01 Jan 2011
Diameter Available 3mm--100mm Diameter Tolerance +0/-0.5mm Thickness Tolerance +/-0.05mm Focal Length Tolerance ±1% Surface Accuracy L/4 irregularity @632.8nm Surface Quality 20-10 S/D Centration <3 arc min Clear Aperture >90% Bevel Protective bevel Material BK7, Fused silica, and other optical glass Coating AR coating