ERCC-1012-G-20-99.5

CONFIGURATION: DISC, PLANO-CONCAVE (20 METER)
DIAMETER: 1.000″+.000″/-.005″
EDGE THICKNESS: 0.120″+/-.010″
WEDGE ERROR: 3 ARC MINUTES MAXIMUM
SPHERICAL RADIUS: 20 METER CONCAVE
SURFACE ACCURACY: 1/40 WAVE MAXIMUM @ 10.6um.
SURFACE FINISH: 40-20 SCRATCH-DIG PER MIL-O-13830.
MATERIAL TYPE/QUALITY: GERMANIUM, SINGLE CRYSTAL.
COATING: CONCAVE FACE: 99.5% to 99.8% REFLECTANCE
AT 10.6 MICRONS WITH A
NORMAL INCIDENCE ANGLE.
PLANO FACE: ANTIREFLECTANCE COAT FOR
0.50% MAXIMUM REFLECTANCE
AT 10.6 MICRONS WITH A
NORMAL INCIDENCE ANGLE.
MARKING: ARROW ON OD SURFACE POINTING TOWARDS
CONCAVE FACE.