Prof. Richard Kowarschik
Institute of Applied Optics & Biophysics, Friedrich-Schiller-University Jena, Germany
Title: 3D shape measurement with
structured light using statistical patterns
Abstract: Optical 3D shape
measurement methods like fringe projection play a
significant role in industrial metrology and in many
other areas of science and technology. In addition,
methods that work with the projection of statistical
patterns are becoming increasingly important.
Statistical patterns can be generated more easily and
usually also projected faster, so that the measurement
speed is no longer limited by the projection system. An
important example is the combination of
stereophotogrammetry with the projection of statistical
patterns like incoherent band-limited or coherent
patterns (laser speckles). Since the statistical
patterns do not need to be known in terms of their
actual structure, new projection methods are possible.
Laser speckles offer the advantages of high contrast and
spectral narrowband. One key point for the further
development of these 3D measurement methods is the
inspection of objects that behave uncooperatively in the
visible spectral range (VIS) by the transition to IR or
UV wavelengths. Another is the realization of more
compact and miniaturized setups based on single-camera
systems in combination with the repeatable projection of
the patterns. Moreover, the successful establishment of
these 3D measurement methods requires a precise
characterization of their parameters and the comparison
with established shape measurement methods.
Biodata: TBA
Prof. Daniel Claus
Swiss Optic Group AG, Switzerland
Title: Ultra-high speed MHz optical metrology applied to uncooperative technical and medical samples
Abstract: This talk will deal with
various optical metrology techniques for the estimation
of the 3D topography for industrial and medical
applications.
The information provided via optical metrology must
fulfill a large range of boundary conditions such as
optical resolution, height measurement uncertainty,
measurement speed and measurement sample including the
measurement environment.
The technologies, which will be discussed in this
presentation are focused on ultra-high speed 3D
topographic metrology systems offering data rates of a
few Mhz. It will be demonstrated that these systems work
well at harsh environmental conditions such as
manufacturing workshop or as a handheld device in
clinical applications (continuously changing reference
coordinate system). Moreover, the difference in samples,
such as technical metallic surface that are solely
specular reflective and surface scattering or
semitransparent biomedical samples, which are volume
scattering, significantly influences the choice of
metrology technique.
With regards to the boundary conditions and application
scenario different metrology systems will be presented
based on chromatic confocal point sensors, chromatic
confocal multi point sensors and single shot dual
wavelength area sensor.
All of which are perfectly suited for their specific
task, which will be highlighted within the presentation.
Biodata: Daniel Claus finished his
master’s degree in mechanical engineering at the
Technische Universität (TU) Ilmenau in 2006. After a
short spell as a scientific assistant at the TU-Ilmenau,
he started his PhD at the University of Warwick (UK) in
2007.During his PhD he focused on resolution improvement
methods applied to digital holographic interferometry
for metrology and medical applications. After finishing
his PhD in 2010 he started a postdoc position at the
Kroto research institute in Sheffield, where he was
working on phase retrieval imaging and in particular
ptychography. From 2013 to 2017 he got the position of a
senior scientist at the Institut für Technische Optik
(ITO) at the Universität Stuttgart, working on
elastography, adaptive chromatic confocal multipoint
imaging, waveoptical signal modelling and coherent
imaging. In 2017 he moved to the Institut für
Lasertechnologien in der Medizin und Messtechnik in Ulm,
where he was leading the optical metrology group. His
work there was predominately focused on high-speed
imaging based on interferometry and chromatic confocal
imaging in an industrial context. Since 2022 he holds
the position of a project leader and systems engineer at
Swiss optics, developing optical systems for medical
applications.
Dr. Alexander Bertz
Gruppenleiter Geometrische Inline-Messsysteme
stellv. Abteilungsleiter Produktionskontrolle
Fraunhofer IPM, Germany
Title: Digital Holography - A highly versatile technology for 3D measurement
Abstract: The demands on modern
quality assurance - and therefore on metrology - are
immense. Measuring tasks are becoming more and more
complex, while at the same time shorter measuring times
and higher inspection rates are required.
Optical measuring methods offer flexibility, high
measuring speeds and the possibility of comprehensive
measurements - especially when it comes to measuring
precisely manufactured surfaces or detecting the
smallest defects on large surfaces. In recent years, the
Fraunhofer Institute for Physical Measurement Techniques
IPM has shown that digital holography in particular
offers superior potential. With a sampling rate of > 300
million points/s (area measurement), single point
repeatability of significantly better than 1 µm can be
achieved even under production conditions.
In this talk we will give a short introduction to
digital holography and present the current status of
digital holographic sensor technology for industrial
quality assurance using real-life examples.
Biodata: Alexander Bertz was born
in Heidelberg in 1980 and studied physics at the
Technical University of Darmstadt. He received his
diploma in physics in 2005. He received his PhD from the
Technical University of Darmstadt in 2010 for his work
on a novel detector setup for hydrogen dimers for the
realisation of a loophole-free Bell experiment. Since
2011 he has been working at the Fraunhofer Institute for
Physical Measurement Techniques IPM in Freiburg. For the
first successful integration of a holographic
measurement system into a production line, he was
awarded the Joseph von Fraunhofer Prize in 2017. He is
currently head of a group specialising in the
development of innovative 3D measurement systems
primarily based on digital holography and deputy head of
the production control department.
Speakers in 2025 to be announced soon......