DIAMETER: 40.00mm + 0.00mm / – 0.10mm
THICKNESS: 2.00mm +/- 0.05mm
PARALLELISM: 4 ARC MINUTES MAXIMUM.
T.W.E: POWER: 5 FRINGES MAXIMUM WITHIN CLEAR
APERTURE, 2 FACES.
IRREG: 2.5 FRINGES MAXIMUM WITHIN CLEAR
APERTURE, 2 FACES.
CLEAR APERTURE: CENTRAL 35.00mm MINIMUM DIAMETER,
2 FACES.
SURFACE FINISH: 60-40 PER MIL-O-13830 WITHIN
CLEAR APERTURE, 2 FACES.
EDGE BEVEL: 0.25mm NOMINAL X 45deg, 2 PLACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: NONE, NOT REQUIRED.