DIAMETER: 25.00mm + 0.00mm /- 0.15mm
THICKNESS: 3.00mm +/- 0.05mm
PARALLELISM: 3 ARC MINUTES MAXIMUM.
EDGE BEVEL: 0.50mm +/- 0.20mm X 45deg, 2 PLACES.
FLATNESS: 10 WAVES MAXIMUM @ 633um, 2 FACES.
SURFACE FINISH: 60-40 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 85% MINIMUM DIAMETERS.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001) +/- 2deg.
COATING: NONE, NOT REQUIRED.