Diameter: 50.80mm + 0.00mm /- 0.20mm
Thickness: 12.70mm +/- 0.25mm
Parallelism: < 3 Arc Minutes.
Edge Bevel: 0.50mm Nominal Face Width x 45 Degrees,
Both Edges
Flatness: 1/12 Wave Maximum @ 633nm, One Face
1/4 Wave Maximum @ 633nm, Other Face
Surface Finish: 10-5 Per MIL-PRF-13830, Both Faces
Clear Aperture: Central 95% of Diameter Faces
Material Type / Quality: Sapphire, Optical Grade
Crystallographic Orientation: c-Plane
Marking: Arrow on OD Surface Pointing Towards the 1/12 Wave
Flat Face
Coating: None, Uncoated Substrate