PVD coatings

We coat metals according to customer specifications and optimised for the corresponding applications. Our services range from the manufacture of individual parts to large-scale production. The PVD coating of optical glass takes place in a high vacuum. In order to achieve the desired optical properties, the individual layers must be precisely controlled during PVD coating. Most coatings are produced by thermal vapour deposition. Vaporisers are required for this purpose, which are located at the bottom of the system. The optics to be coated are fixed in a rotating calotte.

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 optimised PVD coatings are optimised 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 fields of laser cutting, laser marking and internal optics.

The surfaces treated with our high-quality PVD coatings are characterised by their 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.