CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 0.500″+.000″/-.010″
OD FLAT: NONE, NOT REQUIRED.
THICKNESS: 0.1005″ NOMINAL TO YIELD RETARDATION.
PARALLELISM: 2 ARC SECONDS MAXIMUM.
TRANSMITTED WAVEFRONT: 1/10 WAVE MAXIMUM AT 633nm.
RETARDATION TOLERANCE: +/- 1/300 WAVE
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 0.375″ OF DIAMETER FACES.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: M-PLANE
COATING: DUAL-BAND ANTIREFLECTIVE COAT MAXIMUM
TRANSMISSION AT BOTH 2090nm AND ALSO
4600mm WITH A NORMAL INCIDENCE ANGLE,
APPLIED TO BOTH FACES.