Tech Briefs Magazine - May 2021 - PIT-13
modern systems, such as the Ophir
Helios Plus, also have a Profinet or an
Ethernet/IP interface. Using a thermal
measurement method, such devices can
determine laser powers up to 10 kW or
more in just a few seconds.
Even in very complex processes, such
as welding battery packs or manufacturing a fuel cell, the proactive measurement of laser power can be both fast and
precise. However, it should be noted that
measuring the laser power provides only
a first glimpse into more complex
processes.
In order to draw reliable conclusions
about the laser beam caustics, one
requires either a camera-based measurement system or a non-contact method for
measurement. Figure 3, left, shows a camera-based measuring device that must be
moved along the z-axis in order to find
the focus position by means of the determined beam profiles. Rapid changes in
the focus position are therefore difficult
to detect. On the right is a schematic representation of a non-contact measurement technology, which shows that the
caustic of the entire beam is recorded at
once. Here, a change in the focus position shows up immediately and is resolved in space and time.
Especially in the field of automated
production, non-contact measurement
of the laser beam proves to have a bright
future. In sensitive areas, such as the
manufacture of gearboxes or battery
packs, new products combine multiple
measurement methods in a single system.
In the Ophir BeamWatch Integrated system, for example, beam caustics can be
recorded using non-contact measurement technology; a water-cooled measuring head for high-power lasers determines the laser power; and the measurement data is passed on to the production network via integrated interfaces
(Profinet, Ethernet/IP, CC-Link, GigE).
Different welding heads and parameters can also be tested. By capturing
the beam at video frame rates, focus
shift can be detected in near real time,
as shown in Figure 4. Here, a dirty protective window was to blame for the
shift in focus.
Thanks to new innovations in measurement technologies, manufacturers and
users now have a wide range of options
for proactively measuring the laser
beam. Key laser parameters can be
recorded and adjusted quickly and accurately. This ensures that the process runs
under optimal conditions, that there are
no additional costs due to wasted energy
and materials, and that the products
manufactured meet the highest quality
requirements. Measurement technology
for the laser thus contributes significantly to sustainable production.
This article was written by Christian Dini,
Director Business Development, Ophir (North
Logan, UT). For more information, visit
http://info.hotims.com/79413-224.
The most trusted name in
precision laser processing.
For more than 40 years, Aerotech has set the standard
for long-term durability and accuracy in precision laser
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under the rigors of 24/7 laser production.
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applications than any other precision
automation company.
Visit aerotech.com/laser.
Greater Sustainability
Laser systems are central to a variety
of complex manufacturing processes.
©2021 Aerotech, Inc.
Photonics & Imaging Technology, May 2021
Free Info at http://info.hotims.com/79413-706
Cov
ToC
13
http://info.hotims.com/79413-224
http://info.hotims.com/79413-706
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Tech Briefs Magazine - May 2021
Table of Contents for the Digital Edition of Tech Briefs Magazine - May 2021
Tech Briefs Magazine - May 2021 - Intro
Tech Briefs Magazine - May 2021 - Sponsor
Tech Briefs Magazine - May 2021 - Cov1
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