CONFIGURATION: DISC W/ OD FLAT, PLANE-PARALLEL
DIAMETER: 1.135″+/-.001″
OD FLAT SIZE: 0.246″ NOMINAL (SEE DRAWING)
OD FLAT LOCATION: RANDOM.
THICKNESS: 0.040″+/-.001″
EDGE BEVELS: 0.005″ MAXIMUM X 45deg, BOTH FACES.
PARALLELISM: 4 ARC MINUTES MAXIMUM
FLATNESS: POWER: 4 FRINGES MAXIMUM, 2 FACES.
IRREG: 2 FRINGES MAXIMUM, 2 FACES.
SURFACE QUALITY: 20-10 PER MIL-PRF-13830, 2 FACES
CLEAR APERTURE: CENTRAL 0.864″ X 0.580″ MINIMUM
RECTANGULAR AREA, BOTH FACES.
SURFACE QUALITY: 40-20 PER MIL-PRF-13830, 2 FACES
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
COATING: NONE, NOT REQUIRED.