Fotografia

https://www.ecoptik.net/products/glod-au-mirror/
Ecoptik provide the round, square and customized shape mirrors with a protected gold coating in various sizes. Protected gold is ideal for use in the IR wavelength range. The protective dielectric overcoat supplied by Ecoptik is layered over the gold to help protect it from damage and make cleaning easier. These optics provide >96% average reflectance from 800nm to 20μm.