Specification：
Material:Optical glass, Fused Silica, Silicon,Germanium, Znse,Sapphire,Caf2,Mgf2,Baf2...
Diameter:1-500mm
Diameter Tolerance:+0/-0.01~+0/-0.1mm
Thickness Tolerance:±0.01~±0.1mm
Focal Length Tolerance (%):±1%
Irregularity (P-V) @ 632.8nm:λ/10~λ/2@632.8nm
Surface Quality:10/5~60/40
Centration:<30”~3'
Clear Aperture:>90%
Bevel:Protective bevel as needed
Coating:Uncoated,AR,BBAR
