SCD1491-01B

CONFIGURATION: DISC, PLANO-CONCAVE (4 METER)
DIAMETER: 25.40mm + 0.00mm /- 0.25mm
EDGE THICKNESS: 7.35mm +/- 1.15mm
WEDGE ERROR: 3 ARC MINUTES MAXIMUM.
SURFACE ACCURACY: SURFACE"1": 1/4 WAVE MAXIMUM
SURFACE"2": 1 WAVE MAXIMUM
SURFACE QUALITY: 10-5 SCRATCH-DIG, 2 FACES.
RADIUS of CURVATURE: 4000mm +/- 40mm (SURFACE"1")
MATERIAL TYPE/QUALITY: CVD ZnSe, LASER GRADE.
COATING: SURFACE "1": HIGH REFLECTANCE COATING
(C0NCAVE) FOR > 99.90% REFLECTANCE
AT 2.94 MICRONS WITH A
NORMAL INCIDENCE ANGLE.
SURFACE "2": NONE, UNCOATED,TRANSMISSION
(PLANO) 80% MIN AT 594nm, 90%
BEST EFFORT
DAMAGE THRESHOLD @ 2940nm: 400 J/SQ.CM, IN 100uSEC
PULSE @ 10Hz.
COATING DURABILITY: MIL-C-48497