a Laser beam
1.6.3 Distance, Measurements without Reflectors
The EDM module built into the product produces a visible laser beam which emerges from the
telescope objective.
The laser product described in this section is classified as laser class 3R in accordance with:
•
IEC 60825-1 (2014-05): “Safety of laser products”
Direct intrabeam viewing may be hazardous (low eye hazard level), in particular for deliberate
ocular exposure. The beam may cause dazzle, flash-blindness and after-images, particularly
under low ambient light conditions. The risk of injury for laser class 3R products is limited
because of:
a) unintentional exposure would rarely reflect worst case conditions of (e.g.) beam alignment
with the pupil, worst case accommodation,
b) inherent safety margin in the maximum permissible exposure to laser radiation (MPE)
c) natural aversion behaviour for exposure to bright light for the case of visible radiation.
Description Value (A5/A10)
Wavelength 658 nm
Maximum average radiant power 4.8 mW
Pulse duration 800 ps
Pulse repetition frequency (PRF) 100 MHz
Beam divergence 0.2 mrad x 0.3 mrad
NOHD (Nominal Ocular Hazard Distance) @ 0.25s 44 m
CAUTION
Class 3R laser products
From a safety perspective, class 3R laser products should be treated as potentially hazardous.
Precautions:
▶
Prevent direct eye exposure to the beam.
▶
Do not direct the beam at other people.
Labelling
General
Safety Directions 11
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