GLASS SHEET HAVING A HIGH TRANSMISSION IN THE INFRARED

摘要

The invention relates to a glass sheet having a composition that comprises, in an amount expressed in percentages by total weight of glass: SiO2: 55-85%; Al2O3: 0-30%; B2O3: 0-20%; Na2O: 5-25%; CaO: 0-20%; MgO: 0-15%; K2O: 0-20%; BaO: 0-20%; Total iron (expressed in Fe2O3 form): 0.002-0.06%; said composition also comprising one of the following components: manganese (expressed in MnO form), in an amount ranging from 0.01 to 1% by weight; antimony (expressed in Sb2O3 form), in an amount ranging from 0.01 to 1% by weight; arsenic (expressed in AS2O3 form), in an amount ranging from 0.01 to 1% by weight; or copper (expressed in CuO form), in an amount ranging from 0.0002 to 0.1% by weight. The invention also relates to the use of such a glass sheet in a device employing infrared radiation propagating essentially inside said sheet. By virtue of its high transmission at infrared wavelengths, said glass sheet may advantageously be used, for example, in a screen or panel or pad, the glass sheet defining a touch surface.

主权项

1. A glass sheet having a composition that comprises, in an amount expressed in percentages by total weight of glass:
55 to 85% of SiO2; 0 to 30% of Al2O3; 0 to 20% of B2O3; 5 to 25% of Na2O; 0 to 20% of CaO; 0 to 15% of MgO; 0 to 20% of K2O; 0 to 20% of BaO; 0.002 to 0.06% of total iron, expressed in Fe2O3 form; and at least one component selected from the group consisting of: 0.01 to 1% of manganese, expressed in MnO form; 0.01 to 1% of antimony, expressed in Sb2O3 form; 0.01 to 1% of arsenic, expressed in As2O3 form; and 0.0002 to 0.1% of copper, expressed in CuO form.