Datalogic AREX 401, User Manual

Page: 119 / 148

N.O.H.D. DETERMINATION AND O.D. OF PROTECTION GOGGLES
USER MANUAL
111
N.O.H.D. DETERMINATION AND O.D. OF PROTECTION
GOGGLES
In order to determine the characteristics of the protection goggles, it is essential to
determine the characteristics of the laser radiation, knowing its optical path, the dimen-
sions of the beam and its divergence.
Objective
Scanning Head
Beam-Exp Source
It is very important to know the real divergence of the laser beam at the output of the F-
Theta scan lens.
With the availability of these optical data, it is possible to calculate the Nominal Ocular
Hazard Distance (N.O.H.D.) and the Optical Density (O.D.) required by the laser radiation
protection filters (goggles).
Below results have been done considering Directive 2006/25/CE on the minimum health
and safety requirements regarding the exposure of workers to risks arising from physical
agents (artificial optical radiation). The user must check if Directive 2006/25/EC was
implemented as a law in his own country and regulate himself accordingly.
Only accidental direct exposure has been considered (exposure time = 10 seconds).
UNIT 10C-M65 10C-N65 10C-765 10C-A65 10C-B65
nm 1064
mJ 1 @ 100 kHz
ns 100
mm 7
mm 166 269.5 300.5 397 507
mrad 42.17 25.97 23.30 17.63 13.81
m 39.20 63.63 71.07 93.74 119.718
> 6
PARAMETER
Wavelength
Pulse Energy
Pulse Duration
Beam Diameter (DL)
Working Distance (WD)
1
Real Divergence after the
lens (
θ
3
)
N.O.H.D.
2
O.D.
3
1. See Note on page 27
2. Assuming the F-Theta scan lens as reference point
3. Assuming the F-Theta scan lens as reference point, this O.D. is valid for a distance greater of 0.5 m + WD