Single crystal sapphire windows are ideal for demanding applications (such as laser systems) because of 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. Chemically, sapphire is single crystal aluminum oxide (Al2O3) and is useful in a transmission range from 0.15 to 5.5 microns.



Material Optical Sapphire (Al2O3)
Surface Accuracy  2 waves per 25.4mm at 632.8nm over 90% of aperture 
Surface Quality  80-50
Roughness  0.1 micron/inch 
Parallelism  <=3.5 arc min. 
Birefringence (no-ne) 0.008 for visible light orthogonal to optical axis
Axis Orientation  Random
Coating  None


Keep in touch with us

Any question, Email to us

Tel: 86 431 8167 8816 Fax: 86 431 8573 8723