Operating Instructions Dplmagic Marker Dplgenesis ... - ACI Laser

Detailed Advanced Information
Temperature stabilisation of
the resonator
The stability of the laser in respect of power and beam quality is
especially important for the reproducibility of inscriptions. The
DPLMagic/Genesis/Nexus Marker has therefore been equipped
with temperature stabilisation of the active laser medium. This
guarantees first class marking results even with very different power
settings or even after the laser has been on stand-by for a long time.
The temperature stabilisation of the laser crystal clearly reduced the
formation of the so-called "thermal lens".
This temperature stabilisation is also realised via a thermoelectric
module. As the resonator is very efficient, the module requires
significantly less power. The waste heat is conveyed out by means
of a fan.
13.5 The Materials Science of Laser Marking in Brief
The question of whether a material is suitable for laser marking can
generally be answered with yes, provided that it adequately absorbs
the processing wavelength, this is 1064 nm in the case of the
DPLMagic/Genesis/Nexus Marker.
Complex interactions take place between the laser beam and the
work piece during the marking procedure.
The workability of a material depends upon the following material
properties, among others:
• chemical composition,
• carbon content,
• spectral absorption,
• thermal conductivity,
• surface condition (dirt, structure, etc.).
The laser beam parameters also play a significant role.
These include:
• wave length,
• pulse frequency,
• pulse energy,
• peak pulse power,
• beam quality,
• focus diameter.
The large number of parameters show that the marking result
depends upon several influencing factors.
The following section is intended to give the user an insight into the
many possibilities for marking by means of a laser beam.
46 Operating Instructions DPLMagic/Genesis/Nexus Marker - 08/2006