VERFAHREN ZUM HERSTELLEN VON OPTISCHEN ELEMENTEN MIT INTERFERENZSCHICHTEN

Optical elements, in particular filters, with interference layers comprise alternately slightly refractive and highly refractive dielectric layers deposited on a substrate 2. The first layer 1 applied to the substrate is Al2O3, constituting a slightly refractive layer, after which further layers 2 to n of ZnS and Al2O3 are applied in an alternating sequence. The last layer n consists of Al2O3. Such layers can be applied, at low temperatures, on flat substrates and, in particular, on sharply curved substrates.