9
g. Prevent that the laser accidentally rays surfaces such as
plane mirrors, metals and windows, especially the plane
mirrors and concave mirrors.
* The injurious distance refers to the maximum distance
between the source of the laser beams and the point where the
laser beams decay enough to not harm human beings. The
injurious distance of Class 3R/IIIa products is 1000 metres
(3300feet). As exceeding this distance(1000m=3300ft), the
laser intensity decays to that of Class 1, which would not injure
human eyes when looking directly into it.
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