CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 0.210″+.000″/-.002″
THICKNESS: 0.020″+/-.001″
PARALLELISM: 0.0005″ MAXIMUM WEDGE.
EDGE BEVEL: 0.005″ MAXIMUM X 45deg, 2 FACES.
FLATNESS: POWER: 3 FRINGES MAXIMUM, 2 FACES.
(0.170″CA) IRREG: 1/2 FRINGE MAXIMUM, 2 FACES.
SURFACE QUALITY: 60-40 PER MIL-O-13830, 2 FACES.
MATERIAL TYPE/QUALITY: GERMANIUM, OPTICAL GRADE.
COATING: NONE, NOT REQUIRED.