Sapphire Windows

COE Optics can afford to you excellent UV & IR grade sapphire windows with low scattering and birefringence. Those sapphire windows are an ideal material for applications where high pressure, vacuum, or corrosive atmospheres because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis.

COE Optics' sapphire windows are optical grade, free of any visible defects as bubbles, blocks, twins, etc. COE Optics' sapphire is synthetic corundum and grown by the Kyropoulos method. We can supply you Vernuil, HEM and EFG sapphire windows by your request, too.

One of our sapphire windows' outstanding performances is "transmission". Our lab testing demonstrates that COE Optics' sapphire windows can reach T >70%@190nm and T>85@ mid-IR (4.3UM).

Due to SAPPHIRE amazing anti-scratches performance, all watches manufacturers, i.e, Omega, Rolex choose sapphire windows as their watch glasses.

Does it mean, sapphire can just work as watch glasses?

Of course not: Sapphire windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres and they are widely used in electro-optics, aerospace, bio-medical areas. For example, sapphire domes work in missile guides and Deep Ocean. Sapphire windows are the best cooling contact material for the aesthetic industry. In today's market, famous aesthetic manufacturers, i.e., Candela & Syneron, Lumenis, DEKA, and Alma Lasers choose sapphire windows as the main contacting material for their aesthetic machines.

Sapphire windows are widely used in the LED industry and all world optical grade sapphire crystals are mainly for LED markets; Sapphire windows are widely used in barcode scanners, too.