DIAMETER: 30.00mm +/- 0.05mm
THICKNESS: 1.20mm +/- 0.10mm
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 10 WAVES MAXIMUM @ 0.633um, 2 FACES.
EDGE BEVEL: 0.010″ NOMINAL X 45deg, 2 PLACES.
SURFACE FINISH: 40-20 PER MIL-PRF-13830. 2 FACES.
CLEAR APERTURE: CENTRAL 26.00mm MINIMUM DIAMETER.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: NONE, NOT REQUIRED.