Domes with a Neutral Density Filter
For proper working of a sky camera the solar radiation should be correctly dosed. Otherwise superfluous heating of the covering dome may increase humidity which result in water drops on the inner surface of the dome. To solve this task Tydex offers special coating which allows to attenuate the incoming solar flux - neutral density filter.
Such coating allows to reach a transmittance of around 1% (OD 2.0) across the visible spectrum.
Specification:
Material
glass / quartz
Type of a part
Dome
Diameter, mm
76 (+0/-0.2)
Central thickness, mm
3.0 (±0.2)
EFL tolerance, %
+/-2
Surface quality, scr/dig
80/50
Coatings
neutral density filter
Fig. 5. Dependence of transmission on the angle of incidence.