Abstract
In this review paper, conventional non-destructive testing (NDT) methods are briefly introduced and compared with selected examples for applications of optical coherence tomography (OCT) for NDT. The contactless, non-destructive and purely optical method enables multi-dimensional imaging for tomographic real-time evaluation in various fields of application. Depending on the material, penetration depths of several millimeters can be achieved, thus providing an attractive solution that can be used both as a stand-alone and as a process-integrated solution.
Zusammenfassung
In diesem Review-Paper werden konventionelle zerstörungsfreie Prüfverfahren kurz vorgestellt und mit der optischen Kohärenztomographie (OCT), anhand ausgewählter Beispiele verglichen. Das kontaktlose, zerstörungsfreie und rein optische Verfahren ermöglicht mehrdimensionale Aufnahmen zur tomografischen Echtzeit-Evaluation in verschiedenen Anwendungsfeldern. Dabei werden Eindringtiefen, je nach Material von mehreren Millimetern erreicht und so eine attraktive Lösung bereitgestellt, die als Standalone-Verfahren genauso wie als prozessintegrierte Lösung genutzt werden kann.
About the authors
Mr. Fabian Zechel, studied computational engineering science at RWTH Aachen University, Germany. During his studies he worked as student worker at Fraunhofer IPT and started working as a research fellow in the department of production metrology in March 2019 after receiving his Master degree. The main field of his current research for both student worker and research fellow lies in the development of software components for controlling and evaluation of OCT for biomedical and technical applications.
Mr. Rouwen Kunze, studied biomimetics and product development at Westphalian University of Applied Science and Aachen University of Applied Science. During his studies he worked as student worker at Fraunhofer IPT and started working as a research fellow in the department of production metrology in January 2016 after receiving his Master degree. The main field of his current research for both student worker and research fellow lies in the development of measurement systems for laser machining applications with focus on low coherence interferometry.
Niels König is the head of the Department Production Metrology at Fraunhofer Institute for Production Technology IPT, Germany. He received his diploma in physics in 2007 from RWTH Aachen University, Germany. He has published more than 50 papers in international peer-reviewed journals and conference proceedings. His research is focused on fiber-optical sensors and applications in low-coherence interferometry and optical-coherence tomography, in particular.
Prof. Dr.-Ing. Robert Schmitt, is head of the Chair of Metrology and Quality Management and member of the board of directors for the Laboratory for Machine Tools and Production Engineering WZL of the RWTH Aachen University. He is also head of the department Production Metrology and Quality of the Fraunhofer Institute for Production Technology IPT as well as member of the board of directors of the Fraunhofer IPT.
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