Diameter: 1.000″+/-.010″
Thickness: 0.157″+/-.001″
Parallelism: 3 Arc Minutes Maximum
Edge Bevel: 0.020″ Maximum x 45 Degrees, Both Edges
Flatness: 1/2 Wave Maximum @ 633nm, Both Faces
Surface Quality: 40-20 per MIL-PRF-13830, Both Faces
Clear Aperture: Central 0.800″ Minimum Diameter
Material Type / Quality: Calcium Fluoride, Single Crystal,
Optical Grade
Coating: None, Not Required