Material

K9 fine annealed

Surface Flatness

λ/10 @633nm

Surface parallelism error

<3′

Clearing

I grade

Back

Fine grinding

Type　

             Diameter

Thickness

WN02GM-010

10.0

2.0

WN02GM-012

12.5

6.0

WN02GM-020

20.0

6.0

WN02GM-025

25.0

6.0

WN02GM-038

38.0

10.0

WN02GM-050

50.0

10.0