DIAMETER: 1.750″+/-.002″
THICKNESS: 0.0400″+/-.0003″
PARALLELISM: 1.7 ARC MINUTES MAXIMUM
TRANSMITTED WAVEFRONT ERROR: 2 WAVES P-V MAXIMUM
EDGE BEVEL: 0.003″/0.005″ X 45deg, 2 PLACES.
SURFACE QUALITY: 10-5 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 1.10″MINIMUM SQUARE AREA.
REFERENCE FLAT: 0.500″WIDE, RANDOM LOCATION.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: NONE, NOT REQUIRED.