Radiation-resistant glass К108 window for a night-sight
This window is placed near the above-mentioned Si window and operates in the day-time. Combination of AR coating outside and indium tin oxide (ITO) coating from inside allows to minimize residual reflection and prevent ice accretion, snow ticking аnd to conduce of water/hoar/ice removal. As a result a window effectively works at three working wavelength ranges.
Specification:
Part type
Plano-plano window
Material
Radiation-resistant glass К108
Overall dimensions, mm
228.0 (-0.3/-0.5) x 109.0 (-0.3/-0.5)
Thickness, mm
20.0 (+/-0.5)
Surface quality, scr/dig
60/40
Surface figure, fringes
N<=2, delta N<=0.2 @633 nm
Wedge, arc. min.
<1
AR Coating (AR/ITO type) @ 430-680 nm, 870-920 nm and 1060 nm
See the curve attached