DIAMETER: 0.735″+/-.001″
THICKNESS: 0.062″+/-.001″
PARALLELISM: 0.0004″MAXIMUM T.I.R.
EDGE BEVEL: 0.005″+/-.003″ X 45deg, 2 PLACES.
FLATNESS: POWER: 2 FRINGES MAXIMUM, 2 FACES.
IRREG: 1/2 FRINGE MAXIMUM, 2 FACES.
SURFACE FINISH: F-F PER Para.3.3 WITHIN CLEAR
APERTURE, G-G OUTSIDE CLEAR APERTURE, 2 FACES.
OD SURFACE FINISH: FINE GROUND 16u”, OR BETTER.
CLEAR APERTURE: 0.675″MINIMUM DIAMETER, 2 FACES.
EDGE CHIPS: 0.005″MAXIMUM SIZE IN ANY DIRECTION.
MATERIAL QUALITY: AVERAGE OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: C-AXIS PERPENDICULAR
TO FACES, (0001) NOMINAL.
TRANSMITTANCE: OPTICAL TRANSMITTANCE FOR A
FINISHED WINDOW SHALL BE 85% AT
1000nm.