5
However, in this case the following requirements apply to the protective cover:
·
The protective cover must be appropriate to adequately shield the laser
radiation. It is therefore necessary to use laser safety glass or laser safety
film for viewing windows.
·
The cover itself as well as any doors or flaps in the cover must be protected
using the interlock circuit that automatically shuts down and inhibits the laser
immediately on intentional or unintentional opening.
If the interlock circuit is disabled for service or maintenance work on the system with
the cover open, the laser area is enlarged again and the regulations in the next section
«Presence of persons in the laser area» apply.
Presence of persons in the laser area
In the laser area, people are subject to hazards, in particular ocular. Therefore the
follow ing measures must be taken and the following safety regulations observed:
·
The room must have an emergency exit.
·
The room must be optically screened from the environment (e.g. laser safety
film on the windows).
·
The laser area is to be kept as small as possible, to be bounded by suitable
screening and protected against access by unauthorized persons. The num
-
ber of persons in the laser area should be reduced to the minimum.
·
There must be a warning device on all entrances to the room that indicates
the laser radiation hazard.
·
If the entry doors are not protected using the interlock circuits, opening the
doors easily from the outside must be impossible to prevent thoughtless
entry.
·
All persons who are in the laser area during operation must be informed
about the dangers of the laser radiation.
·
Laser safety glasses/goggles must be worn in the laser area. The operating
organisation must ensure that suitable safety glasses/goggles are available.
The glasses/goggles are selected in accordance with DIN EN 207. Please see
the data sheet on the unit for the actual wavelength of your laser. Herein
-
after, the term safety glasses is always used to refer to suitable laser safety
glasses/goggles.
Caution:
in some circumstances your laser safety glasses/
goggles may not protect you from a powerful red pilot beam.
·
There must not be any potentially explosive substances in the laser area.
Easily inflammable substances may catch fire.
·
Glossy reflective equipment must be either removed from the laser area or
covered. Windows and reflecting walls are also to be covered with material
with low inflammability.
