DIAMETER: 1.250″+/-.005″
THICKNESS: 0.125″+/-.001″
PARALLELISM: 5 ARC SECONDS MAXIMUM.
EDGE BEVEL: PROTECTIVE EDGE BREAK, 2 PLACES.
TRANSMITTED WAVEFRONT ERROR: 0.5 WAVES MAXIMUM
SURFACE QUALITY: 20-10 PER MIL-O-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 90% OF DIAMETER, 2 FACES.
MATERIAL TYPE/QUALITY: SINGLE CRYSTAL QUARTZ,
OPTICAL GRADE, NO FRACTURES, CRACKS, OR LINEAGE.
MATERIAL TO BE FREE OF LIGHT SCATTER AND LATTICE
DISTORTION.
CRYSTALLOGRAPHIC ORIENTATION: Z-CUT +/-15 MINUTES
COATING: NONE, UNCOATED SUBSTRATE