine grains (A) comprise 2-12 wt % of SiO2, 50-58 wt % of B2O3, 10-20 wt % of Al2O3, 0-6 wt % of ZnO, 0-2.8 wt % of Li2O, and 10-22 wt % of at least one selected from MgO, CaO, SrO and BaO and that refractive index of the glass fine grains (A) is 1.53-1.56.Type: GrantFiled: December 20, 2007Date of Patent: March 22, 2011Assignee: Central Glass Company, LimitedInventors: Kazuhiro Nishikawa, Koji Tominaga
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Publication number: 20110065564Abstract: The invention provides a novel optical glass which has a refractive index (nd) of 1.78 to 2.2 and an Abbe value (?d) of 16 to less than 40 and is suitable for precision mold press molding by virtue of its having a low glass transition temperature, namely, an optical glass which contains by mole in terms of oxides 25 to 60% B2O3, 2 to 45% (in total) TiO2 and Nb2O5 and 1 to 25% WO3 and has a refractive index (nd) of 1.78 to 2.2 and an Abbe value (?d) of 16 to less than 40. Further, the glass contains 5 to 35% La2O3 and 1 to 40% ZnO and has a glass transition temperature (Tg) of 700° C. or below. The optical glass is excellent in meltability, stability and devitrification resistance and has a high refractive index, high light-dispersive power and excellent precision press moldability.Type: ApplicationFiled: October 3, 2007Publication date: March 17, 2011Inventor: Jie Fu
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Patent number: 7855158Abstract: Provided is an optical glass comprising, denoted as molar percentages: 10 to 20 percent SiO2, 5 to 40 percent B2O3, SiO2+B2O3=15 to 50 percent, 0 to 10 percent Li2O, 12 to 36 percent ZnO, where 3×Li2O+ZnO?18 percent, 5 to 30 percent La2O3, 0 to 20 percent Gd2O3, 0 to 10 percent Y2O3, La2O3+Gd2O3=10 to 30 percent, La2O3/SIGMA(?)RE2O3=0.67 to 0.95 (where SIGMA(?)RE2O3=La2O3+Gd2O3+Y2O3+Yb2O3+Sc2O3+Lu2O3), 0.5 to 10 percent ZrO2, 1 to 15 percent Ta2O5, 1 to 20 percent WO3, Ta2O5/WO3?2.5 (molar ratio), 0 to 8 percent Nb2O5, 0 to 8 percent TiO2; and having a refractive index nd of not less than 1.87 and an Abbé number nu(v)d of not less than 35 but less then 40. A method for manufacturing a preform for precision press molding by separating a glass melt gob from a glass melt obtained by mixing, heating, and melting glass starting materials, and forming a preform in a glass melt gob cooling step, said mixing, heating, and melting of glass starting materials is conducted so as to obtain the above optical glass.Type: GrantFiled: January 24, 2008Date of Patent: December 21, 2010Assignee: Hoya CorporationInventor: Yasuhiro Fujiwara
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Publication number: 20100255979Abstract: An optical Glass characterized by comprising, denoted as molar percentages: B2O3 5 to 45 percent; Li2O 0 to 3 percent; ZnO 10 to 40 percent; La2O3 5 to 30 percent; Gd2O3 0 to 20 percent; and at least one from among TiO2, Nb2O5, WO3, and Bi2O3; in that the total content X of Ti, Nb, W, and Bi, denoted as a cation percentage, is 3 to 35 percent; in that the Abbé number v(nu)d and refractive index nd fall within the range delimited by sequentially connecting with straight lines points A, B, C, D and A in FIG. 1; and in that the glass transition temperature Tg satisfies relation (1) below: Tg[° C.]?655° C.?5×X??(1). 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 0 to 20 percent; and ZrO2, TaO2, TiO2, Nb2O5, 12.Type: ApplicationFiled: May 28, 2009Publication date: October 7, 2010Applicant: Hoya CorporationInventor: Yasuhiro Fujiwara
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Patent number: 7704904Abstract: An optical glass contains as glass ingredients, by weight: 0-8% SiO2; 34.5-46% B2O3; 2.6-6% Li2O; 21-38% ZnO; 0-40% La2O3; 0-35% Gd2O3; and 0-15% Y2O3, with the total content of La2O3+Gd2O3+Y2O3 accounting for 10-40%. The optical glass also has a predetermined index of refraction and a predetermined dispersion.Type: GrantFiled: January 22, 2008Date of Patent: April 27, 2010Assignee: Konica Minolta Opto, Inc.Inventor: Akio Oogaki
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Publication number: 20100035744Abstract: Provided is an optical glass having high-refractivity low-dispersion properties, having a low glass transition temperature and having the property of being softened at a low temperature so that a preform therefrom is precision press-moldable, and the optical glass comprises, as essential components, B2O3, La2O3, Gd2O3 and ZnO and has a refractive index (nd) of over 1.86, an Abbe's number (vd) of less than 35 and a glass transition temperature (Tg) of 630° C. or lower.Type: ApplicationFiled: October 8, 2009Publication date: February 11, 2010Applicant: HOYA CORPORATIONInventor: Kazutaka Hayashi
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Patent number: 7655585Abstract: Provided is a precision press-molding optical glass that is not easily degraded in quality by the occurrence of an altered layer such as fogging or yellowing on a surface and that comprises B2O3, ZnO, La2O3 and ZrO2 and contains, by mol %, 0 to less than 0.5% of Li2O, 20 to 50% of B2O3, 0 to 20% of SiO2, 22 to 42% of ZnO, 5 to 24% of La2O3, 0 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 10 to 24%, 0.5 to 10% of ZrO2, 0 to 15% of Ta2O5, 0 to 20% of WO3, 0 to 15% of Nb2O5, 0 to 20% of TiO2, 0 to 10% of Bi2O3, 0 to 10% of GeO2, 0 to 10% of Ga2O3, 0 to 10% of Al2O3, 0 to 10% of BaO, 0 to 10% of Y2O3 and 0 to 10% of Yb2O3, the optical glass having an Abbe's number (?d) of at least 35 but less than 40.Type: GrantFiled: August 30, 2006Date of Patent: February 2, 2010Assignee: Hoya CorporationInventor: Kazutaka Hayashi
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Patent number: 7638449Abstract: This invention provides an optical glass including, by mass %: 30 to 40% of B2O3; 2.5 to 6% of Li2O; 10 to 17% of ZnO; 12 to 22% of La2O3; 15 to 25% of Gd2O3; 0 to 5% of SiO2; 0 to 5% of Bi2O3; 0 to 15% of Al2O3; 0 to 3% of ZrO2; 0 to 5% of WO3; 0 to 5% of Ta2O5; 0 to 3% of TiO2; 0 to 5% of Y2O3; and 0 to 5% of MgO+CaO+SrO+BaO.Type: GrantFiled: August 15, 2008Date of Patent: December 29, 2009Assignee: Asahi Glass Company, LimitedInventors: Kenji Imakita, Jun Sasai, Naoki Sugimoto
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Patent number: 7638450Abstract: The lead-free, fluorine-free and arsenic-free optical glass, which is useful in mapping, projection, telecommunication, optical communication engineering, and mobile drive and laser technology, has a refractive index of 1.75?nd?1.83, an Abbe number of 34?Vd?44, and Tg?560° C. The glass is free of WO3 and TeO2and has a composition in percent by weight based on oxide content of: SiO2, 0.5-8; B2O3, 10-25; ZnO, 10-22; La2O3, 23-34; Ta2O5, >15-25; Nb2O5, 0.5-15; Al2O3, 0-2; and can include optional ingredients, e.g. alkali and/or alkaline-earth oxides. In addition, a sum of B2O3 and ZnO is 33 to 41% by weight and preferably a sum of La2O3+Ta2O5+Nb2O5+Y2O3+ZrO2 is greater than 50% by weight.Type: GrantFiled: April 27, 2006Date of Patent: December 29, 2009Assignee: Schott AGInventors: Simone Monika Ritter, Ute Woelfel, Stefanie Hansen
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Patent number: 7622409Abstract: Provided is an optical glass having high-refractivity low-dispersion properties, having a low glass transition temperature and having the property of being softened at a low temperature so that a preform therefrom is precision press-moldable, and the optical glass comprises, as essential components, B2O3, La2O3, Gd2O3 and ZnO and has a refractive index (nd) of over 1.86, an Abbe's number (vd) of less than 35 and a glass transition temperature (Tg) of 630° C. or lower.Type: GrantFiled: January 7, 2008Date of Patent: November 24, 2009Assignee: Hoya CorporationInventor: Kazutaka Hayashi
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Patent number: 7615507Abstract: An optical glass having a remarkably high refractive index and excellent stability can be give without being based on PbO, and the optical glass contains, as essential components, at least one oxide selected from La2O3, Gd2O3, Y2O3, Yb2O3, TiO2, Nb2O5 or WO3, at least one oxide selected from MgO, CaO, SrO or BaO and B2O3 and optionally containing SiO2, wherein on the basis of mass, the total content of B2O3 and SiO2 is from 1 to 25%, the ratio of (B2O3+SiO2)/(La2O3+Gd2O3+Y2O3+Yb2O3+TiO2+Nb2O5+WO3) is from 0.05 to 0.3 and the ratio of (MgO+CaO+SrO+BaO)/(La2O3+Gd2O3+Y2O3+Yb2O3+TiO2+Nb2O5+WO3) is from 0.1 to 0.4, the optical glass having a refractive index (nd) of 2.000 or more and an Abbe's number (vd) of 27 or less.Type: GrantFiled: July 10, 2006Date of Patent: November 10, 2009Assignee: Hoya CorporationInventor: Michio Endo
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Patent number: 7605099Abstract: The optical glass has an index of refraction (nd) greater than or equal to 1.70, an Abbé number (?d) greater than or equal to 35 and a density (?) less than or equal to 4.5 g/cm3. Optical elements made with this optical glass are especially desirable in optical data transfer applications, particularly in read-write devices with movable read-write heads. The glass compositions required to make optical glass with these properties are described.Type: GrantFiled: March 23, 2004Date of Patent: October 20, 2009Assignee: Schott AGInventors: Silke Wolff, Ute Woelfel, Ulrich Siepe
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Patent number: 7582580Abstract: The present invention provides an optical glass including, by mass %: 46 to 70 of B2O3; 3 to 10 of Li2O; 5 to 15 of Y2O3; 0 to 46 of SiO2: 0 to 20 of Al2O3: 0 to 40 of MgO+CaO+SrO+BaO; 0 to 30 of La2O3; and 0 to 10 of ZrO2+TiO2+Gd2O3.Type: GrantFiled: August 21, 2008Date of Patent: September 1, 2009Assignee: Asahi Glass Company, LimitedInventors: Hiroyuki Ohkawa, Jun Sasai, Naoki Sugimoto
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Patent number: 7576020Abstract: Provided is an optical glass for precision press-molding is free from degradations in product quality caused by a surface altered layer such as fogging, browning, etc., and a precision press-molding preform and an optical element provided are formed of the above glass. The optical glass is a glass which contains B2O3, La2O3 and ZnO and is used as a glass material for precision press-molding, and contains, by mol %, 20 to 60% of B2O3, 0 to 20% of SiO2, 22 to 42% of ZnO, 5 to 24% of La2O3, 0 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 10 to 24%, 0 to 10% of ZrO2, 0 to 10% of Ta2O5, 0 to 10% of WO3, 0 to 10% of Nb2O5, 0 to 10% of TiO2, 0 to 10% of Bi2O3, 0 to 10% of GeO2, 0 to 10% of Ga2O3, 0 to 10% of Al2O3, 0 to 10% of BaO, 0 to 10% of Y2O3 and 0 to 10% of Yb2O3, has an Abbe's number (?d) of 40 or more and is substantially free of lithium.Type: GrantFiled: October 11, 2005Date of Patent: August 18, 2009Assignee: Hoya CorporationInventor: Kazutaka Hayashi
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Patent number: 7572747Abstract: An optical glass consisting essentially of B2O3 in an amount of 10-40 wt %, SiO2 in an amount less than or equal to 5 wt %, ZnO in an amount less than or equal to 15 wt %, SrO in an amount less than or equal to 9 wt %, ZrO2 in an amount less than or equal to 9 wt %, La2O3 in an amount of 15 to 45 wt %, BaF2 in an amount of 1 to 10 wt %, BaO in an amount less than or equal to 5 wt %, HfO2 in an amount of 0.1 to 7.5 wt %, Gd2O3 in an amount less than or equal to 16 wt %, CaO in an amount less than or equal to 7 wt %, ZrF4 in an amount less than or equal to 5 wt %, Na2O in an amount less than or equal to 2 wt % and Y2O3 in an amount less than or equal to 16 wt %. The optical glass has a glass transition temperature in a range of 500-670° C. and a refractive index (nd) in a range of 1.60 to 2.00.Type: GrantFiled: September 26, 2008Date of Patent: August 11, 2009Assignees: Alfred University, Kyocera CorporationInventors: Alexis G. Clare, Tatsuji Furuse, Matthew Hall
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Publication number: 20090197754Abstract: Provided is an optical glass having optical constants, a refractive index (nd) of more than 1.9 and an Abbe number (?d) of not more than 38, having a small partial dispersion ratio and capable of being produced from inexpensive materials. The optical glass has a partial dispersion ratio (?g, F) of at most 0.615, and contains, as indispensable ingredients, B203, La2O3, TiO2, Nb2O5 and Ta2O5, wherein the ratio, as % by mass, of TiO2/Nb2O5 is at most 0.26 and GeO2/Nb2O5 is at most 0.38. The optical glass contains, in terms of % by mass, the following ingredients: B2O3 ??5 to 22%, La2O3 ??15 to 50%, TiO2 0.01 to 15%, Nb2O5 ??5 to 40%, and Ta2O5 ?0.1 to 25%, and SiO2 0 to 10% and/or GeO2 0 to 10% and/or Al2O3 0 to 10% and/or Gd2O3 0 to 16% and/or ZrO2 0 to 15% and/or WO3 0 to 22% and/or Sb2O3 0 to 1%.Type: ApplicationFiled: January 29, 2009Publication date: August 6, 2009Applicant: OHARA INC.Inventors: Susumu UEHARA, Kiyoyuki Momono
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Patent number: 7563736Abstract: An optical glass which has an internal transmittance to a light having a wavelength of 400 nm being at least 90% as calculated in a thickness of 1 mm and which contains at least 25 mol % of B2O3 and from 0.1 to 20 mol % of TeO2. The above optical glass which contains La2O3. The above optical glass wherein the glass transition point ?650° C. and the refractive index at 633 nm?1.70. A process for producing an optical element made of the above optical glass, which comprises dropping the optical glass in a molten state from a flow outlet of a flow out pipe made of a platinum alloy to form a preform and subjecting it to precision press-molding.Type: GrantFiled: April 26, 2006Date of Patent: July 21, 2009Assignee: Asahi Glass Company, LimitedInventors: Tomoyuki Kobayashi, Jun Sasai, Syuji Matsumoto, Naoki Sugimoto
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Patent number: 7524781Abstract: A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi2O3, from 12 to 45% of B2O3, from 1 to 20% of Ga2O3, from 1 to 20% of In2O3, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO2+Al2O3+GeO2, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO2+TeO2+TiO2+ZrO2+Ta2O3+Y2O3+WO3 and from 0 to 5% of CeO2, wherein Ga2O3+In2O3+ZnO?5%. An optical fiber comprising the above non-lead optical glass as a core.Type: GrantFiled: December 20, 2005Date of Patent: April 28, 2009Assignee: Asahi Glass Company, LimitedInventors: Tatsuo Nagashima, Naoki Sugimoto, Seiki Ohara, Tomoharu Hasegawa
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Patent number: 7514381Abstract: To provide an optical glass which has a high transmittance and a high refractive index and shows little decrease in the transmitted light intensity when continuously irradiated with a blue-violet laser diode light, and which is less prone to a higher melting temperature and exhibits chemical durability being not low. An optical glass consisting essentially of, as represented by mol %, from 35 to 54% of TeO2, from 0 to 10% of GeO2, from 5 to 30% of B2O3, from 0 to 15% of Ga2O3, from 0 to 8% of Bi2O3, from 3 to 20% of ZnO, from 0 to 10% of MgO+CaO+SrO+BaO, from 1 to 10% of Y2O3+La2O3+Gd2O3, from 0 to 5% of Ta2O5+Nb2O5, from 0 to 1.8% of TiO2, and from 0 to 6% of Li2O+Na2O+K2O+Rb2O+Cs2O. A lens made of such an optical glass.Type: GrantFiled: December 26, 2006Date of Patent: April 7, 2009Assignee: Asahi Glass Company, LimitedInventors: Syuji Matsumoto, Jun Sasai, Naoki Sugimoto
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Patent number: 7501369Abstract: An optical glass having high-refractivity and low-dispersion optical properties and having a low glass transition point so that a heat-treating furnace can be operated for a long period of time. The optical glass has a refractive index nd of at least 1.875, an Abbe's number ?d of at least 39.5 and a glass transition point Tg of 700° C. or lower, and contains at least one of La2O3, Gd2O3, Y2O3 or Yb2O3 and at least one of ZrO2, Ta2O5 or Nb2O5, with a weight ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of SiO2 and B2O3 of from 3.2 to 5 and the weight ratio of the total content of ZrO2, Ta2O5 and Nb2O5 to the total content of SiO2 and B2O3 is from 1.1 to 1.5.Type: GrantFiled: July 16, 2007Date of Patent: March 10, 2009Assignee: Hoya CorporationInventor: Kazuo Tachiwana
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Patent number: 7490485Abstract: An optical glass whose refractive index is high and whose coloring is decreased comprising, by weight %, 2 to 45% of B2O3, 0 to 30% of SiO2 provided that the content of B2O3>the content of SiO2, 10 to 50% of La2O3, 0 to 30% of TiO2, 0 to 15% of ZnO, 0 to 15% of ZrO2, 0 to 35% of Nb2O5, 0 to 35% of BaO, 0 to 5% of SrO, 0% or more but less than 8% of CaO, 0% or more but less than 13% of MgO, provided that the total content of BaO, SrO, CaO and MgO is 0 to 40%, 0 to 20% of Gd2O3, 0 to 15% of Y2O3, 0 to 18% of Ta2O5, 0% or more but less than 0.5% of WO3, 0% or more but less than 1.5% of a total of Na2O, K2O and Li2O, 0 to 10% of GeO2, 0 to 20% of Bi2O3, 0 to 10% of Yb2O3, 0 to 10% of Al2O3, 0% or more but less than 2% of Sb2O3 and 0 to 1% of SnO2.Type: GrantFiled: April 9, 2008Date of Patent: February 17, 2009Assignee: Hoya CorporationInventor: Michio Endo
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Patent number: 7491667Abstract: Provided are optical glasses having a refractive index (nd) of over 1.82 but not more than 1.86 and an Abbe's number (?d) of 30 to 39.5 and having the property of low-temperature softening that permits precision press-molding, one is an optical glass comprising B2O3, La2O5, Gd2O3 and ZnO as essential components, comprising Li2O and SiO2 as optional components, provided that the content of SiO2 is less than 2% by weight when Li2O is contained, having a refractive index (nd) of over 1.82 but not more than 1.86 and an Abbe's number (?d) of 30 to 39.5 and having a glass transition temperature (Tg) of 630° C. or lower, and the other is an optical glass comprising, by % by weight, 14 to 30% of B2O3, 10 to 40% of La2O3, 1 to 30% of Gd2O3 and 6 to 26% of ZnO as essential components, and comprising, as optional components, predetermined amounts of WO3, Ta2O5, Nb2O5, TiO2, SiO2, Li2O, Na2O, K2O, MgO, CaO, SrO, BaO, Y2O3, Yb2O3, ZrO2, Bi2O3 and Sb2O3 and having a refractive index (nd) of over 1.82 but not more than 1.Type: GrantFiled: March 17, 2005Date of Patent: February 17, 2009Assignee: Hoya CorporationInventor: Kazutaka Hayashi
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Publication number: 20090018006Abstract: A glass composition satisfying the following conditions (A) to (L), the conditions are: (A) a content ratio of TeO2 is in a range from 50 to 95 mol %; (B) a content ratio of B2O3 is in a range from 1 to 33 mol %; (C) a content ratio of ZnO is in a range from 1 to 37 mol %; (D) a content ratio of Bi2O3 is in a range from 1 to 18 mol %; (E) a content ratio of P2O5 is in a range from 0 to 15 mol %; (F) a content ratio of R2O (where R represents at least one element selected from the group consisting of Li, Na, and K) is in a range from 0 to 13 mol %; (G) a content ratio of MO (where M represents at least one element selected from the group consisting of Mg, Ca, Sr, and Ba) is in a range from 0 to 13 mol %; (H) a content ratio of TiO2 is in a range from 0 to 13 mol %; (I) a content ratio of Nb2O5 is in a range from 0 to 10 mol %; (J) a content ratio of Ta2O5 is in a range from 0 to 13 mol %; (K) a content ratio of L2O3 (where L represents at least one element selected from the group consisting of yttrium and lantType: ApplicationFiled: June 24, 2008Publication date: January 15, 2009Applicant: NIKON CORPORATIONInventors: Motoi Ueda, Takashi Ozawa, Kiyoaki Shinohara
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Publication number: 20080318758Abstract: This invention provides an optical glass including, by mass %: 30 to 40% of B2O3; 2.5 to 6% of Li2O; 10 to 17% of ZnO; 12 to 22% of La2O3; 15 to 25% of Gd2O3; 0 to 5% of SiO2; 0 to 5% of Bi2O3; 0 to 15% of Al2O3; 0 to 3% of ZrO2; 0 to 5% of WO3; 0 to 5% of Ta2O5; 0 to 3% of TiO2; 0 to 5% of Y2O3; and 0 to 5% of MgO+CaO+SrO+BaO.Type: ApplicationFiled: August 15, 2008Publication date: December 25, 2008Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Kenji IMAKITA, Jun Sasai, Naoki Sugimoto
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Patent number: 7468338Abstract: A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (?d) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa·s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (?d) of 45 to 55.Type: GrantFiled: September 21, 2007Date of Patent: December 23, 2008Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Yasuhiro Fujiwara, Zou Xuelu
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Publication number: 20080312063Abstract: The present invention provides an optical glass including, by mass %: 46 to 70 of B2O3; 3 to 10 of Li2O; 5 to 15 of Y2O3; 0 to 46 of SiO2: 0 to 20 of Al2O3: 0 to 40 of MgO+CaO+SrO+BaO; 0 to 30 of La2O3; and 0 to 10 of ZrO2+TiO2+Gd2O3.Type: ApplicationFiled: August 21, 2008Publication date: December 18, 2008Applicant: ASAHI GLASS CO., LTD.Inventors: Hiroyuki OHKAWA, Jun Sasai, Naoki Sugimoto
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Publication number: 20080207428Abstract: The present claimed invention intends to provide a responsive glass membrane for ion selective electrode glass and an ion selective electrode comprising the responsive glass membrane that produces a self-cleaning function when the ultraviolet rays are irradiated although no change is brought in a composition of a sample solution as being an object to be measured and that is low in electric resistance value and superior in responsivity under an ordinary measurement environment. The responsive glass membrane for ion selective electrode is made of the titanium-containing oxide glass that contains 20˜80 mol % of titanium dioxide and lithium oxide.Type: ApplicationFiled: February 26, 2008Publication date: August 28, 2008Inventors: Yuji Nishio, Yasukazu Iwamoto, Tadanori Hashimoto
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Publication number: 20080167172Abstract: Provided is an optical glass having high-refractivity low-dispersion properties, having a low glass transition temperature and having the property of being softened at a low temperature so that a preform therefrom is precision press-moldable, and the optical glass comprises, as essential components, B2O3, La2O3, Gd2O3 and ZnO and has a refractive index (nd) of over 1.86, an Abbe's number (vd) of less than 35 and a glass transition temperature (Tg) of 630° C. or lower.Type: ApplicationFiled: January 7, 2008Publication date: July 10, 2008Applicant: HOYA CORPORATIONInventor: Kazutaka Hayashi
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Publication number: 20080119345Abstract: A ceramic substrate composition is provided which can be co-fired with a low-melting metal and exhibits excellent dielectric characteristics at high frequencies, particularly tens of gigahertz. The ceramic substrate composition mainly contains a glass represented by aB2O3-bRe2O3-cZnO, wherein the molar ratios (a, b, and c) fall within a region defined in a ternary composition diagram by Point A (0.4, 0.595, 0.005), Point B (0.4, 0.25, 0.35), Point C (0.52, 0.01, 0.47), Point D (0.9, 0.005, 0.095), and Point E (0.9, 0.09, 0.01).Type: ApplicationFiled: December 12, 2007Publication date: May 22, 2008Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Takahiro Takada, Hirobumi Yamamoto, Keisuke Kageyama
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Patent number: 7332453Abstract: Ceramics (including glasses and glass-ceramics) comprising nitrogen, and methods of making the same.Type: GrantFiled: July 29, 2004Date of Patent: February 19, 2008Assignee: 3M Innovative Properties CompanyInventors: Anatoly Z. Rosenflanz, Berkan K. Endres, Thomas J. Anderson
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Patent number: 7314841Abstract: A ceramic composition includes a glass composition and a filler including at least one of Al2O3 and TiO2, wherein the composition of the ceramic composition includes 0.15 to 0.55 mol of a, 0.45 to 0.85 mol of b, 0.01 to 0.2 mol of an oxide RO of an alkaline earth metal element R, and 0.1 to 0.4 mol of the filler, wherein a represents a molar quantity of an oxide Ln2O3 of a rare earth element Ln, b represents a molar quantity of boron oxide B2O3, and a+b=1 mol.Type: GrantFiled: May 14, 2004Date of Patent: January 1, 2008Assignee: Murata Manufacturing Co., Ltd.Inventor: Takahiro Takada
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Patent number: 7297646Abstract: Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) REO, or (c) at least one of ZrO2 or HfO2. Embodiments of ceramics according to the present invention can be made, formed as, or converted into optical waveguides, glass beads, articles (e.g., plates), fibers, particles (e.g., abrasive particles), and thin coatings.Type: GrantFiled: September 25, 2006Date of Patent: November 20, 2007Assignee: 3M Innovative Properties CompanyInventors: Anatoly Z. Rosenflanz, Craig R. Schardt
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Publication number: 20070225148Abstract: A high-refractivity optical glass which has both a low-temperature softening property suitable for precision press-molding and glass stability suitable for hot-shaping of a preform, which contains, by mass %, 13 to 30% of B2O3, 0.1 to 4% of Li2O, 17 to 35% of ZnO, 15 to 45% of La2O3, 4 to 15% of Ta2O5 exclusive of 15%, 0 to 10% of ZrO2, 0 to 10% of Nb2O5 provided that Ta2O5/(Ta2O5+ZrO2+Nb2O5)>0.3, 0 to 20% of WO3 and 0 to 1% of Sb2O3 and which has a refractive index (nd) of 1.80 to 1.84 and an Abbe's number (vd) of 40.0 to 45.0.Type: ApplicationFiled: March 13, 2007Publication date: September 27, 2007Inventors: Kazutaka Hayashi, Yasuhiro Fujiwara
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Patent number: 7232779Abstract: Provided are optical glass exhibiting a refractive index (nd) in a range of 1.75 to 1.87, an Abbé number (?d) in a range of 80 to 45, and excellent low-temperature softening properties even when not incorporating Th2O5 as well as permitting a low production cost; a precision press molding preform and an optical element comprised of such glass; a method of manufacturing the preform; and a method of manufacturing the optical element. The optical glass comprises, in a molar percent, 30 to 45 percent of B2O3, 2 to 15 percent of SiO2, 10 to 20 percent of La2O3, 1 to 10 percent of TiO2, 10 to 30 percent of ZnO, 2 to 15 percent of Li2O, higher than 0 percent and 10 percent or less of WO3, 0 to 15 percent of Nb2O5, and 0 to 10 percent of ZrO2, wherein the total amount of the above-mentioned components is higher than 95 percent, the glass exhibits a refractive index (nd) in a range of 1.75 to 1.87, and an Abbé number (?d) in a range of 80 to 45.Type: GrantFiled: August 20, 2003Date of Patent: June 19, 2007Assignee: Hoya CorporationInventors: Yoshiko Kasuga, Xuelu Zou