DIAMETER: 31.95mm + 0.00mm /- 0.25mm
THICKNESS: 3.00mm +/- 0.05mm
PARALLELISM: 3 ARC MINUTES MAXIMUM.
EDGE BEVEL: PROTECTIVE EDGE BREAK, 2 PLACES.
FLATNESS: 1/4 WAVE MAXIMUM @ 633um, 2 FACES.
SURFACE QUALITY: 40-20 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 80% OF FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, AVERAGE OPTICAL
GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001).
COATING: BROADBAND ANTIREFLECTIVE COATING FOR
> 95% TRANSMISSION FROM 2.10um TO 4.90um
WITH A NORMAL INCIDENCE ANGLE, APPLIED
TO BOTH FACES.