Total Wavefront Distortion < 1/20 wave @ 10.6µm over Central 90% Clear Aperture Wedge < 3 minutes of Arc Surface Quality: 40/20 or better Scratch/Dig

Spectral Performance:

Coated: AR/AR @ 10.6µm Standard high efficiency low loss anti-reflectance thin film coating applied to both sides. Reflectance per surface @ 10.6µm for normal incidence <0.20% per surface Total finish part Absorption < .25% Transmission at normal incidence > 99% Transmission at 22.5% > 98.3%

This is a Protection Window for a Laser Engraving Machine and spare part. Any use or diversion contrary to US export law is prohibited and restricted.