Glass sheet having high transmission of infrared radiation
Abstract:
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: SiO2 55-85%; Al2O3 0-30%; B2O3 0-20%; Na2O 0-25%; CaO 0-20%; MgO 0-15%; K2O 0-20%; BaO 0-20%; Total iron (expressed in the form of Fe2O3) 0.002-0.06%, a chromium content (expressed in the form of Cr2O3) ranging from 0.0015% to 1% and a cobalt content (expressed in the form of Co) ranging from 0.0001% to 1%. By virtue of its high transmission of IR radiation, the glass sheet according to the invention 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 sheared edge (for example, a screen or panel or pad, the glass sheet defining a touch surface). The invention thus also relates to the use of such a glass sheet in a device using infrared radiation propagating essentially inside said sheet.
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