Transparente Verglasung mit Zwischenschicht zur Verbesserung von Interferenzfarben

摘要

A glazing article comprises a substrate (12) bearing a substantially transparent coating (14) comprising an optically functional layer (18) and a thinner anti-iridescence layer (20) undercoat mediate the optically functional layer and the substrate. The anti-iridescence layer (20) eliminates or substantially reduces iridescence and, in addition, is readily designed to make the overall coating colourless or to provide a substantially uniform, muted colour. The anti-iridescence layer comprises a high refractive index zone (22) on the substrate, having a refractive index higher than that of the substrate (12). Multiple gradient step zones (24,26) are stacked on the high refractive index zone (22). Anti-iridescence is provided for a wide variety of optically functional layers without significant impairment of the optical performance thereof.