Datalogic Arex 30W, User Manual

Page: 80 / 96

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N.O.H.D. DETERMINATION AND O.D. OF PROTECTION GOGGLES
In order to determinate the characteristics of the protection goggles, it is essential to determine the
characteristics of the radiation, knowing its optical path, the dimensions of the beam and its divergence.
It is very important to know the real divergence of the beam in output from the focalization scan lens (F-
Theta).
With all these optical data it is possible to calculate the Nominal Ocular Hazard Distance (N.O.H.D.)
and the
optical density (O.D.) requested to the protection filters of the laser radiation.
Calculations have been done following the CEI EN 60825-1 (2014) Normative regarding nominal
distance and optical risk in the worst condition and in case of accident exposure of 10 seconds for
direct radiation and 100 seconds for diffused radiation.
Wavelength RIF
1070 nm (± 10 nm)
1120 nm (Raman emission)
Laser Type Q-Switched fiber laser
Observation type Direct radiation
Pulse energy
1 mJ @ 30 kHz for AREX 30W
1 mJ @ 50 kHz for AREX 50W
Pulse duration 100 ns
Beam Diameter at F-Theta lens exit DL ~ 6.0 mm
Beam divergence on the lens
θ
2
0.8 mrad
Focal of the F-Theta lens F 160 mm
Real divergence after the lens
θ
3
31,2 mrad
Exposure time 10 s
Max beam scanning angle ± 20° each axis