IM Machine Name Rev.: END 9
Protection of the Eyes against Laser Radiation
Devices on the equipment that guarantee complete eye protection of the operator and
other people in the vicinity of the welding laser system:
Safety Beam Shutter
The safety beam shutter prevents the generation of laser pulses or the unwanted
emission of laser radiation from the laser beam source and is closed
– When there is no control voltage applied to it,
– When it delivers no or an incorrect status message to the control system.
Release of the Laser Pulse
The release of the laser pulse takes place only when
– the setting of the laser nominal values has been completed
– the recharging of the energy reservoir has been completed
– the foot switch has been pressed down.
Other Devices for Eye Protection:
– a large observation window in laser protection polymer for the safe direct
observation of the welding operation.
– automatic UV and glare protection in the beam path of the stereo microscope is
activated during the welding.
– the entire laser beam path is optically sealed towards the outside.
The device fulfils all the conditions for complete eye protection.
Thereby, the single condition for laser Class I is satisfied.
Protection of the Skin against Laser Radiation
The protection of the skin against laser radiation cannot be process-relatedly
completely ensured as hands need to be put in the danger area.
The device is intended for use in dental laboratories, in goldsmiths‘ workshops and
many other workshops and laboratories.
The operating procedure cannot be automated as every workpiece is an individual
item. Manual work is necessary as a large number of the most diverse materials with
different dimensions, outward forms, surface qualities, fit tolerances, electrical,
mechanical and thermal properties must be joined with each other in various
combinations or must be surface-treated.
Laser radiation protective gloves are generally speaking very cumbersome and only
suitable for rough welding work. The same applies to the use of holders, tweezers,
etc. Therefore, this device must be classed as work equipment for manual work from
which the risk of minor injuries can occur.
Due to the equipment design, the danger area is restricted to the hands of the
operator only. Through exposure to laser radiation, localized burn injuries to the skin
tissue can occur in the event of incorrect operation.
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