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Optical Sapphire Windows

Sapphire crystal is the hardest oxide crystal, is the basic single crystal form of aluminum oxide (Al2O3). It has a series of excellent physical and chemical characteristics such as high strength, high hardness, high temperature resistance,abrasion resistance, corrosion resistance, good light transmission performance and excellent electrical insulation performance. Therefore, it can be widely used in various demanding fields such as national defense, scientific research, and civil industry.

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Product Description

Thermal Properties of Sapphire
Melting poimt	2045℃
Application temperature	<2000℃
Thermal expansion	5.8×10^-6/K
Heat capacity	18.6cal (Mol ℃) ,(25℃) ,30cal (Mol ℃) (1000℃)
Thermal conductivity	25.12W/m.k (@100Mol ℃)
Specic heat	0.418W.s/g.k
Optical Properties of Sapphire
Refraction	nd=1.768 ne=1.760
Optical transmission	T≈82%@0.3-5um
Reflective loss	20%

Specifications:
Material:Sapphire
Diameter Tolerance :+/-0.15 mm
Thickness Tolerance :+/-0.1mm
Parallelism <3 arc minutes
Surface Quality :60-40
Surface Figure:λ/10@633nm
Bevel:0.25mm×45 °
Clear Aperture:90%
Coating:Specified by customers

Transmittance of Sapphire:

Highly recommended Sapphire Items from Yutai Optics:
Sapphire windows,
Sapphire Step Glass,
Sapphire Windows with Holes,
Sapphire Windows with Groove,
2/4/6/8" Sapphire Wafers.