CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 25.40mm + 0.00mm /- 0.10mm
OD FLAT: NONE, NOT REQUIRED.
THICKNESS: 0.37044mm +/- 0.0003mm
PARALLELISM: 2 ARC SECONDS MAXIMUM.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
TRANSMITTED WAVEFRONT ERROR: 1/10 WAVE @ 633nm.
SURFACE QUALITY: 60-40 PER MIL-PRF-13830, 2 FACES.
CLEAR APERTURE: CENTRAL 20.00mm MINIMUM DIAMETER.
MATERIAL TYPE/QUALITY: SAPPHIRE, OPTICAL GRADE.
CRYSTALLOGRAPHIC ORIENTATION: M-PLANE +/- 5 MIN.
COATING: NONE, UNCOATED SUBSTRATE