CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 2.000″+.000″/-.005″
THICKNESS: 0.150″+/-.001″
PARALLELISM: 3 ARC MINUTES MAXIMUM
FLATNESS: 1/2 WAVE MAXIMUM @ 633um, 2 FACES.
CHIPPING: NOT TO EXCEED 0.014″ IN SIZE
SURFACE QUALITY: 20-10 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 1.800″ MINIMUM DIAMETER.
EDGE BEVEL: 0.020″ MAXIMUM X 45deg, 2 PLACES
MATERIAL TYPE/QUALITY: CALCIUM FLUORIDE, SINGLE
CRYSTAL, IR OPTICAL QUALITY
COATING: NONE, NOT REQUIRED.