CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 1.330″+0.00/-.010″
THICKNESS: 0.250″+0.00/-.005″
PARALLELISM: 3 ARC MINUTES MAXIMUM
EDGE BEVEL: 0.020″+0.00/-.010″ X 45deg, 2 FACES.
OD AND BEVEL SURFACE FINISH: POLISHED TO 80-50
PER MIL-PRF-13830.
SURFACE FINISH: 40-20 PER MIL-PRF-13830, 2 FACES.
SURFACE ACCURACY: 0.5 WAVE OPTICAL PATH DIFFERENCE
ACROSS EACH SURFACE AT 632nm.
IMPERFECTIONS: NO VISLBLE SEEDS, OPAQUE INCLUSIONS
CHIPS, OR FRACTURES ALLOWED
LOT CONTROL: A MINIMUM OF 20 PIECES IS REQUIRED
FROM EACH MATERIAL LOT.
MATERIAL: HIGH PURITY FUSED SILICA, CORNING 7980,
NO SUBSTITUTIONS ALLOWED.
COATING: NONE, NOT REQUIRED
NOTE: THIS IS A TRACEABLE AND FRACTURE CRITICAL
ITEM, MAINTAIN TRACEABILITY RECORDS.