Safety
2.8.4
Information about damaged optics
Warning
Damage to optics.
Soiled optics absorb laser radiation and can thus be destroyed. Broken or damaged lenses as
well as thermal decomposition of lenses release particles which cause serious damage to the
health.
– The passive reflectors and optics in the area of the laser beam guidance should be cleaned
regularly.
– Special care is required when handling, attaching and cleaning these elements.
– Do not exert non-uniform pressure.
– Do not use tools or hard objects to clean the surface.
– Never touch the optics with your bare fingers.
– Never use cleaning tissues twice.
– When lenses get broken, damaged or thermal decomposed follow the protective measures.
– Disposal according to regulations and laws valid in the user's country.
–
Lenses with scratches or lenses with penetrations must not be used anymore!
Scratched or destroyed lens surface
Be aware that scratches in the coating may release small quantities of thorium, which may be harmful upon
inhalation or swallowing.
Thermal decomposition
Upon thermal decompositions, vapors of selenium oxide and zinc oxide are formed. Upon inhalation or
swallowing there is danger of poisoning. Indicators for thermal decomposition of ZnSe include deposits in the
form of red or white powder and an unpleasant odor.
Broken lenses
When optical components of zinc selenide (ZnSe) are destroyed, toxic dusts and vapors are formed which
must not be inhaled. The dust can additionally cause irritations of the eyes, skin and respiratory tract. If a
lens has been destroyed during operations, care is to be taken during removal and cleaning.
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