Abstract: An optical glass includes La3+, Zn2+, Nb5+, and Ti4+ as a cation configuring glass. La3+, Zn2+, Nb5+, and Ti4+ which satisfy 10 cat %?La3+?20 cat %, 10 cat %?Zn2+?60 cat %, 20 cat %?Nb5+?60 cat %, and 0 cat %?Ti4+?40 cat % expressed by cation %.

Abstract: A method of analyzing the dimensions of an interior. The method comprises capturing a first image of the interior with a first camera of a mobile communication device and capturing a second image of the interior with a second camera of the mobile communication device. The method further comprises analyzing the first image and the second image by the mobile communication device and, based at least in part on the analysis of the first image and the second image, determining a three-dimensional model of the interior. The method further comprises transmitting a transaction by a radio transceiver of the mobile communication device, wherein the transaction is based on the three-dimensional model of the interior and wherein the transaction is one of an insurance claim estimate, a contractor material order, or a real-estate broker listing.

Abstract: The invention including phosphate optical glass with refractivity ranging from 1.93 to 1.95 and the Abbe number ranging from 16 to 19, with a low liquidus temperature. The phosphate optical glass, including: 5 to 25 wt % of NaPO3, 1 to 20 wt % of KPO3, 2 to 15 wt % of P2O5, 0 to 5 wt % of BaO, 0 to 10 wt % of Ba(PO3)2, more than 0 but less than 2 wt % of B2O3, 5 to 25 wt % of TiO2, 35 to 55 wt % of Nb2O5, and 0 to 5 wt % of SiO2. Refractivity of phosphate optical glass can reach 1.93 to 1.95, the Abbe number can reach 16 to 19, the liquidus temperature is below 1,120° C., the processing property during melting is good, the glass surface is unlikely to be devitrified during the processing of the glass, and can be formed easily.

Abstract: The present invention is aimed to provide a cost-effective optical glass with refractive index of 1.74-1.80 and Abbe number of 47-51 but containing no Gd2O3 and an optical element made hereof. The optical glass contains the following components according to percentage by weight: more than 2.7% but less than 10% of SiO2, 20-31% of B2O3, 38-49% of La2O3, more than 12% but less than 20% of Y2O3, more than 1% but less than 4% of ZnO, more than 0.5% but less than 3% of Nb2O5, wherein the content of ZnO is more than that of Nb2O5, 0-5% of Ta2O5, 0-5% of RO, wherein the RO is one or more of CaO, SrO and MgO, and content of ZrO2 is more than 6.7% but less than 15%. The present invention is a lanthanum borate glass containing no Gd2O3. A stable glass can be obtained by adjusting the content of La2O3, B2O3 and Y2O3.

Abstract: An optical glass including B3+, La3+ and Nb5+ as cationic components constituting the glass, wherein the optical glass satisfies the following expressions represented in cation percentages: 10 cat. %?B3+?50 cat. %; 40 cat. %?La3+?65 cat. %; 0 cat. %?Nb5+?40 cat. %; 80 cat. %?(total amount of B3++La3++Nb5+)?100 cat. %; and 0 cat. %?Si4+?10 cat. %; 0 cat. %?Ge4+?5 cat. %; 0 cat. %?Mg2+?5 cat. %; 0 cat. %?Ba2+?10 cat. %; 0 cat. %?Ca2+?10 cat. %; 0 cat. %?Sr2+?10 cat. %; 0 cat. %?Zn2+?20 cat. %; 0 cat. %?W6+?5 cat. %; 0 cat. %?Zr4+?5 cat. %; 0 cat. %?Ti4+?5 cat. %; 0 cat. %?Bi3+?5 cat. %; 0 cat. %?Ta5+?10 cat. %; 0 cat. %?(total amount of Y3++Gd3+)?20 cat. %; and 0 cat. %?(total amount of Yb3++Lu3+)?10 cat. %.

Abstract: Disclosed herein are compositions and methods for making germanium-based glass polyalkenoate cements. Also disclosed are methods for their use as bone cements for bone augmentation procedures.

Abstract: The optical glass is described that may be an oxide glass including, denoted as cation %, a total of 5 to 60% of B3+ and Si4+ (with 5 to 50% of B3+), a total of equal to or higher than 5% of Zn2+ and Mg2+, a total of 10 to 50% of La3+, Gd3+, Y3+, and Yb3+, and a total of 6 to 45% of Ti4+, Nb5+, Ta5+, W6+, and Bi3+ (a total content of Ti4+ and Ta5+ being higher than 0% and a content of W6+ being higher than 5%).

Abstract: An optical glass is provided. The optical glass is suitable for use in optical elements including lenses, prisms, light guide rods, arrays, optical fibres, gradient components and optical windows in the fields of imaging, sensor technology, microscopy, medical technology, digital projection, telecommunication, optical messaging technology/information transmission, optics/illumination in the automotive sector, for solar technology, photolithography, steppers, excimer lasers, wafers, computer chips and/or integrated circuits and electronic instruments which contain such circuits and chips. The optical glass contains the components La2O3, B2O3, GeO2, HfO2 and In2O3 and in which the following components are present in the following proportions, in % by weight on an oxide basis: SiO2O2 1-8; Sb2O3 0-<2; SiO2+B2O3 1-<20; and SiO2+B2O3+GeO2+HfO2+In2O3 15-25.

Abstract: An IR supercontinuum source for generating supercontinuum in the MIR or possibly LWIR spectral bands comprises a supercontinuum fiber formed from a heavy metal oxide host glass having low optical loss and high non-linearity over the spectral band that is stable, strong and chemically durable. The supercontinuum fiber is suitably a depressed inner clad fiber configured to support only single transverse spatial mode propagation of the pump signal and supercontinuum. The source suitably includes a tapered depressed inner clad fiber to couple the pump signal into the supercontinuum fiber. The source may be configured as an “all-fiber” source.

Abstract: A lithium-ion conductive glass-ceramic article has a crystalline component characterized by the formula MA2(XO4)3, where M represents one or more monovalent or divalent cations selected from Li, Na and Zn, A represents one or more trivalent, tetravalent or pentavalent cations selected from Al, Cr, Fe, Ga, Si, Ti, Ge, V and Nb, and X represents P cations which may be partially substituted by B cations.

Abstract: An optical glass including B3+, La3+ and Nb5+ as cationic components constituting the glass, wherein the optical glass satisfies the following expressions represented in cation percentages: 10 cat. %?B3+?50 cat. %; 40 cat. %?La3+?65 cat. %; 0 cat. %?Nb5+?40 cat. %; 80 cat. %?(total amount of B3++La3++Nb5+)?100 cat. %; and 0 cat. %?Si4+?10 cat. %; 0 cat. %?Ge4+?5 cat. %; 0 cat. %?Mg2+?5 cat. %; 0 cat. %?Ba2+?10 cat. %; 0 cat. %?Ca2+?10 cat. %; 0 cat. %?Sr2+?10 cat. %; 0 cat. %?Zn2+?20 cat. %; 0 cat. %?W6+?5 cat. %; 0 cat. %?Zr4+?5 cat. %; 0 cat. %?Ti4+?5 cat. %; 0 cat. %?Bi3+?5 cat. %; 0 cat. %?Ta5+?10 cat. %; 0 cat. %?(total amount of Y3++Gd3+)?20 cat. %; and 0 cat. %?(total amount of Yb3++Lu3+)?10 cat. %.

Abstract: An IR supercontinuum source for generating supercontinuum in the MIR or possibly LWIR spectral bands comprises a supercontinuum fiber formed from a heavy metal oxide host glass having low optical loss and high non-linearity over the spectral band that is stable, strong and chemically durable. The supercontinuum fiber is suitably a depressed inner clad fiber configured to support only single transverse spatial mode propagation of the pump signal and supercontinuum. The source suitably includes a tapered depressed inner clad fiber to couple the pump signal into the supercontinuum fiber. The source may be configured as an “all-fiber” source.

Abstract: A tellurium oxide glass that is stable, strong and chemically durable exhibits low optical loss from the UV band well into the MIR band. Unwanted absorption mechanisms in the MIR band are removed or reduced so that the glass formulation exhibits optical performance as close as possible to the theoretical limit of a tellurium oxide glass. The glass formulation only includes glass constituents that provide the intermediate, modifiers and any halides (for OH— reduction) whose inherent absorption wavelength is longer than that of Tellurium (IV) oxide. The glass formulation is substantially free of Sodium Oxide and any other passive glass constituent including hydroxyl whose inherent absorption wavelength is shorter than that of Tellurium (IV) oxide. The glass formulation preferably includes only a small residual amount of halide.

Abstract: The invention provides an optical glass for press molding 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 an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Embodiments of compositions comprising materials satisfying the general formula AM1?xM?xM?yO3+y are disclosed, along with methods of making the materials and compositions. In some embodiments, M and M? are +3 cations, at least a portion of the M cations and the M? cations are bound to oxygen in trigonal bipyramidal coordination, and the material is chromophoric. In some embodiments, the material forms a crystal structure having a hexagonal unit cell wherein edge a has a length of 3.50-3.70 ? and edge c has a length of 10-13 ?. In other embodiments, edge a has a length of 5.5-7.0 ?. In particular embodiments, M? is Mn, and Mn is bonded to oxygen with an apical Mn—O bond length of 1.80 ? to 1.95 ?. In some embodiments, the material is YIn1?xMnxO3, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.

Abstract: 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.

Abstract: The invention provides an optical glass for press molding 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 an excellent visible light transmittance; and (5) it has excellent resistance to devitrification during preparation of a preform. The optical glass for press molding has a refractive index nd of 1.925 or more, an Abbe's number ?d of 10 to 30, and a glass composition, in % by mass, of 20 to 80% Bi2O3, 10 to 30% B2O3, and 0 to 5.5% GeO2 and is substantially free of lead component, arsenic component, and F component.

Abstract: Disclosed are the use of phosphate-based glasses as a solid state laser gain medium, in particular, the invention relates to broadening the emission bandwidth of rare earth ions used as lasing ions in a phosphate-based glass composition, where the broadening of the emission bandwidth is believed to be achieved by the hybridization of the glass network.

Abstract: 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.

Abstract: A glass composition having high refractive index, softening property at low temperature and small average thermal expansion coefficient, and a member provided with the composition on a substrate, are provided. The glass composition of the present invention has a refractive index (nd) of from 1.88 to 2.20, a glass transition temperature (Tg) of from 450 to 490° C., and an average thermal expansion coefficient at temperatures from 50° C. to 300° C. (?50-300) of from 60×10?7/K to 90×10?7/K, and includes Bi2O3 in an amount of from 5 to 25% in terms of mol % on the basis of oxides.

Abstract: Methods of melt spinning to make amorphous and ceramic materials.

Abstract: 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.

Abstract: A glass composition for use as a laser medium, a method for producing the glass composition, and a laser apparatus including the glass composition are provided. The glass composition includes a host glass; a 3p component having a concentration of about 5 mole percent to about 10 mole percent; and at least one of a 6p component having a concentration of about 1 mole percent to about 5 mole percent and a 5p component having a concentration of about 1 mole percent to about 5 mole percent.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: [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.

Abstract: 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.

Abstract: Embodiments of compositions comprising materials satisfying the general formula AM1?xM?xM?yO3+y are disclosed, along with methods of making the materials and compositions. In some embodiments, M and M? are +3 cations, at least a portion of the M cations and the M? cations are bound to oxygen in trigonal bipyramidal coordination, and the material is chromophoric. In some embodiments, the material forms a crystal structure having a hexagonal unit cell wherein edge a has a length of 3.50-3.70 ? and edge c has a length of 10-13 ?. In other embodiments, edge a has a length of 5.5-7.0 ?. In particular embodiments, M? is Mn, and Mn is bonded to oxygen with an apical Mn—O bond length of 1.80 ? to 1.95 ?. In some embodiments, the material is YIn1?xMnxO3, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.

Abstract: A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number ?d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.

Abstract: The lead- and arsenic-free optical glass has a refractive index nd of 1.55?nd?1.64, an Abbe number ?d of 42??d?65, and a low transition temperature Tg?460° C., good producibility and processability, and crystallization stability. The optical glass has a composition within the following range, in wt. % based on oxide content: P2O5 40-58 ZnO 20-34 Li2O 0.5-5?? GeO2 0.1-11. The glass may also have a total content of SiO2, B2O3 and Al2O3 that is less than 9 wt. %. The glass may contain MgO, SrO, CaO and BaO, but the sum of these oxides is preferably at least 2 wt. % and at most 12 wt. %. The glass may contain at most 5 wt. % of each of La2O3, TiO2, Nb2O5, at most 2 wt. % Ta2O5 and less than 1 wt. % fluorine.

Abstract: Lead and arsenic free, and preferably gadolinium and further preferably also fluorine free, optical glasses for the application fields mapping, projection, telecommunication, optical communication engineering, mobile drive, laser technology and/or micro lens arrays have a refractive index of 1.91?nd?2.05, an Abbe number of 19??d?25 and have a low transformation temperature, namely of less than or equal to 470° C. and preferably of less than or equal to 450° C., as well as good producability and processability and crystallization stability.

Abstract: The present invention provides novel glasses, methods of formulating glasses having a reduced stress-optic coefficient at visible wavelengths under anisotropic stress, and novel optical systems comprising a such glass.

Abstract: An object of the present invention is to provide an optical glass having optical constants of a refractive index of 1.70 to 1.89 and an Abbe number of 20 to 30 and being excellent in chemical durability. The invention relates to an optical glass containing P2O5: 10 to 30, Nb2O5: 25 to 50, B2O3: 0.1 to 30, BaO: 0.1 to 2, Li2O: 0 to 10, Na2O: 0.1 to 4, K2O: 0 to 10, Bi2O3: 1 to 20, GeO2: 0 to 14, TiO2: 0.1 to 5, and WO3: 1 to 14, in terms of % by mass.

Abstract: 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.

Abstract: A zinc and bismuth containing, water-soluble glass composition comprising from 10 to 75 mole % P205, 5-50 mole % alkali metal oxide, up to 40 mole % Zn0 and up to 40 mole % Bi203.

Abstract: 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%.

Abstract: The lead-free, arsenic-free, preferably gadolinium-free and fluorine-free, optical glass has a refractive index of 1.86?nd?1.95, an Abbe number of 19?vd?24, a transformation temperature of ?595° C., preferably ?550° C., good crystallization stability, good processing properties and production properties. The optical glass is free of Na2O, frre of B2O3 and has a composition (based on oxide content in % by weight) of P2O5, 14-31; Nb2O5, 22-50; Bi2O3, 5-36; WO3, >10-25; GeO2, 0-14; Li2O, 0-6; K2O, 0-6; Cs2O, 1-7; MgO, 0-6; CaO, 0-6; SrO, 0-6; BaO, 0-6; ZnO, 0-6; TiO2, 0-4; ? alkali oxides, 2-12; ? alkaline earth oxides, 0-10; ? Nb2O5, WO3, Bi2O3?50 and fining agents, 0-2.

Abstract: The invention relates to vitreous compositions, in particular of the vitroceramic type, transparent to infrared, production and uses thereof. Said compositions comprise in mol. %: Ge 5-40, Ga<1, S+Se 40-85, Sb+As 4-40, MX 2-25, Ln 0-6, adjuncts 0-30, where M=at least one alkaline metal, selected from Rb, Cs, Na, K and Zn, X=at least one atom of chlorine, bromine or iodine, Ln=at least one rare earth and adjunct=at least one additive comprising at least one metal and/or at least one metal salt with the sum of all molar percentages of the components present in said composition being 100.

Abstract: Optical glass having a refractive index (nd) of 1.75 or greater, and an Abbe number (?d) falling within the range of 15 to 40, which is suitable for molding by precision mold press is provided. The optical glass is characterized by including B2O3+SiO2 in an amount of 10 to 70%, Bi2O3 in an amount of 5% or more and less than 25%, 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, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 520° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 550 nm, for a thickness of 10 mm.

Abstract: 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.

Abstract: An optical glass suitable for mold forming at a low temperature including, in percent by weight, 9-25 percent of P2O5, 1-20 percent of GeO2, 12-28 percent of Nb2O5, 1-7 percent of TiO2, 0-55 percent of Bi2O3, 0-38 percent of WO3, 0-3 percent of SiO2, 0-5 percent of B2O3, 0-2 percent of Al2O3, 0-5 percent of Li2O, 0-11 percent of Na2O, 0-5 percent of K2O, 0-3 percent of Ta2O5, 0-1 percent of Sb2O3, at most 13 percent of at least one R2O selected from the group consisting of Li2O, Na2O and K2O, and at most 15 percent of at least one XO selected from the group consisting of CaO, SrO, BaO and ZnO. The optical glass essentially contains no environmental and human harmful components, facilitates mass production and is stable against devitrification near its softening temperature.

Abstract: An optical glass comprises: germanium oxide (GeO2) content of 14 wt % to 21 wt %; niobium oxide (Nb2O5) content of 14 wt % to 23 wt %; bismuth oxide (Bi2O3) content of 40 wt % to 52 wt %; tungsten oxide (WO3) content of 0 wt % to 5 wt %; phosphoric acid (P2O5) content of 7 wt % to 14 wt %; potassium oxide (K2O) content of 0 wt % to 4 wt %; barium oxide (BaO) content of 0 wt % to 5 wt %; lithium oxide (Li2O) content of 0 wt % to 3 wt %; sodium oxide (Na2O) content of 0 wt % to 2 wt %; and titanium oxide (TiO2) content of 1 wt % to 5 wt %, wherein iron (Fe) content is less than 10 ppm based on the total weight of the titanium oxide.

Abstract: A glass composition suitable for reactive ion etching.

Abstract: Optical glass containing bismuth oxide having good defoamability. The Optical glass contains, as % by mass, from 10 to less than 90% of a Bi2O3 component and at least 0.1% of a TeO2 and/or SeO2 component. The optical glass is on Grade 4 to Grade 1 in “JOGIS12-1994, Method for Measuring Bubbles in Optical Glass”. By controlling the amount of RO component (R is at least one selected from a group consisting of Zn, Ba, Sr, Ca, Mg) and Rn2O component (Rn=Li, Na, K, Cs), the clarifying time may be shortened.

Abstract: 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 (?d) of 15 to 22, and a yield temperature (At) of 510° C. or less.