| 摘要 |
The invention concerns a method of producing optical elements, in particular filters, with interference layers comprising alternately slightly refractive and highly refractive dielectric layers deposited on a substrate S. 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. Production costs are reduced, and these layers possess the optical properties of known interference layers however resistance to external influences is greatly increased. In the case of mineral substrates, the coatings also offer considerable resistance to boiling.
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