Operating Instructions Dplmagic Marker Dplgenesis ... - ACI Laser
Operating Instructions Dplmagic Marker Dplgenesis ... - ACI Laser
Operating Instructions Dplmagic Marker Dplgenesis ... - ACI Laser
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Detailed Advanced Information<br />
13.3 <strong>Laser</strong> beam quality<br />
The laser beam quality is a system constant of the laser beam<br />
source. It is a measure of the quality of the laser radiation.<br />
The laser beam quality is a function of the design of the laser. The<br />
so-called beam parameter product SF is used as a measure of the<br />
beam quality.<br />
The smaller the beam parameter product SF, the better the laser<br />
beam can be focused.<br />
The energy distribution over the cross-section of the laser beam is<br />
equally important for the beam quality.<br />
A basic operating mode (TEM oo) of the laser in which the energy<br />
distribution corresponds to a Gaussian function is ideal.<br />
In this case, the divergence of the laser is particularly small and the<br />
beam can be very well focused.<br />
Multimode laser Conventional laser beam sources emit a multimode beam. The<br />
energy is distributed randomly over the beam cross-section.<br />
The beam quality of multimode lasers can only be increased by<br />
using aperture or mode diaphragms.<br />
The diaphragms frequently reduce the power to 10% of the<br />
multimode power. In so doing, a TEM oo mode is only approximately<br />
achieved.<br />
The beam parameter product SF for the multimode laser is calculated<br />
according to the following formula:<br />
DPLMagic/Genesis/Nexus<br />
<strong>Marker</strong><br />
SF TEMxx = ϕ TEMxx · d m<br />
with SF Beam parameter product<br />
ϕ Divergence<br />
d Beam diameter<br />
The diode-pumped DPLMagic/Genesis/Nexus <strong>Marker</strong> laser system<br />
achieves direct generation of the basic mode by means of an<br />
ingenious resonator concept which eliminates the need for mode<br />
diaphragms. This guarantees the highest possible beam quality and<br />
the best focus.<br />
This provides the basic conditions for achieving the above average,<br />
high efficiency of the compact marker.<br />
The beam parameter product SF for the DPLMagic/Genesis/Nexus<br />
<strong>Marker</strong> is calculated according to the following formula:<br />
SF TEMoo = ϕ TEMoo · d o = λ / π<br />
with SF Beam parameter product<br />
ϕ Divergence<br />
d Beam diameter<br />
λ Wave length 1064 nm<br />
42 <strong>Operating</strong> <strong>Instructions</strong> DPLMagic/Genesis/Nexus <strong>Marker</strong> - 08/2006
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