DIAMETER: 68.000mm + 0.000mm /- 0.025mm
CENTER THICKNESS: 5.00mm +/- 0.05mm
OVERALL THICKNESS: 7.669mm REF.ONLY
CONCAVE SAG DEPTH: 2.669mm +/- 0.025mm
CONVEX SPHERICAL RADIUS: 383.021mm +/- 0.958mm
CONCAVE SPHERICAL RADIUS: 194.398mm +/- 0.486mm
SPHERICAL SURFACE IRREG: 2.0 FRINGES MAXIMUM AT
633nm, BOTH FACES.
SPHERICAL SURFACE RMS: 0.06 FRINGE MAXIMUM @ 633nm
CENTERING ERROR: 0.013mm MAXIMUM T.I.R.
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
SURFACE ROUGHNESS: 120 ANGSTROMS RMS MAXIMUM.
EDGE BEVELS: 0.50mm +/- 0.10mm FACE WIDTH X 45deg.
CLEAR APERTURE: CONVEX FACE: 64.20mm DIAMETER.
CONCAVE FACE: 62.70mm DIAMETER.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: BROADBAND ANTIREFLECTIVE COATED PER
NOTE 6 ON DRAWING.