L-SOLUTION 100 Ex Fibre machine
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First contact
LASER Source
(diagram 2)
The LASER source receives power from the 48VDC power supply and its «trigger signal» from the CPU. When the LASER
system is powered on and the trigger signal comes from the CPU, this causes stimulated photon emissions that produces
an invisible, infrared light beam at a wavelength of 1065 nm.
The LASER beam exits the LASER tube through its output optics, passes through the beam window, bounces off the #1
and #2 mirror, and finally passes through the focus lens. The width of the LASER beam as it exits the source, called the
«Beam Diameter», is about 0.32 inch (8 mm). The focus lens focuses the beam into a very small spot whose «Spot Size»
is dependent on the «Focal Length» of the lens.
The «Focal Length» is the distance from about the center of the lens to the point where it converges the beam into the
smallest spot possible. Using a standard 3 inches (76,2 mm) focal length lens, the spot size produced is approximately
0.0012 inch (0,03 mm).
The «Focal Range» of the lens is very low, it is 0,5 mm. It corresponds to the interval in which we can obtain the smallest
size of point that is the biggest possible power density. Outside this interval, the size of the point increases what implies
that the power density decreases (linearly).
Shorter lenses produce a smaller spot size but also have a very narrow focal range. This means that they only would be
useful for engraving very flat objects. The longer lenses have a much wider focal range but also produce a larger spot size
which prevents from engraving fine details and from having an important power density. This can be related to trying to
write small text with a wide, felt tip marker. There are pros and cons to the different lenses that are available for different
applications. Please refer to the "Technical characteristics" section on available lenses and their operating characteristics.
System operation
0.3 mm
OPTICAL UNIT
(Mirror)
FIBER LASER SOURCE
FIBER LASER SOURCE
0.5 mm
