Sapphire (Al2O3) Windows

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  • Regular price $54.00



Sapphire's main selling point is its exceptional hardness and versatile optical range in the UV to the mid-IR range at around 5µm. Sapphire's extreme resistance to thermal conductivity, high dielectric constant and resistance to corrosive materials makes it an ideal choice for extreme conditions. Sapphire is the second hardest material available next to diamond and can be made thinner than other windows, which further improves transmittance.

Firebird provides these in several uncoated stock configurations but can provide customized and coated to your specifications. 

Sapphire (Al2O3) Specs:

Wavelength range: 150nm-4.5µm Coating: Uncoated
Diameter tolerance: +/-0.1mm Surface Quality: 60/40
Thickness tolerance: ±0.2mm Paralellism: <5 arc minute
Clear Aperture: 90% Density: 3.98g/cm3
Melting point: 2053ºC Young's Modulus: (GPa): 435
Coefficient of Thermal Expansion: 8.8x10/ºC Knoop Hardness:  2000kg/mm2