A glass article has a refractive index n.sub.G≥1.95 and an R-number in a range of from 0.900 to 1.050. The R-number is calculated according to the following formula:

[00001]$R=\left(n_G-1\right)\left(\frac{\ln \left[\frac{{\lambda }_G^2-{\lambda }_{\min }^2}{{\lambda }_G^2-{\lambda }_{\max }^2}.Math.\frac{{\lambda }_{\max }^2}{{\lambda }_{\min }^2}\right]}{42\ln \left[\frac{{\lambda }_B^2-{\lambda }_{\min }^2}{{\lambda }_B^2-{\lambda }_{\max }^2}.Math.\frac{{\lambda }_R^2-{\lambda }_{\max }^2}{{\lambda }_R^2-{\lambda }_{\min }^2}\right]}+\frac{1}{2.8}\right).$

λ.sub.R=656 nm, λ.sub.G=587 nm and λ.sub.B=486 nm, λ.sub.min=33 nm, and n.sub.G is a refractive index of the glass article at a wavelength of 587 nm.

A composition for a glass material comprising, on an oxide basis: one or more network formers chosen from the group of silicon dioxide (SiO.sub.2) and phosphorous pentoxide (P.sub.2O.sub.5); one or more alkali metal oxides chose from the group consisting of lithium oxide (Li2O) and sodium oxide (Na.sub.2O); 8 to 15 percent by weight zirconium oxide (ZrO.sub.2); and one transition metal oxide consisting of 9 to 45 percent by weight niobium pentoxide (Nb.sub.2O.sub.5). In an embodiment, the composition consists of: 35 to 60 percent by weight silicon dioxide (SiO.sub.2); 9.25 to 15.0 percent by weight lithium oxide (Li.sub.2O); 0.5 to 2 percent by weight sodium oxide (Na.sub.2O); 8 to 15 percent by weight zirconium oxide (ZrO.sub.2); 0 to 3.5 percent by weight phosphorous pentoxide (P.sub.2O.sub.5); and 9 to 45 percent by weight niobium pentoxide (Nb.sub.2O.sub.5). In an embodiment, the glass material is a light guide for an augmented reality device.

Provided is a chemically strengthened optical glass with improved crack resistance and high hardness, in which the refractive index and the Abbe number required for a conventional optical glass are maintained.

The chemically strengthened optical glass includes a compressive stress layer on a surface, and contains, by mass % in terms of oxide: 2.0 to 20.0% of a SiO.sub.2 component, 5.0 to 35.0% of a B.sub.2O.sub.3 component, 20.0 to 60.0% of a La.sub.2O.sub.3 component, 2.0 to 25.0% of a TiO.sub.2 component, 2.0 to 15.0% of a Nb.sub.2O.sub.5 component, and more than 0% to 10.0% of a LiO.sub.2 component, and the chemically strengthened optical glass is characterized in that an Hv change rate defined as [(Hv.sub.after−Hv.sub.before)/Hv.sub.before]×100 is equal to or greater than 3.0%.

Provided is a chemically strengthened optical glass with improved crack resistance and high hardness, in which the refractive index and the Abbe number required for a conventional optical glass are maintained.

The chemically strengthened optical glass includes a compressive stress layer on a surface, and contains, by mass % in terms of oxide: 2.0 to 20.0% of a SiO.sub.2 component, 5.0 to 35.0% of a B.sub.2O.sub.3 component, 20.0 to 60.0% of a La.sub.2O.sub.3 component, 2.0 to 25.0% of a TiO.sub.2 component, 2.0 to 15.0% of a Nb.sub.2O.sub.5 component, and more than 0% to 10.0% of a LiO.sub.2 component, and the chemically strengthened optical glass is characterized in that an Hv change rate defined as [(Hv.sub.after−Hv.sub.before)/Hv.sub.before]×100 is equal to or greater than 3.0%.

A layered structure for an organic light-emitting diode (OLED) device, the layered structure including a light-transmissive substrate and an internal extraction layer formed on one side of the light-transmissive substrate, in which the internal extraction layer includes (1) a scattering area containing scattering elements composed of solid particles and pores, the solid particles having a density that decreases as it goes away from the interface with the light-transmissive substrate, and the pores having a density that increases as it goes away from the interface with the light-transmissive substrate, and (2) a free area where no scattering elements are present, formed from the surface of the internal extraction layer, which is opposite to the interface, to a predetermined depth.

A layered structure for an organic light-emitting diode (OLED) device, the layered structure including a light-transmissive substrate and an internal extraction layer formed on one side of the light-transmissive substrate, in which the internal extraction layer includes (1) a scattering area containing scattering elements composed of solid particles and pores, the solid particles having a density that decreases as it goes away from the interface with the light-transmissive substrate, and the pores having a density that increases as it goes away from the interface with the light-transmissive substrate, and (2) a free area where no scattering elements are present, formed from the surface of the internal extraction layer, which is opposite to the interface, to a predetermined depth.

A lead-through or connecting element is provided that includes an assembly having a carrier body of a high-temperature alloy, a functional element, and an at least partially crystallized glass. The crystallized glass is between a portion of the functional element and a portion of the carrier body. The carrier body subjects the crystallized glass to a compressive stress of greater than or equal to zero, at a temperature from at least 20° C. to more than 450° C. Also provided are a method for producing a lead-through or connecting element, the use of such a lead-through or connecting element, and to a measuring device including such a lead-through or connecting element.

According to at least one embodiment a glass comprises: a refractive index N of greater than 1.65 at a wavelength λ, where λ=587.6 nm; a glass density of not more than 4.2 g/cm.sup.3; Abbe number V.sub.d greater than 30; the glass comprising greater than 0.03 wt % of rare earth oxide with an atomic number of 58 or higher.

The invention relates to a coated glass substrate or glass ceramic substrate with resistant, multi-functional surface properties, including a combination of anti-microbial, anti-reflective and anti-fingerprint properties, or a combination of anti-microbial, anti-reflective and anti-fingerprint properties where the substrate is chemically pre-stressed, or a combination of anti-microbial and anti-reflective properties where the substrate is chemically pre-stressed. The coated glass substrate or glass ceramic substrate exhibits a unique combination of functions which are permanently present and do not exert a negative effect on each other.

The invention relates to a coated glass substrate or glass ceramic substrate with resistant, multi-functional surface properties, including a combination of anti-microbial, anti-reflective and anti-fingerprint properties, or a combination of anti-microbial, anti-reflective and anti-fingerprint properties where the substrate is chemically pre-stressed, or a combination of anti-microbial and anti-reflective properties where the substrate is chemically pre-stressed. The coated glass substrate or glass ceramic substrate exhibits a unique combination of functions which are permanently present and do not exert a negative effect on each other.