CONFIGURATION: DISC, PLANE-PARALLEL
DIAMETER: 0.630″+/-.002″
THICKNESS: 0.160″+/-.002″
PARALLELISM: 3 ARC MINUTES MAXIMUM.
EDGE BEVEL: LIGHT PROTECTIVE BEVEL, 2 PLACES.
FLATNESS: 1/4 WAVE MAXIMUM, 2 FACES.
SURFACE QUALITY: 20-10 PER MIL-O-13830, 2 FACES.
MATERIAL TYPE/QUALITY: SCHOTT BK7 GLASS, GRADE A,
FINE ANNEALED.
COATING: MAXIMUM REFLECTIVE COATING FOR 99.8%
MINIMUM REFLECTANCE AT 1.064 MICRONS
WITH A NORMAL INCIDENCE ANGLE, APPLIED
TO 1 FACE.
MARKING: ARROW ON OD SURFACE POINTING TOWARDS
COATED FACE.