Material

BK7, UV Fused Silica, Borofloat,B270, Borosilicate(Pyrex) or other

Dimension Tolerance

+0.0/-0.1mm

Thickness Tolerance

±0.1mm

Clear Aperture

>90%

Parallelism

Standard: 30 arc seconds
High Precision: 10 or 5 or 2 or 0.5 arc seconds

Surface Quality

Standard: 60/40
High Precision: 20/10

Flatness

Standard: λ/2 @633nm per 25mm
High Precision: λ/10@633nm per 25mm

Chamfer

Protected <0.4mmx45deg

Coating

Uncoated, available