Optical coatings made of metals sometimes have considerable absorption losses. For this reason, the reflection is too low for many technical applications. One way of increasing reflection is to apply additional dielectric layers to the metal coating. Coating with the dielectric process reduces absorption and improves reflection. For highly reflective mirrors, on the other hand, only dielectric coatings are used. These coatings transmit the non-reflected part and can therefore achieve very low absorption values. Such optimized PVD coatings are optimized for a specific wavelength or laser and thus achieve excellent reflection values of up to 99.9%.
Optical coatings for CO2 lasers are designed to meet the highest demands. These coatings are used in the areas of laser cutting, laser marking and internal optics.
The surfaces treated with our high-quality PVD coatings are characterized by high resistance to environmental influences, even though the layers are wafer-thin and only a few nanometres or micrometres thick. Metallic coatings are only suitable for a limited range of applications due to their high absorption.