HIGH INFRARED TRANSMISSION GLASS SHEET

摘要

The invention relates to a glass sheet with high IR transmission. More precisely, the invention relates to a glass sheet having a composition comprising in a content expressed in percentages of the total weight of the glass: 55≤ SiO2≤ 85% 0≤ Al2O3≤ 30% 0≤ B2O3≤ 20% 0≤ Na2O≤ 25% 0≤ CaO≤ 20% 0≤ MgO≤ 15% 10 < K2O≤ 20% 0≤ BaO≤ 20% 0.002 ≤ total iron (expressed in the form of Fe2O3) ≤ 0.06%, said composition comprising a chromium content such as : 0.0001% ≤ Cr2O3≤ 0.06% expressed in a percentage of the total weight of glass. Because of its high IR transmission the glass sheet according to the invention can be advantageously used, for example, in a screen or panel or pad, wherein the glass sheet defines a touch sensitive surface. The invention also relates to the use of such a glass sheet in a device using an infrared radiation that propagates essentially inside said sheet.