Newport MKS Elliptical Mirror, Gold, Borofloat, 33 mm x 46.7 mm, λ/10, 650-20,000 nm 13E20ER.4

The 13E20ER.4 Broadband Gold Elliptical Mirror is an excellent general purpose, broadband reflector. This 33.02 mm (1.30 inch) minor axis, 46.70 mm (1.838 inch) major axis, elliptical mirror is made from a 9.37 mm thick Borofloat® 33 substrate. Borofloat® 33 has low thermal expansion and is an excellent substrate for most applications. The ER.4 protected gold coating is ideal for applications requiring broadband reflectance in the near IR to the far IR. A multilayer dielectric overcoat provides protection to the gold from the environment. The 13E20ER.4 has an average reflectivity greater than 96% from 650-1700 nm and greater than 98% from 1.7-20 µm. This mirror has a λ/10 surface flatness and a 15-5 surface quality.