DIAMETER: 76.00mm +/- 0.10mm
THICKNESS: 3.00mm +/- 0.10mm
PARALLELISM: 5 ARC MINUTES MAXIMUM.
EDGE BEVEL: 0.20mm NOMINAL X 45deg, 2 PLACES
SURFACE ACCURACY: 10 WAVES/INCH MAXIMUM, 2 FACES.
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001) +/- 2deg
COATING: ANTIREFLECTIVE COAT FOR < 1.0%
REFLECTANCE PER SURFACE FROM 1300nm TO
1800nm WITH A NORMAL INCIDENCE ANGLE,
APPLIED TO BOTH FACES.
NOTE: COATING MUST BE ACID RESISTANT.