A glass-ceramic, includes a silicate-containing glass comprising a first portion and a second portion. A plurality of crystalline precipitates comprising at least one of W and Mo. The crystalline precipitates are distributed within at least one of the first and second portions of the silicate-containing glass. The glass-ceramic comprises a difference in absorbance between the first and second portions of 0.04 optical density (OD)/mm or greater over a wavelength range of from 400 nm to 1500 nm.

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.

Provided is a Li.sub.2O—Al.sub.2O.sub.3—SiO.sub.2-based crystallized glass in which a yellowish tint due to TiO.sub.2, Fe.sub.2O.sub.3 or so on is reduced. The Li.sub.2O—Al.sub.2O.sub.3—SiO.sub.2-based crystallized glass contains, in terms of % by mass, 40 to 90% SiO.sub.2, 5 to 30% Al.sub.2O.sub.3, 1 to 10% Li.sub.2O, 0 to 20% SnO.sub.2, 1 to 20% ZrO.sub.2, 0 to 10% MgO, 0 to 10% P.sub.2O.sub.5, and 0 to below 2% TiO.sub.2.

A method of growing plants comprising determining preferential light wavelengths for promoting growth of a plant. The method further comprises constructing one or more light filtering panels arranged to filter natural sunlight or artificial light to produce filtered light comprising the preferential wavelengths. In addition, the method comprises locating one or more plants in a structure constructed at least in part from one or more of the panels. The method also comprises illuminating the structure from outside with natural sunlight or artificial light to pass through the one or more panels and produce the filtered light wherein the filtered light is directed to radiate the plants.

An X-ray and gamma-ray shielding glass, including the following components in weight-%: 10-35% SiO.sub.2; 60-70% PbO; 0-8% B.sub.2O.sub.3; 0-10% Al.sub.2O.sub.3; 0-10% Na.sub.2O; 0-10% K.sub.2O; 0-0.3% As.sub.2O.sub.3; 0-2% Sb.sub.2O.sub.3; 0-6% BaO; and 0.05-2% ZrO.sub.2.

An X-ray and gamma-ray shielding glass, including the following components in weight-%: 10-35% SiO.sub.2; 60-70% PbO; 0-8% B.sub.2O.sub.3; 0-10% Al.sub.2O.sub.3; 0-10% Na.sub.2O; 0-10% K.sub.2O; 0-0.3% As.sub.2O.sub.3; 0-2% Sb.sub.2O.sub.3; 0-6% BaO; and 0.05-2% ZrO.sub.2.

Optical glass filters are provided that include a filter glass showing an optimized transmission spectrum which has a high transmission in the wave length range of 300 to 400 nm and a very low transmission in the visible wave length range. The glass has an especially high optical quality and is excellently suitable as an optical filter for generating UV light without a proportion of visible light. The optical glass filters include the components nickel oxide and cobalt oxide.

Optical glass filters are provided that include a filter glass showing an optimized transmission spectrum which has a high transmission in the wave length range of 300 to 400 nm and a very low transmission in the visible wave length range. The glass has an especially high optical quality and is excellently suitable as an optical filter for generating UV light without a proportion of visible light. The optical glass filters include the components nickel oxide and cobalt oxide.

Multicolored glass-based articles and methods of manufacture are disclosed. The method includes forming a glass-based part and exposing a first region to radiation and a second region to radiation such that the first and second regions have different sized metallic nanoparticles, resulting in a multicolored glass article.

The present invention provides a cover glass that can be installed in an automobile so as to cover a display unit including a plurality of information areas, including a glass body that has a first surface facing the display unit side, and a second surface opposite to the first surface, and that includes a plurality of transmission areas respectively corresponding to the information areas.