DIAMETER: 0.750″+/-.002″
THICKNESS: 0.080″+/-.002″
PARALLELISM: 3 ARC SECONDS MAXIMUM.
EDGE BEVEL: 0.005″ NOMINAL X 45deg, 2 PLACES
FLATNESS: PWR: 1 FRINGE MAX, IRREG: 1/2 FRINGE MAX
CLEAR APERTURE: CENTRAL 0.500″MINIMUM DIAMETER.
SURFACE FINISH: 60-40 PER MIL-O-13830, 2 FACES
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: (0001)
COATING: ANTIREFLECTIVE COATING ON BOTH FACES FOR:
R AVG=2%, R MAX=2.5% FROM 1.8 TO 2.5 um
R AVG=1%, R MAX=1.5% FROM 3.4 TO 4.0 um
R AVG=1%, R MAX=1.5% FROM 4.3 TO 5.0 um
COATING SHALL MEET THE REQUIREMENTS OF MIL-C-
48497A; 3.4.1.1 ADHESION; 3.4.1.2 HUMIDITY;
3.4.1.3 MODERATE ABRASION; 3.4.2.1 TEMPERATURE
3.4.2.2 SOLUBILITY & CLEANABILITY.
CHARACTERISTICS: PWR-.25-5W; DENSITY-1000 W/Sqcm;
PULSE REP-15kHz, WIDTH 20nsec, PEAK PWR-50Kw/SqCm.