LCM-12.7-Z-21.39-ET4.0

CONFIGURATION: DISC, PLANO-CONCAVE (30.00mm RofC)
DIAMETER: 0.500″+.000″/-.005″
EDGE THICKNESS: 0.160″+/-.005″
WEDGE ERROR: 5 ARC MINUTES MAXIMUM.
SURFACE ACCURACY: 1/2 WAVE MAXIMUM @ 0.633um.
SURFACE QUALITY: 20-10 PER MIL-PRF-13830, 2 FACES.
SURFACE FINISH: < 15 ANGSTROMS RMS, 2 FACES.
MATERIAL TYPE/QUALITY: ZINC SELENIDE, LASER GRADE.
COATING: NONE, UNCOATED SUBSTRATE.
MARKING: ARROW ON OD SURFACE POINTING TOWARDS
CONCAVE FACE.