Outer Diameter: 5.250″ Nominal
Overall Height: 2.950″ Nominal
Wall Thickness: 0.375″ Nominal
Outer Spherical Radius: 2.625″ Nominal
Inner Spherical Radius: 2.250″ Nominal
Inner Diameter (Top): 3.612″ Nominal
Inner Diameter (Bottom) 4.112″ Nominal
Spherical Surface Irregularity: 1.0 Fringe Maximum @ 633nm Over
Any 2.00″ Diameter Sub-Aperture,
Both Surfaces
Clear Apertures: See Drawing
OD / ID / Edge Configuration: See Drawing
Total Thickness Variation: 0.004″ Maximum Best Effort
Inside and Outside Edge Radii: 0.050″ Nominal, 4 Places
OD Edge Flats: Not Required.
Surface Quality: 40-20 Per MIL-PRF-13830, Both Spherical Surfaces
Material Type / Quality: Sapphire, Optical Grade.
Coating: None, Not Required.