Diameter: 82.55mm + 0.00mm /- 0.10mm
Thickness: 5.00mm +/- 0.05mm
Parallelism: < 5 Arc Seconds
Edge Bevel: 0.20mm +/- 0.05mm X 45 Degrees, Both Edges
Clear Aperture: Central 77.00mm Diameter, Both Faces
Transmitted Wavefront Error: < 10 Nanometers RMS W FEt @ 633nm
Surface Quality: 20-10 Per MIL-PRF-13830, Both Faces
Surface Roughness: < 1.0 Nanometer RMS, Both Faces
Material Type / Quality: Sapphire, Optical Grade
Crystallographic Orientation: c-Plane +/- 10 Arc Minutes
Coating: None, Uncoated Substrate