Reliable laser technology by Phoenix Contact.
During laser marking, a focused laser beam is guided over the component to be marked. Depending on the material, there are various options for creating the contrast required with the base material.
As laser markings are made directly in the base material, they are very resistant. Individually adjusting the parameters to the material is crucial. Not all materials are suitable for laser marking.
Lasers are divided into two operating modes:
Lasers are specified based on the medium used: solid state and gas lasers. The active medium in solid state lasers are doped glasses or crystals. Foreign ions are included in a range of concentrations in the host crystal. These ions are available in a specified doping (concentration) level. Typical doping materials are neodymium, ytterbium, titanium, and erbium.
The fiber laser is one of the solid state lasers and, due to its compact design and ease of maintenance, is particularly well suited to marking. A typical fiber laser is the ytterbium-yttrium-aluminum-garnet laser.
Ytterbium-yttrium-aluminum-garnet lasers emit infrared radiation, so that the laser beam can be directed through fiber glass cables, in contrast to CO2 laser beams. Due to the short wave length, these lasers can be focused on a smaller surface, thereby achieving a higher resolution than a CO2 laser.
When working with lasers, dusts and gases can be generated. These must be removed from the processing room, to ensure quality remains consistently high. Extraction that suits the respective application is also necessary for occupational health reasons. In order to guarantee the highest possible degree of extraction, using a combination of different types of filters is recommended. A distinction is made between filters based on particle size:
In an ideal scenario, the air from the processing room is first of all pre-filtered using a range of fine particle filters. Then, in a second step, the smallest particles are also filtered from the air using a HEPA filter. In this way, an overall separation efficiency of over 99.9% can be achieved.
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