Sapphire (Al2O3) Windows

Sapphire or aluminum oxide (Al2O3) is single crystal and is useful in a transmission range from 0.2 - 5.5μm, sapphire is suitable for MWIR 3-5μm thermal imaging applications. Sapphire Windows are made from single crystal sapphire, they are ideal for demanding applications for their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamonds and, because of their structural strength, sapphire windows can be made much thinner than other common dielectric windows with improved transmittance.