Diameter

2-150mm

Diameter Tolerance

+0/-0.1mm

Thickness Tolerance

+/-0.15mm

Focal Length Tolerance

+/-2%mm

Centration

<3′

Bevel

0.2mm-0/+0.2X45°

Surface Quality

60/40

Surface Flatness 

lambda/4@633nm

Clear Aperture

>90%

Material

Optical crystal such as glass, quartz, calcium fluoride, germanium, silicon

Coating

Specified by Customers