Specifications:

Material: Silicon (Si) Single Crystal
Diameter Tolerances: +.000” -.005”
Thickness: ±.010”
Flatness: 1/40 wavelength @ 10.6µm
Parallelism: < 3 minutes of arc
Surface Quality: < 40/20 scratch dig Laser Finish

Spectral Performance:

Turning Mirrors Silicon with Dual Band Max Reflectance coating
Coated: Reflectance > 99.7% average @ 10.6µm
Reflectance: > 85% average for .633µm and .650µm
45° Angle Of Incidence
Absorption: < .30% @ 10.6µm