A glass has a basic soda-lime-silica glass portion, and a colorant portion, the colorant portion including total iron as Fe.sub.2O.sub.3 in the range of at least 0.10 to no more than 2.00 weight percent, a redox ratio in the range of 0.35 to 0.6, and tin metal providing tin in an amount within the range of greater than 0.005 to 5.0 weight percent; the glass product has a tin side and an opposite air side, said tin side of the glass having a higher concentration of tin than the air side, the air side having a uniform concentration of tin from the air side of the glass product towards the tin side of the glass product.

A glass has a basic soda-lime-silica glass portion, and a colorant portion including total iron as Fe.sub.2O.sub.3 in the range of greater than zero to 0.10 weight percent, e.g. selected from the group of total iron as Fe.sub.2O.sub.3 in the range of greater than zero to 0.02 weight percent and total iron as Fe.sub.2O.sub.3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent; redox ratio in the range of 0.2 to 0.6, and tin and/or tin compounds, e.g. SnO.sub.2 greater than 0.000 to 5.0 weight percent. In one embodiment of the invention, the glass has a tin side and an opposite air side, wherein the tin side of the glass is supported on a molten tin bath during forming of the glass. The tin concentration at the tin side of the glass is greater than, less than, or equal to the tin concentration in body portion of the glass. The body portion of the glass extending from the air side of the glass toward the tin side and terminating short of the tin side of the glass.

A method of making glass having a basic soda-lime-silica glass portion, and a colorant portion, the colorant portion including total iron as Fe.sub.2O.sub.3 in the range of at least 0.00 to no more than 0.02 weight percent, a redox ratio in the range of 0.35 to 0.6, and tin metal providing tin in an amount within the range of greater than 0.005 to 5.0 weight percent; the glass product has a tin side and an opposite air side, said tin side of the glass having a higher concentration of tin than the air side, the air side having a uniform concentration of tin from the air side of the glass product towards the tin side of the glass product.

An optical glass has a refractive index (n.sub.d) of 1.64 or more. A P value represented by the following formula (1) is in a range of 7.0<P value<10.0: P value=log(A.sub.450P.sub.450+A.sub.550P.sub.550+A.sub.650P.sub.650+A.sub.750P.sub.750) (1) A.sub.450, A.sub.550, A.sub.650 and A.sub.750 are absorbances of the optical glass with a plate thickness of 10 mm at a wavelength of 450 nm, 550 nm, 650 nm and 750 nm, respectively. P.sub.450, P.sub.550, P.sub.650 and P.sub.750 are radiances of light having a wavelength of 450 nm, 550 nm, 650 nm and 750 nm, respectively, at 1,300 C. according to Planck's radiation law. All of internal transmittances in terms of a 10-mm thickness at wavelengths of 450 nm, 550 nm, 650 nm and 750 nm are 91% or more.

The invention concerns an automotive glazing comprising (i) at least one glass sheet having an absorption coefficient comprised between 5 m.sup.1 and 15 m.sup.1 in the wavelength range from 750 to 1650 nm and having an external face and an internal face, and (ii) an infrared filter. According to the present invention, an infrared-based remote sensing device in the wavelength range from 750 to 1650 nm, and preferably in the wavelength range from 750 to 1000 nm, is placed on the internal face of the glass sheet in a zone free of the infrared filter layer.

Disclosed herein are glass manufacturing methods, the methods including delivering a molten glass to a melting vessel including at least one electrode comprising MoO.sub.3, applying an electric current to the at least one electrode, contacting the batch materials with the at least one electrode for a time period sufficient to reduce an oxidation state of at least one tramp metal present in the batch materials, and melting the batch materials to produce a molten glass. Methods for modifying a glass composition are also disclosed herein, as well as glass articles produced by these methods.

A glass sheet having a composition comprising the following in weight percentage, expressed with respect to the total weight of glass: Total iron (expressed as Fe.sub.2O.sub.3) 20-750 ppm; Selenium (expressed as Se) 0.1-<3 ppm; Cobalt (expressed as Co) 0.05-5 ppm; and a ratio Er.sub.2O.sub.3/Fe.sub.2O.sub.3 0.1-1.5.
Such a glass sheet has a high luminous transmittance and shows edges which are colorless/achromatic and very luminous/bright, while maximizing the luminous transmittance. The glass sheet is particularly suitable due to its aesthetics as building glass or interior glass.

A glass substrate and a method for manufacturing the glass substrate are provided. The glass substrate may include a base glass including SiO.sub.2, Al.sub.2O.sub.3, and Li.sub.2O, and nanocrystals having an average diameter in a range from about 5 nm to about 10 nm, thereby exhibiting enhanced surface strength properties while maintaining good transmittance properties. The method may include a step of heat-treating a base glass, thereby providing a glass substrate having enhanced strength properties.

The invention relates to a glass sheet having high transmission of infrared (IR) radiation. More specifically, the invention relates to a glass sheet having a composition which comprises, in a content expressed as percentages by total weight of glass: SiO.sub.2 55-85% AI.sub.2O.sub.3 0-30% B.sub.2O.sub.3 0-20% Na.sub.2O 0-25% CaO 0-20% MgO 0-15% K.sub.2O 0-20% BaO 0-20% total iron (expressed in the form of Fe.sub.2O.sub.3) 0.002-1%, Cr.sub.2O.sub.3 0.001-0.5% Co 0.0001-0.5% Se 0.0003-0.5%. By virtue of its high transmission of IR radiation, said glass sheet can advantageously be used in a device using a technology requiring very good transmission of IR radiation, whether through the main faces or starting from their edge (for example, a screen or panel or pad) The invention thus also relates to the use of such a glass sheet in a device using infrared radiation propagating essentially inside said sheet.

Compounds, compositions, articles, devices, and methods for the manufacture of light guide plates and back light units including such light guide plates made from glass. In some embodiments, light guide plates (LGPs) are provided that have similar or superior optical properties to light guide plates made from PMMA and that have exceptional mechanical properties such as rigidity, CTE and dimensional stability in high moisture conditions as compared to PMMA light guide plates.