Window, Rectangle Metric, ZnSe - Model #: WR-19.05-Z-12.7-ET2.0-AR Size: 19.5mm x 12.7mm x 2.0mm E.T.
Coated: AR/AR @ 10.6µm
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 Corners with Face Angles per dwg.
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%