Round windours

Specifications
Diameter (DIA): + 0/-.18mm
Center Thickness (CT): +/- .2mm
Cosmetics: 60/40
Surface Flatness: 1/10 wave @ 632.8nm
Parallelism: 30 arc seconds
Clear Aperture: 90% of diameter

Square windows

Specifications
Length: +- .25mm
Center Thickness (CT): +- .2mm
Cosmetics: 60/40
Surface Flatness: 1/10 wave @ 632.8nm
Parallelism: 30 arc seconds
Clear Aperture: 90% of surface area

Brewster Window

Specifications
Diameter (DIA): + 0/-.18mm
Center Thickness (CT): +/- .2mm
Cosmetics: 60/40
Surface Flatness: 1/10 wave @ 632.8nm
Parallelism: 30 arc seconds
Clear Aperture: 90% of diameter