Abstract: Alkali free fluorophosphate-based glass system that is highly radiation resistance (for example, they remain transparent and do not solarize before, during, and after application of high energy radiation of 105 Rad or (1 kGy) or greater) and hence, reusable and further, when used with Ce provide a mechanism for determining the existence of radiation.

Abstract: A screen protector comprises a glass-based substrate and an adhesive. The glass-based substrate comprises a first major surface, a second major surface, a thickness, and an edge. The first major surface comprises a first planar portion and a peripheral portion extending outwardly from the first planar portion. The second major surface comprises a second planar portion opposite the first planar portion and is parallel to the first planar portion. The edge comprises an outer peripheral surface that intersects the peripheral portion of the first major surface. The adhesive comprises a first major surface, a second major surface, a thickness, and an edge. The first major surface of the adhesive is adhered to the second major surface of the glass-based substrate.

Abstract: Disclosed is fluorophosphate glasses for an active device, the fluorophosphate glasses including: a metaphosphate composition including Mg(PO3)2 of about 20 mol % to about 60 mol %; a fluoride composition including BaF2 of about 20 mol % to about 60 mol % and CaF2 of about 0 mol % to about 40 mol %; and dopants including rare earth elements, in which there is an effect of increasing a carrier lifetime at a metastable state energy level that is stimulated-emitted due to an efficient energy transfer phenomenon by composition optimization of dopants (e.g. Er and Yb).

Abstract: To provide a near infrared cutoff filter glass which is excellent in optical properties such that the transmittance of light in the visible range is high and the transmittance of near infrared light is low. A near infrared cutoff filter glass comprising P, F, O, Cu and Ce, wherein by cation %, from 0.1 to 15% of Cu2+ is contained, and the ratio of Cu2+ to Ce4+ (Cu2+/Ce4+) is from 3.5 to 15.

Abstract: The invention provides a glass composition with stronger bending strength and excellent transmission property in the visible range, containing the following cations with a total weight of over 90%: P5+, Al3+, B3+, R1+, R2+ and Cu2+, wherein the content of Cu2+ is 0.1-15%; the ratio of Cu2+/(P5++Al3+) is 0.01-0.15; the content of the anion O2? contained in the glass composition is up to over 97%; the bending strength of the glass composition is over 110 MPa; when the thickness of the glass composition is 0.3 mm, the spectral transmittance is more than or equal to 80% at a wavelength of 400 nm, the spectral transmittance is less than or equal to 25% at a wavelength of 700 nm, and the spectral transmittance is less than or equal to 25% at a wavelength of 1200 nm.

Abstract: A spectral luminescence standard has bismuth in a light-transmissive inorganic matrix material and emits light in the near infrared region upon irradiation with excitation light. The bismuth acts as a luminescence emitter in the near infrared region. A method includes manufacturing such a spectral luminescence standard and a calibration medium which has the spectral luminescence standard in or on a carrier material.

Abstract: The invention provides a near-infrared absorption glass, a near-infrared absorption element and a near-infrared absorption filter each with good chemical stability and transmissivity property in the visible range. When such glass is 1 mm thick, the transmissivity of such glass is more than 80% at 400 nm, and more than 85% at 500 nm. The near-infrared absorption glass comprises cations such as P5+, Al3+, Li+, R2+ and Cu2+ as well as anions such as O2? and F?, wherein the R2+ refers to Mg2+, Ca2, Sr2+ and Ba2+, and wherein the content of the said Li+ is 1-15%. Furthermore, the water resistant stability DW of the said near-infrared absorption glass is Class 1 and the acid resistant stability DA is above Class 4.

Abstract: The application relates to a semiconductor component, a photo-reflective sensor, and also a method for producing a housing for a photo-reflective sensor, wherein the housing lower part is monolithic and has at least two cavities into which an emitter and a detector are introduced.

Abstract: The invention provides a tin phosphate glass containing embedded luminescent material particles, wherein the luminescent material particles comprise luminescent material from the class of CaAlSiN 3:Eu 2+ and optionally other luminescent material particles. The invention further provides a method for the production of such glass as well as a lighting unit using such glass as (part of) a light conversion unit.

Abstract: The present application provides a glass composition comprising 10-50% by weight CaO, at least 15% and less than 50% by weight P2O5, less than 3% by weight Al2O3, less than 10% by weight Li2O, Na2O, and K2O combined, and 0-60% by weight of SrO, MgO, BaO, ZnO, or combinations thereof; dental compositions comprising the glass composition, and methods of making and using such dental compositions.

Abstract: Glass having an optimized degree of cross-linking of the phosphate component in the glass matrix is provided so that excellent weatherability is achieved. These glasses are fluorophosphate glasses that contain copper oxide as coloring component. The glasses can further contain coloring components and are obtainable in a method that includes a bubbling step.

Abstract: Provided is a low-dispersion optical glass that is formed of a fluorophosphate glass in which the molar ratio of the content of O2? to the content of P5+, O2?/P5+, is 3.5 or more and that has an Abbe's number (?d) of over 70 or has an F? content of 65 anionic % or more, and the optical glass enables the suppression of the volatilization of a glass component when an optical glass formed of a fluorophosphate glass is produced or when an obtained glass in a molten state is caused to flow out to shape it into a glass shaped material, so that the variation of properties such as a refractive index, etc., involved in the fluctuations of a glass composition and the variation of quality such as the occurrence of striae can be suppressed.

Abstract: The present invention provides a fluorophosphate glass containing more than 3 cationic % and 30 cationic % or less of a phosphorus ingredient in terms of P5+, the glass having a ratio I(1)/I(0) of equal to or less than 0.08 in which I(0) is a strength of a resonance peak generated near a reference frequency of 31P in a nuclear magnetic resonance spectrum and I(1) is a strength of a first-order side band peak of the resonance peak. The glass of the invention is reduced in volatility and erosiveness.

Abstract: The present invention provides a fluorophosphate glass containing 30 to 50 cationic % of a phosphorus ingredient in terms of P5+, the glass having, in a nuclear magnetic resonance spectrum, a resonance spectrum which is generated near a reference frequency of 31P and has a shape of Gaussian function. The glass of the invention is reduced in volatility and erosiveness.

Abstract: The present invention provide a fluorophosphate glass comprising 3 to 25 cation % of P5+, more than 30 cation % and 40 cation % or less of Al3+, 0.5 to 20 cation % of Li+ and 65 anion % or more of F? as glass ingredients, and having a liquid phase temperature of 700° C. or less. The fluorophosphate glass of the present invention has ultra low dispersibility and stability, and is preferably used for glass materials for press molding, optical element blanks and optical elements.

Abstract: Provided is a low-dispersion optical glass that is formed of a fluorophosphate glass in which the molar ratio of the content of O2? to the content of P5+, O2?/P5+, is 3.5 or more and that has an Abbe's number (?d) of over 70 or has an F? content of 65 anionic % or more, and the optical glass enables the suppression of the volatilization of a glass component when an optical glass formed of a fluorophosphate glass is produced or when an obtained glass in a molten state is caused to flow out to shape it into a glass shaped material, so that the variation of properties such as a refractive index, etc., involved in the fluctuations of a glass composition and the variation of quality such as the occurrence of striae can be suppressed.

Abstract: Coloured glasses are provided that include a following composition in percent by weight, based on oxide of: P2O5 25-75? Al2O3 0.5-15?? MgO 0-10 CaO 0-10 BaO 0-35 SrO 0-16 Li2O 0-12 Na2O 0-12 K2O 0-12 CuO 1-20 F/F2 0-20 Sum RO (R = Mg, Ca, Sr, Ba) 0-40 Sum R2O (R = Li, Na, K) 0.5-20.

Abstract: The technical problem to be solved by the invention is to provide a fluorophosphate optical glass which has low refraction, low dispersion and low density and is suitable for molding at a low temperature. The fluorophosphate optical glass has a refractive index of 1.45-1.52, an abbe number of 78-85, a transition temperature lower than 465° C., a density lower than 3.8 g/cm3, and a hardness higher than 360 (107 pa). The fluorophosphate optical glass consists of 18-25 mol % of AlF3, 5-20 mol % of Al(PO3)3, 7-12 mol % of MgF2, 15-25 mol % of CaF2, 18-25 mol % of SrF2, 8-20 mol % of BaF2, 0-8 mol % of Ba(PO3)2, 0-3 mol % of YF3 and 0-0.5 mol % of BaCl2. The fluorophosphate optical glass of the invention has the advantages of low refraction, low dispersion, low glass density, higher hardness, good processability, low tapping temperature, easy molding, and ability of effectively preventing stripes.

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: Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.

Abstract: A fluorophosphate glass having a fluorine content of 25% or more by anionic %, which is produced from a glass raw material containing 0.1 to 0.5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine, and a phosphate glass having a fluorine content of less than 25% by anionic %, which is produced from a glass raw material containing 0.1 to 5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine.

Abstract: 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. Finally, the fluorophosphate glass does not contain Cu in an amount by which Cu serves as a coloring agent.

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: Optical components that maintain transparency (remain clear) in high energy environments, including in applications of high-intensity gamma-ray radiation dosage of 1.29×109 rads and greater, and neutron energy at neutron fluxes ranging from 3×109 to 1×1014 n/cm2 sec and greater, and fluencies ranging from 2×1016 to 8.3×1020 n/cm2 and greater. Further, the optical components have a bulk laser damage threshold of 105+/?20 J/cm2, a surface laser damage threshold of 72+/?15 J/cm2, a Stokes shift of about 9%, and a fractional thermal loading of about 11%.

Abstract: New and improved compositions of doped fluorophosphate glasses for lasers have a high refractive index (nD) of approximately 1.6 to 1.7, high transmission in the near infrared part of the spectrum and a wide glass forming domain. These glass systems, Ba(PO3)2—Al(PO3)3—BaF2-Dopants, utilize dopants from the group of oxides or fluorides of the rare earth elements Sm, Eu, Nd, Er, Yb, Tm, Tb, Ho and Pr as well as MnO; and mixtures thereof. The composition of glass includes chemical durability, efficiency of laser use in the infrared spectrum and improved duration of luminescence.

Abstract: Provided is a low-dispersion optical glass that is formed of a fluorophosphate glass in which the molar ratio of the content of O2? to the content of P5+, O2?/P5+, is 3.5 or more and that has an Abbe's number (?d) of over 70 or has an F? content of 65 anionic % or more, and the optical glass enables the suppression of the volatilization of a glass component when an optical glass formed of a fluorophosphate glass is produced or when an obtained glass in a molten state is caused to flow out to shape it into a glass shaped material, so that the variation of properties such as a refractive index, etc., involved in the fluctuations of a glass composition and the variation of quality such as the occurrence of striae can be suppressed.

Abstract: New and improved compositions of doped fluorophosphate glasses for lasers have a high refractive index (nD) of approximately 1.6 to 1.7, high transmission in the near infrared part of the spectrum and a wide glass forming domain. These glass systems, Ba(PO3)2—Al(PO3)3—BaF2-Dopants, utilize dopants from the group of oxides or fluorides of the rare earth elements Sm, Eu, Nd, Er, Yb, Tm, Tb, Ho and Pr as well as MnO; and mixtures thereof. The composition of glass includes chemical durability, efficiency of laser use in the infrared spectrum and improved duration of luminescence.

Abstract: Optical components that maintain transparency (remain clear) in high energy environments, including in applications of high-intensity gamma-ray radiation dosage of 1.29×109 rads and greater, and neutron energy at neutron fluxes ranging from 3×109 to 1×1014 n/cm2 sec and greater, and fluencies ranging from 2×1016 to 8.3×1020 n/cm2 and greater. Further, the optical components have a bulk laser damage threshold of 105+/?20 J/cm2, a surface laser damage threshold of 72+/?15 J/cm2, a Stokes shift of about 9%, and a fractional thermal loading of about 11%.

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 fluorophosphate glass having a fluorine content of 25% or more by anionic %, which is produced from a glass raw material containing 0.1 to 0.5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine, and a phosphate glass having a fluorine content of less than 25% by anionic %, which is produced from a glass raw material containing 0.1 to 5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine.

Abstract: 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.

Abstract: Provided is an optically uniform and high-quality optical glass that is free from the occurrence of striae when a precision press-molding preform is produced therefrom, and that is a fluorine-containing glass having a refractive index nd(1) wherein the refractive index nd(1) and a refractive index nd(2) are substantially equivalent to each other, said refractive index nd(2) being a refractive index of the fluorine-containing glass after the fluorine-containing glass is re-melted in a nitrogen atmosphere at 900° C. for 1 hour, cooled to its glass transition temperature and then cooled to 25° C. at a temperature decrease rate of 30° C./hour.

Abstract: Glass having an optimized degree of cross-linking of the phosphate component in the glass matrix is provided so that excellent weatherability is achieved. These glasses are fluorophosphate glasses that contain copper oxide as colouring component. The glasses can further contain colouring components and are obtainable in a method that includes a bubbling step.

Abstract: 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 %; 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 larger than or equal to 3.5. In addition, a molar ratio of Al3+/P5+ is larger than or equal to 0.45. Furthermore, the Abbe number (?d) of the glass is larger than or equal to 66. Finally a refractive index (nd) of the glass satisfies an expression (1): nd?2.0614?0.0071×?d.

Abstract: A fluorophosphate glass having a fluorine content of 25% or more by anionic %, which is produced from a glass raw material containing 0.1 to 0.5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine, and a phosphate glass having a fluorine content of less than 25% by anionic %, which is produced from a glass raw material containing 0.1 to 5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine.

Abstract: In order to produce a fluorophosphate glass including P5+ at a small content in the composition thereof, the composition is adjusted so as to provide well-balanced chemical durability and thermal stability. In the production of a fluorophosphate glass in which O2?/P5+?3.7, Al3+ content is in a predetermined amount or more and P5+ content is in a predetermined amount or less, a glass raw material is prepared by using an AlF3 in which the content of Al2O3 is limited to the range from 1 to 5% by mass, and the raw material is melted to produce the fluorophosphate glass.

Abstract: Provided is an optically uniform and high-quality optical glass that is free from the occurrence of striae when a precision press-molding preform is produced therefrom, and that is a fluorine-containing glass having a refractive index nd(1) wherein the refractive index nd(1) and a refractive index nd(2) are substantially equivalent to each other, said refractive index nd(2) being a refractive index of the fluorine-containing glass after the fluorine-containing glass is re-melted in a nitrogen atmosphere at 900° C. for 1 hour, cooled to its glass transition temperature and then cooled to 25° C. at a temperature decrease rate of 30° C./hour.

Abstract: The technical problem to be solved by the invention is to provide a fluorophosphate optical glass which has low refraction, low dispersion and low density and is suitable for molding at a low temperature. The fluorophosphate optical glass has a refractive index of 1.45-1.52, an abbe number of 78-85, a transition temperature lower than 465° C., a density lower than 3.8 g/cm3, and a hardness higher than 360 (107 pa). The fluorophosphate optical glass consists of 18-25 mol % of AIF3, 5-20 mol % of Al(PO3)3, 7-12 mol % of MgF2, 15-25 mol % of CaF2, 18-25 mol % of SrF2, 8-20 mol % of BaF2, 0-8 mol % of Ba(PO3)2, 0-3 mol % of YF3 and 0-0.5 mol % of BaCl2.

Abstract: The present invention provide a fluorophosphate glass comprising 3 to 25 cation % of P5+, more than 30 cation % and 40 cation % or less of Al3+, 0.5 to 20 cation % of Li+ and 65 anion % or more of F? as glass ingredients, and having a liquid phase temperature of 700° C. or less. The fluorophosphate glass of the present invention has ultra low dispersibility and stability, and is preferably used for glass materials for press molding, optical element blanks and optical elements.

Abstract: The present invention relates to the use of lead-free and phosphate-containing glasses, preferably colored and filter glasses which absorb light in the infrared region (IR-region), in a precision molding process. Preferably, the content of fluorine in the glass is low. Advantageously, so optical constituents can be produced without finishing, such as for example lenses for digital cameras. By the use according to the present invention, also other optical constituents can be produced which can be directly used for a corresponding technical purpose. For an advantageous use, the optical constituents produced by precision molding can be used in the fields imaging, projection, telecommunications, optical communications engineering and laser technology.

Abstract: Provided is an optical glasses that has high refractivity and low dispersion and anomalous partial dispersion capability and that has excellent processability and devitrification resistance and ensures that the occurrence of striae can be inhibited, the optical glass including an optical glass having a refractive index (nd) of 1.54 to 1.60, an Abbe's number (vd) of 65 to 78, a partial dispersion ratio of 0.530 or more, a specific gravity of 4.0 or less and a viscosity, measured at its liquidus temperature, of 4 dPa·s or more and an optical glass comprising as cationic components, by cationic %, 20 to 50% of p5+, 0.1 to 20% of Al3+, 0.1 to 20% of Mg2+, 0 to 20% of Ca2+, 0 to 20% of Sr2+, 0.1 to 30% of Ba2+ and 0 to 10% of Y3+, and further comprising, as anionic components, F? and O2?, wherein the ratio of the content of Mg2+ to the content of Al3+, Mg2+/Al3+, based on cationic %, is 1.2 or less.

Abstract: New and improved compositions of doped fluorophosphate glasses for lasers have a high refractive index (nD) of approximately 1.6 to 1.7, high transmission in the near infrared part of the spectrum and a wide glass forming domain. These glass systems, Ba(PO3)2—Al(PO3)3—BaF2-Dopants, utilize dopants from the group of: oxides or fluorides of the rare earth elements: Sm, Eu, Nd, Er, Yb, Tm, Tb, Ho and Pr: as well as MnO; and mixtures thereof. The composition of glass includes chemical durability, efficiency of laser use in the infrared spectrum and improved duration of luminescence. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

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: An optical glass having a refractive index (nd) within a range from 141 to 1.47 and an Abbe number (?d) within a range from 90 to 100 comprises in mass % on element basis: P ?0.1-5.0% Al ?1.0-20.0% F 30.0-60.0% and O ?1.0-20.0% and comprises, as an essential component, one or more elements selected from the group consisting of Ca, Sr and Ba. In this optical glass, the ratio (Si+B+P+Al)/F is within a range from 0.15 to 0.40.

Abstract: Provided is a low-dispersion optical glass that is formed of a fluorophosphate glass in which the molar ratio of the content of O2? to the content of P5+, O2?/P5+, is 3.5 or more and that has an Abbe's number (?d) of over 70 or has an F? content of 65 anionic % or more, and the optical glass enables the suppression of the volatilization of a glass component when an optical glass formed of a fluorophosphate glass is produced or when an obtained glass in a molten state is caused to flow out to shape it into a glass shaped material, so that the variation of properties such as a refractive index, etc., involved in the fluctuations of a glass composition and the variation of quality such as the occurrence of striae can be suppressed.

Abstract: Di-ammonium phosphate, murate of potash and gypsum are the conventional phosphorous, potassium and sulfur fertilizers respectively. Application of gypsum to soil can cause an increase calcium load on soil and polluted surface and underground water. The most successful technique is application of phosphorous-potassium-sulfur glass which can be added directly to the soil. Main feature of the present invention is formulation and making of a composition of high phosphorous, potassium and sulfur containing glass free from alkali like Na2O, Li2O and ZnO, which are toxic to the plants. Such glasses are capable of slow release of phosphorous, potassium and sulfur required in the area of agriculture, fungicide, pesticide and weedicides etc. The present invention also emphasize optimization of nutrient content, reduction of calcium load on the soil, minimization of surface and under-ground water pollution and maintenance of acidic environment near the plant roots in the soil.

Abstract: A fluorophosphate glass having a fluorine content of 25% or more by anionic %, which is produced from a glass raw material containing 0.1 to 0.5%, by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine, and a phosphate glass having a fluorine content of less than 25% by anionic %, which is produced from a glass raw material containing 0.1 to 5% by anionic %, of a halide containing a halogen element selected from chlorine, bromine or iodine.

Abstract: New and improved compositions of doped and co-doped bismuth fluorophosphate glasses for lasers is disclosed that have a high refractive index (nD) of approximately 1.6 and higher, high transmission in the near infrared part of the spectrum, and a wide glass forming domain. The disclosed glass systems Al(PO3)3—Ba(PO3)2—Bi(PO3)3—BaF2+RFx+dopands use dopants from the group of oxides and or fluorides of rare earth elements Nd, Er, Yb, Tm, Tb, Ho, Sm, Eu and Pr as well as MnO and mixtures thereof over 100 percent (wt %) of the glass-base composition. These glasses have high chemical durability, radiation resistance, efficiency of laser use in the infrared and blue spectrum, and improved duration of luminescence.

Abstract: The present application provides dental compositions, and methods of making and using dental compositions that include a calcium and phosphorus releasing glass. Such dental compositions can be useful for delivering ions to the oral environment.

Abstract: A glass material for mold pressing, comprising a core portion comprised of an optical glass with a degree of abrasion FA of 200 or higher and a covering portion comprised of a second glass covering at least a portion of the surface of said core portion. A method for manufacturing an optical glass element, wherein a glass material that has been preformed to a prescribed shape is heat softened and press molded with a pressing mold and the outer perimeter portion of the molded product obtained is removed by mechanical processing. The above-mentioned glass material for mold pressing is used as the glass material. To provide a means whereby an optical element does not bear scratches on optically functional surfaces through contact during handling after the press molding of press molded glass products despite being comprised of a glass material with a high degree of abrasion, and a means whereby even when scratched, the function of the optical element finally obtained is unaffected.