CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 19.00mm + 0.00mm /- 0.10mm
THICKNESS: 6.40mm +/- 0.05mm
PARALLELISM: 3 ARC MINUTES MAXIMUM.
FLATNESS: 10 WAVES/INCH MAXIMUM, 2 FACES.
SURFACE QUALITY: 80-50 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 85% OF DIAMETER FACES.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).
COATING: NONE, NOT REQUIRED.