CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 1.575″+/-.005″
THICKNESS: 0.080″+/-.005″
PARALLELISM: 20 ARC SECONDS MAXIMUM.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
SURFACE ACCURACY: POWER: 1 WAVE MAXIMUM, 2 FACES
(@ 633nm) IRREG: 1/4 WAVE MAXIMUM,2 FACES
TRANSMITTED WAVEFRONT ERROR: 1/10 WAVE MAXIMUM
(@ 633nm) OVER CLEAR APERTURE.
SURFACE QUALITY: E-E PER MIL-F-48616 WITHIN CLEAR
APERTURE, 2 FACES.
CLEAR APERTURE: CENTRAL 0.750″ MINIMUM DIAMETER,
2 FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, CSI HEMEX GRADE
OR EQUIVALENT.
CRYSTALLOGRAPHIC ORIENTATION: (0001) +/- 2deg.
COATING: NONE, UNCOATED SUBSTRATE.