Material

Fused Silica

Surface Flatness

λ/10 @633nm

Surface parallelism error

<3′

Clearing

I grade

Back

Fine grinding

Type　

               Diameter

 Thickness

WN04GM-010

10.0

2.0

WN04GM-012

12.5

6.0

WN04GM-020

20.0

6.0

WN04GM-025

25.0

6.0

WN04GM-038

38.0

10.0

WN04GM-050

50.0

10.0