Manual

LW20 / SF20 LiDAR sensor
Product manual
12. Instructions for safe use
The LW20 is a laser based altimeter that emits ionizing laser radiation. The level of the laser emission is Class 1M which indicates
that the laser beam is safe to look at with the unaided eye but must not be viewed using binoculars or other optical devices at a
distance of less than 0.5 meters. Notwithstanding the safety rating, avoid looking into the beam and switch the unit off when
working in the area.
CAUTION: The use of optical instruments with this product will increase eye hazard.
The LW20 should not be disassembled or modified in any way. The laser eye safety rating depends on the mechanical integrity of the
optics and electronics so if these are damaged do not continue using the LW20. There are no user serviceable parts and maintenance
or repair must only be carried out by the manufacturer or a qualified service agent.
No regular maintenance is required for the LW20 but if the lenses start to collect dust then they may be wiped with suitable lens
cleaning materials. Make sure that the LW20 is switched OFF before looking into the lenses.
Figure 28 :: Laser radiation information and labels
Appendix A :: Dimension drawings
Figure 29 :: Dimension drawings of the LW20 and SF20
Figure 30 :: Heat sink contact area
Specification
Value / AEL
Notes
Eye safety classification
Class 1M
Laser wavelength
905 nm
Pulse width
15 ns
Pulse frequency
10 kHz
Peak energy
160 nJ
Average power
< 1.2 mW
7 millimeter aperture
NOHD
0.5 m
Distance beyond which binoculars with may be used safely
26.5
32.1
16.4
29.9
LW20 SF20
LW20 / SF20 LiDAR - Product manual - Revision 9 | of | © LightWare Optoelectronics (Pty) Ltd, 2018 | www.lightware.co.za 22 28