CONFIGURATION: DISC, PLANO/CONVEX
DIAMETER: 2.000″+/-.002″
CENTER THICKNESS: 0.219″+/-.008″
EDGE THICKNESS: 0.197″REF.ONLY
EDGE BEVEL: 0.010″ NOMINAL X 45deg, 2 PLACES.
SPHERICAL RADIUS: 22.158″
CENTERING ERROR: 3 ARC MINUTES MAXIMUM.
CLEAR APERTURE: CENTRAL 1.800″ MINIMUM DIAMETER.
SURFACE FINISH: 20-10 PER MIL-O-13830, 2 FACES.
SURFACE FIGURE: PLANO: POWER: 1 WAVE MAXIMUM
IRREG: 0.1 WAVE MAXIMUM **
SPH.RAD: POWER: 1 WAVE MAXIMUM
IRREG: 0.1 WAVE MAXIMUM **
MATERIAL QUALITY: OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: C-AXIS PERPENDICULAR
TO PLANO FACE, (0001) NOMINAL.
COATING: NONE, UNCOATED SUBSTRATE.
** BEST EFFORT, 0.2 WAVE ACCEPTABLE