Sapphire window

Sapphire Window

Sapphire windows are made from single crystal sapphire, which is ideal for applications used in harsh enviroments such as laser systems and subsea imaging due to its extremely high surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and bases system. Sapphire crystal is second only to diamond in hardness and due to its structural strength, sapphire windows can be much thinner than other ordinary (K9, JGS1) windows. Chemically, sapphire is single crystal aluminum oxide (Al2O3) with very good transmittance from 180nm to 5500nm. 

Sapphire window is widely used in UV to MIR applications, could transmit between UV and IR spectrum at 180nm-5um. But feature a high refractive index at 1.75, we often deposit thin film (Anti-reflection coating) on both sides to improve the transmission. Wuhan Especial Optic can provide coating services according to different needs of customers, such as AR @308nm, AR @400-700nm etc.

Wuhan Especial Optic can customize various ultra large sizes, ultra high precision and special shapes (wedged, step) windows, with a diameter ranges 5-400mm, surface quality of 60/40--20/10,  roughness of Ra<5nm, parallelism<3 marcmin, and surface flatness λ/4--10 λ @633nm. For more information or any inquiries, please feel free to contact sales@wheo.cn.