CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 1.420″+/-.005″
THICKNESS: 0.079″+/-.001″
PARALLELISM: 20 ARC SECONDS MAXIMUM
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
CLEAR APERTURE: CENTRAL 1.278″ MINIMUM DIAMETER,
2 FACES.
SURFACE ACCURACY: 1/4 WAVE MAXIMUM @ 633nm,2 FACES
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: C-PLANE
COATING: NONE, NOT REQUIRED.