Metallic Coatings

Metallic coatings provide the broadband reflection than the dielectric mirrors. The reflection from the metallic mirror is less sensitive to the angle of incidence and polarization of the input light. For the broadband applications for example, UV-VIS-NIR and VIS-NIR-MIR metallic coatings are the preferable candidates. But all the metal coatings more or less than the other are prone to oxidation or sulphidation effects. Hence they need to be protected.