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Optical Materials

Introduction

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 materials

mediumn*
air1.0003
water1.333
CaF21.434
BaF21.474
glass1.5-1.9
synthetic quartz (fused silica)1.458
crystalline quartz1.544 (no), 1.553 (ne)
calcite1.658 (no), 1.486 (ne)
sapphire1.769
diamond2.417
silicon3.478 (1.55 Ám)
ZnSe2.624
2.403 (10.6 Ám)
*Refractive index at 589.3 nm and room temperature, unless noted otherwise.

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