... , Color of material, Dimensions, AR (anti-reflectivity), Type of intermediate layers, Construction, Gasket type, Frame finish1. Window materialOptical glass, Plexiglas (PMMA), ... reflective surface to avoid glaring and to enhance contrast.4. Type of intermediate layersCopper mesh, stainless steel mesh, conductive foil or ... the copper foil or silver busbar instead of conductive gasket. EMI filter window