200 380 780 1000 1200 1400
20
18
16
14
12
10
8
6
4
2
0
Light transmission curve
Speedglas welding filters keep the welder
protected from harmful UV and IR radiation.
This protection remains always, in ON, OFF,
dark and light state. The curve also shows that
the
transmission in the light state is dominated
by
green light. Therefore the ”green” glass in
the welding filter.
UV
(ultraviolet) radiation
– always blocked
(infrared) radiation
– always blocked
VISIBLE LIGHT IR
Wavelength (nm)
Transmittance (%)
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