Sapphire square /rectangular window

Specifications: Substrate Material: sapphire Orientation: C A R or free Diameters Available:2mm to 320mm Diameter ToleranceL+0.00/-0.05mm Surface Quality:40-20 or better Surface Flatness:1/4 lambda Surface Irregularity (Peak to Valley):1/2lambda Clear Aperture:>90% of diameter Ovality:+0.00/-0.02mm Coating: on request For more details, please visit http://www.betteroptics1.com