Specifications:
Material quality:
Laser Grade without boundaries and visible inclusions

Range of Sizes
Diameter : 1 - 101.6 +0/-0,10 mm
Thickness : 1 - 12 /-0.10 mm

Parallelism
Plano : <3 arc minutes

Clear Aperture (polished) 90% of diameter

Surface Figure (power-irregularity) at 0.63 microns
1 fringe - 0.5 fringe per inch

Surface Quality: Scratch-Dig
80/50, 60/40, 40/20 : per MIL-0-13830

Side 1: Reflectivity Tolerance at 10.6 microns:
1%-5%: ± 1%
6%-85%: ± 5%
86%-95%: ± 2%

Side 2: AR Coating Reflectivity at 10.6 microns
Typically <1% per surface. Varies with polarization and angle of incidence

Angle of incidence 45°