GENERAL INFORMATION Yttrium oxide forms hard and durable layers with a medium refractive index and low absorption over a wide wavelength band from the UV to the IR. It is especially well suited as a protective coating for aluminium, silver or gold mirrors. It acts as an excellent adhesion promoter for oxidic, metallic and fluoridic coatings, especially for applications in the IR. AREAS OF APPLICATION
AR and multilayer coatings in the UV, VIS and IR range