CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 2.000″+.000″/-.005″
THICKNESS: 0.248″+/-.001″
PARALLELISM: 3 ARC MINUTES MAXIMUM
FLATNESS: 1/2 WAVE MAXIMUM, 2 FACES.
CHIPPING: NOT TO EXCEED 0.014″ IN SIZE
SURFACE QUALITY: 40-20 PER MIL-O-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 1.800″ MINIMUM DIA, 2 PLCS
EDGE BEVEL: 0.020″ MAXIMUM X 45deg, 2 PLACES
MATERIAL TYPE/QUALITY: CALCIUM FLUORIDE, 193nm
EXIMER GRADE, TO BE SELECTED AND POLISHED TO
PROVIDE THE STRONGEST WINDOW POSSIBLE, NO GRAIN
BOUNDARIES,NO CLEAVAGE POINTS.
COATING: NONE, UNCOATED SUBSTRATE.