Definition of optical materials

This document provides data on materials that are used for optical components (mirrors, lenses, and windows) in different parts of the electromagnetic spectrum. Mirrors X-rays Ultraviolet aluminum Visible aluminum Near infrared gold infrared copper, gold Lenses X-rays Ultraviolet fused silica (synthetic quartz), sapphire Visible glass, sapphire Near infrared glass, sapphire infrared CaF2, ZnSe Windows X-rays beryllium Ultraviolet fused silica, sapphire Visible glass, sapphire Near infrared glass, sapphire infrared NaCl, BaF2, CaF2, ZnSe Refractive index of some optical materialsmediumn*air1.0003water1.333CaF21.434BaF21.474glass1.5-1.9synthetic quartz (fused silica)1.458crystalline quartz1.544 (no), 1.553 (ne)calcite1.658 (no), 1.486 (ne)sapphire1.769diamond2.417silicon3.478 (1.55 µm)ZnSe2.6242.403 (10.6 µm) *Refractive index at 589.3 nm and room temperature, unless noted otherwise.