In terms of physics, the principle of operation is quite complex. To simplify it as much as possible, the pump diode generates radiation with a wavelength of 808 nm, which then passes through a series of crystals and reflectors that convert this wavelength first to 1064, then to 532 and finally to 355 nm.
Much more important is how the principle of operation affects the result and what features and capabilities these machines have, besides being able to process almost any material.
The beam diameter of a UV marker is approximately three times smaller than that of a conventional fiber laser.
The shorter wavelength gives a smaller laser beam diameter, which means more detailed images and, most importantly, a much smaller heat affected area with a higher power density. This means that materials will not overheat, deform, burn or crack. The UV marker changes the properties of the material without destroying it – this is the marking, it is also possible to make ablation of various materials and oxidation of metals. The latter makes it possible to apply coloured images to metals.
Due to its relatively low power, the UV laser marker is suitable for marking, not engraving.
