15
DIRECT VIEW OF A LASER BEAM AFTER FOCUSING OPTICS
This can happen if the beam is not absorbed at the end of its path. This beam can be danger-
ous even if viewed over considerable distances. Filters and protective glasses can guarantee
the safety for short exposures, on the condition that they are well dimensioned and certified
to be safe for the relating wavelength.
VIEWING A DIFFUSED LASER BEAM AFTER FOCUSING THE OPTICS
This happens when using this machine. Viewing the diffused beam is not dangerous over a
short period of time, and viewing through a filter and lenses can guarantee safety, even dur-
ing long exposures..
THE NOMINAL OCULAR HAZARD DISTANCES (NOHD) FOR THE LZR LASERS IS LESS THAN 15M FOR
DIRECT OR SPECULAR REFLECTED RADIATION, AND LESS THAN 0.5M FOR THE DIFFUSED REFLEC-
TION. ONLY A SUITABLE WELD LENS WITH OPTICAL DENSITY GREATER THAN 4 CAN SUFFICIENTLY
PROTECT THE SIGHT FROM THE ACCIDENTAL VIEWING OF THE HARMFUL LASER RADIATION.
NOTE
Always use certified eye protection.
2.4: RISKS FOR THE EYES AND THE SKIN
The cornea and the retina can be burned and damaged, possibly irreversibly, if exposed to an intense
laser radiation, regardless of duration. Also, exposure to a less intense laser radiation over a long du-
ration, can result in similar dangerous and possibly irreversible outcomes. This danger is completely
realistic in any case of direct vision of any laser beam.
Skin can also burn, if submitted to the focused direct radiation. In addition to focused direct exposure,
exposure to ultraviolet radiation over time can also cause negative consequences to skin.
2.5: SAFETY GENERAL PRESCRIPTIONS
We recommend developing a Standard Operating Procedure (SOP) to follow when operating and ser-
vicing the machine. A written copy of this procedure should be easily accessible to any operator using
the machine. Training and review of the process over time is recommended as well to ensure:
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