Specification：
Material:Optical glass
Size:2-300mm
Size Tolerance:+0/-0.01~+0/-0.1mm
Thickness Tolerance:±0.01~±0.1mm
Irregularity (P-V) @ 632.8nm:λ/10~λ/2@632.8nm
Surface Quality:10/5~60/40
parallelism:<3”~3'
Clear Aperture:>90%
Bevel:Protective bevel as needed
