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Publications

Springer 03/2022

Handbook of Nondestructive Evaluation 4.0

Authors:

Norbert Meyendorf, Nathan Ida, et.al.

Contents:
  • This handbook is a comprehensive overview of advanced NDE technologies for use in many different industrial applications
  • XARION is represented with a chapter on its innovative automated spot-weld inspection technology
Link

Composite Structures 05/2022

Effect of basalt intraply hybridization on the damage tolerance of flax laminates: Experimental analysis and analytical modeling under low-velocity impact

Authors:

Elena Raponi, Balthasar Fischer, Josef Pörnbacher et. al.

Contents:
  • Flax, basalt, and hybrid flax/basalt/epoxy composites were subjected to low velocity impact tests to study their toughness
  • The samples were subsequently investigated using XARION’s contact and couplant-free Laser Excited Acoustics (LEA) method
  • The LEA method allowed detection and quantitative assessment of internal damages in the different composites
Link

Tech Briefs 09/2021

Monitoring Additive Manufacturing with an Optical Microphone

Authors:

Martin Ursprung, Ryan Sommerhuber, et.al.

Contents:
  • XARION’s ultrasound sensor enables process monitoring of Additive Manufacturing processes
  • Defects such as the formation of cracks can be detected during Laser Metal Deposition and Powder Bed Fusion processes
  • Critical process parameters can be observed during Wire Arc Additive Manufacturing
PDF

Applied Optics 08/2021

Depixelation of coherent fiber bundle imaging by fiber-core-targeted scanning

Authors:

Qian Li, Wolfgang Rohringer, et.al.

Contents:
  • A novel method, called Fiber-core-targeted scanning (FCTS), is demonstrated to remove the pixelation artefacts on Fiber-Bundle based laser scanning Photoacoustic Imaging
  • This method is enabled by a XARION hydrophone, which acts as a highly sensitive detector in a fiber-coupled photoacoustic probe suited for future Laparoscopic applications
  • For further information concerning the article please contact us
Link

Materials & Design 08/2021

Mutual comparison of acoustic, pyrometric and thermographic laser powder bed fusion monitoring

Authors:

Kai Gutknecht, Michael Cloots, et. al.

Contents:
  • The process monitoring capabilities of three distinctive sensors (XARION’s optical microphone, a pyrometer and a thermographic camera) were compared for laser powder bed fusion metal additive manufacturing
  • The optical microphone presents a sensitivity up to 40 times higher than the thermographic camera and is 15 times more sensitive than the pyrometer
PDF

Materials Evaluation 01/2021

Laser-Excited Acoustics for Contact-Free Inspection of Aeropace Composites

Authors:

Matthias Brauns, Fabian Lücking, et. al.

Contents:
  • XARION published an article in “Materials Evaluation” together with Northrop Grumman Corp. introducing LEA NDT, Laser-Excited Acoustics for contact-free inspection of aerospace composites
  • LEA is a novel and fast ultrasound scanning technique with properties that make it an affordable couplant-free alternative for NDT of a variety of aerospace composite materials
  • For further information concerning the article please contact us
Link

Proceedings of IEEE International Ultrasonics Symposium 2020 Las Vegas 09/2020

Polymer-based piezoelectric ultrasound transducer arrays on glass demonstrating mid-air applications

Authors:

Christopher Chare, Pieter Gijsenbergh, et. al.

Contents:
  • The acoustic field of an ultrasound transducer array was measured using XARION's technology in order to characterize the performance of the array
  • With a measured acoustic focal pressure of 300 Pa (144 dB rel. 20µPa) at 256 kHz, 10 mm above the surface, IMEC opens up the possibility of future mid-air haptic feedback applications for large-area thin-film displays
PDF

Proceedings of IEEE Sensor 2020 Rotterdam 10/2020

Enhanced non-contact ultrasonic testing using an air-coupled optical microphone

Authors:

Georg Kaniak, Wolfgang Rohringer, et. al.

Contents:
  • Contact-free scan of a fully packaged chip (Hall sensor) with the optical microphone
  • Evaluation of small ceramic parts by air-coupled measurement of acoustic response to a laser pulse
PDF

Ultrasonics 09/2020

Thickness measurement via local ultrasonic resonance spectroscopy

Authors:

Janez Rus, Christian U. Grosse

Contents:
  • Local mechanical response to laser-induced ultrasound was recorded with XARIONs optical microphone in order to measure the thickness of a carbon fiber-reinforced polymer plate
  • The precision of this arrangement greatly exceeded the precision of conventional methods due to the unique frequency bandwidth of the optical microphone
PDF

Proceedings of LANE 2020 Erlangen 

In situ process monitoring by optical microphone for crack detection in Laser Metal Deposition applications

Authors:

Camilo Prieto, Roberto Fernandez, et.al.

Contents:
  • Contact-free crack detection in Laser Metal Deposition (LMD) applications in collaboration with AIMEN successfully documented
  • XARION’s optical microphone, Eta250 Ultra, enabled real-time monitoring of crack and process signals of additive manufacturing applications
PDF