As for the lenses only high-quality substrates are used for the windows.
ZnSe windows (Type WNZ) are used as end elements or protective windows. Similar to cutting lenses, they are made exclusively with high quality "laser grade" material.
In addition to standard AR coatings for 10.6 µm, special coatings such as broadband ARs or dual-band ARs are available.
General Specifications
Further specifications can be found on the data sheet.
Brewster windows are used in polarization separation. If WBZ windows are installed below the Brewster angle (q= 67.4° for ZnSe), the p component is fully transmitted and approximately 50% of the s component is reflected per side. When using EWBZ windows, a special coating is applied to the front side of the window, which ensures that the reflection for s-pol is increased to >98%.
General Specifications
Further specifications can be found on the data sheet.
Please note the special safety instructions when handling these optical components.