Patent ID: 6720081
Filing Date: 2004-04-13
Classification: C03C,G02B

Abstract:
A UV-reflective interference layer system for transparent substrates with broadband antireflection in the visible wavelength range, the interference layer system comprising at least five individual layers, wherein consecutive layers of the five individual layers have different indices of refraction and the five individual layers have UV and temperature-stable inorganic materials, characterized in that the interference layer system has the following structure:substrate/M1/T1/M2/T2/S, wherein substrate designates the transparent substrate, M1, M2 denote layers with intermediate index of refraction, T1, T2 denote layers with high index of refraction, S denotes a layer with low index of refraction, and for a reference wavelength of 550 nm the indices of refraction of the individual layers lie in the following range: nlow&lE;1.6 1.6>nintermediate<1.8 1.9&lE;nhigh â€ƒand the thickness of the individual layers lies in the following range: for the layer M1: 70 nm&lE;dM1&lE;100 nm for the layer T1: 30 nm&lE;dT1&lE;70 nm for the layer M2: 20 nm&lE;dM2&lE;40 nm for the layer T2: 30 nm&lE;dT2&lE;50 nm for the layer S: 90 nm&lE;dS&lE;110 nm.