These general purpose plane windows are polished to lambda/10 flatness except where indicated otherwise. They are intended for for transmissive use and are parallel to better than 3 arcmin or 10 arcsec. Select a coating appropriate to your application or contact us with your special coating requirements. 

Parameters: 

Surface Flatness: λ /10@633nm
Surface Quality 10-5 ~ 20/10
Parallelism <3 arcmin
Diameter Tolerance +0.00/-0.10mm
Thickness Tolerance ± 0.2mm
Clear Aperture >90% of central diameter
Coating Optional
Bevel 0.30mm x 45° 
UV fused silica window

Surface Flatness λ /10@633nm
Surface Quality 10-5 scratch and dig
Parallelism <3 arcmin
Diameter Tolerance +0.00/-0.10mm
Thickness Tolerance ± 0.2mm
Clear Aperture >90% of central diameter
Coating Optional
Bevel 0.30mm x 45°