• Laser deep
prototyping, rapid tooling
• 3D work piece
focusing units of the LSSL-DNF series enable exceptionally precise,
high-performance positioning of the laser focus along the optical axis.
In XY scan
systems this unit can replace costly flat field objectives. Therefore, the
unit is an ideal solution in applications for which standard flat field
objectives are unavailable. The LSSL-DNF series can also extend XY scan
systems into 3D beam deflection systems. The laser focus is guided along the
contour of the work-piece being processed, thus enabling processing in three
dimensions. The dynamic focusing unit additionally allows continuously
adjusting the image field size, working distance and spot size. The high-end
member of the LSSL-DNF series of focusing units is equipped with a digital
series offers double the maximum travel of previous product and much lower
tracking error, resulting in a larger focus-shift range and better spot
quality. Its accuracy, speed, resolution and linearity, too, are clearly
superior to those of all other units, while substantially eliminating the
effects of drift. In addition, this unit delivers all advantages of driving
technology: extensive flexibility, high dynamic performance, real-time
querying of actual position and other status parameters, etc.
How it Works
scanning process, a diverging optic in this module is positioned with high
dynamics along the optical axis with respect to a stationary focusing optic.
This produces a change in the system’s overall focal length, synchronized
with the mirror motion. The dynamic focusing unit can thereby expand 2D scan
systems into 3-axis scan systems. In 2D applications, this module can
replace costly flat field objectives. In 3D beam deflection systems it
enables processing in three dimensions.
optic of the LSSL-DNF-40F is motor-driven, enabling continuously variable
image field sizes and working distances. The LSSL-DNF-40F housing contains
all optical components and the electronics. For scan systems with apertures
exceeding 40 mm, we offer LSSL-DNF-60, 60I, 80 and 80I and the LSSL-DNF-FC.
focusing unit is equipped with a digital standard interface and is easily
controlled – even synchronously with a 2D PC-based interface board scan
system. The module is available for digital and analog-based control.
dynamic focusing unit and the whole scan system – optical configurations for
a wide variety of working distances, image field sizes, beam diameters,
wavelengths and laser powers for optimally tuning the system to the
customer’s particular application. Thus, a maximum image field size is
achieved with the minimum spot size.
LSSL-DNF-40 and LSSL-DNF-40I allows the customer to self-install various
exchangeable optics sets. Their integrated air and water cooling ensure
operation at very high laser powers. The LSSL-DNF-20I is equipped with a
water-cooled entrance aperture.