Optical Coatings

Improving the reflective behavior or transmission properties of optical systems

such as filters, lenses, spectacle lenses or mirrors.

A common application is definitely the production of anti-reflective and scratch-resistant eyeglasses.

Typical is a combination of many thin layers, to create different reflection characteristics or conductive layers. These layers are usually applied in batch coating systems by Physical Vapor Deposition (PVD) or evaporation processes and take place under vacuum conditions in the pressure range of 10^-3to 10^-4 mbar.

High vacuum pumps used for this application can be:

Oil diffusion pumps,
Mechanical or magnetic bearing turbomolecular vacuum pumps like the TURBOVAC family
Cryogenic pumps like our COOLVAC range.

Depending on the needed size of the vacuum system, a possible type of backing pumps are oil-lubricated rotary vane vacuum pumps like the SOGEVAC or TRIVAC product lines. Another alternative can be dry vacuum pumps like our DRYVAC or VARODRY families.

To achieve higher pumping speeds the backing pumps are often combined with Roots pumps like our broad RUVAC portfolio.

In addition to all above we also offer vacuum gauges, components, valves and leak detectors as well as RGAs. And of course, we can also provide all needed accessories for our products.