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Publications

Proceedings of SCMT5 2019 London 

Material characterization via contact-free detection of surface waves using an optical microphone

Authors:

Wolfgang Rohringer, Nils Panzer, et al.

Contents:
  • Single-sided non-contact measurements of a spot-welded steel plate, an aluminium plate and on a sandstone sample
  • The results demonstrate the ability of XARION's technology on a wide range of surfaces and materials
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Bachelor Thesis University Ravensburg-Weingarten 

Acousto-optical Process Control for Laser Ablation and Laser Welding

Authors:

Chen Peng

Contents:
  • The optical microphone has proven effective and invaluable as a measurement instrument during laser processes.
  • The measurements obtained are useful in:
    • the automated calibration of the optimum focus spot of a laser beam,
    • controlling the laser ablation quality in a production line without modifying the workpiece, and
    • identifying keyhole formation (or lack thereof) during laser welding processes. 
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LASER 06/2019

Akustische Überwachung für die Lasermaterialbearbeitung (German)

Authors:

Christian Schröter, Ryan Sommerhuber, et al.

Contents:
  • Contact-free monitoring of laser welding, cutting and structuring
  • Real-time determination of ideal focus position and unwanted zinc contamination
PDF

Proceedings of DAGA 2019 Rostock  

Air-Coupled Ultrasonic Inspection of Fiber-Reinforced Plates Using an Optical Microphone

Authors:

Janez Rus, David Kulla, et al.

Contents:
  • Inspection of  fiber-reinforced plates with the optical microphone and classical air-coupled ultrasound devices
  • Result: the XARION technology shows a better spatial resolution than state-of-the-art piezoelectic receivers
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Ceramic Industry 02/2019

Non-Contact Ultrasound Diagnostics for the Ceramic Industry

Authors:

Fabian Lücking

Contents:
  • Detection of tiny cracks in ceramic workpieces with the help of XARION's optical microphone
  • Monitoring of acoustic emissions without the need for physically contacting the workpiece 
PDF

Composite Structures 12/2018

Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound

Authors:

Balthasar Fischer, Fabrizio Sarasini, et al.

Contents:
  • Joint publication of XARION, Airbus Operations S.A.S, Università di Roma and CNRS-ENSMA
  • Superior inspection resolution was achieved with the optical microphone and laser-based excitation
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Elektrotechnik und Informationstechnik 11/2018

Development of an innovative measurement system for audible noise monitoring of overhead lines

Authors:

U. Schichler, W. Troppauer et al.

Contents:
  • Audible noise monitoring of overhead lines with XARION's optical microphone
  • Operation in proximity of high electric fields without interferences 
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Structual Control Health Monitoring Journal 03/2019

Online cracking detection by means of optical techniques in laser‐cladding process

Authors:

Aitor García de la Yedra, Michael Pfleger, et al.

Contents:
  • This paper shows that XARION’s sensor technology can be used for the in-process monitoring of a laser-cladding process.
  • Comparison of the optical microphone against other online monitoring systems for laser cladding processes 
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Proceedings of DAGA 2018 München 

Ultrasound inspection of spot-welded joints

Authors:

Wolfgang Rohringer, Thomas Heine, et al.

Contents:
  • Joint publication of XARION with PORSCHE Leipzig GmbH, presented at the DAGA Conference 2018
  • Spot weld characterization in steel, with a single-sided NDT setup using XARION's optical microphone
PDF

Optics Letters 11/2017

Dual modality reflection mode optical coherence and photoacoustic microscopy using an akinetic sensor

Authors:

Richard Haindl, Stefan Preisser, et al.

Contents:
  • The optical microphone was used as a part of a novel optical coherence and photoacoustic microscopy system (OC-PAM)
  • The OC-PAM system was applied to image a zebrafish larvae in vivo, demonstrating its capability in biomedical imaging
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