Dr. Bernd Köhler Profile

Dr. Bernd Köhler

Working Group Manager at Fraunhofer IKTS-MD

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Author

Publications (17)

Proceedings Article | 18 April 2022 Presentation + Paper

Non-contact vibration analysis for detection of geometric deviations and defects: example of a ceramic solid-state electrolyte for energy storage applications

Kilian Tschöke, Sergey Gartsev, Mareike Stephan, Bernd Köhler

Proceedings Volume 12049, 120490D (2022) https://doi.org/10.1117/12.2613049

KEYWORDS: Ceramics, Modal analysis, Vibrometry, Visualization, Finite element methods, Solid state electronics, Shape analysis, Nondestructive evaluation, Laser cutting, Doppler effect

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Proceedings Article | 16 September 2014 Paper

Design, technology, and application of integrated piezoresistive scanning thermal microscopy (SThM) microcantilever

Paweł Janus, Piotr Grabiec, Andrzej Sierakowski, Teodor Gotszalk, Maciej Rudek, Daniel Kopiec, Wojciech Majstrzyk, Guillaume Boetsch, Bernd Koehler

Proceedings Volume 9236, 92360R (2014) https://doi.org/10.1117/12.2066240

KEYWORDS: Silicon, Sensors, Wheatstone bridges, Optical lithography, Microscopy, Electronics, Platinum, Semiconducting wafers, Bridges, Amplifiers

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Proceedings Article | 11 April 2013 Paper

Polarization control in optical fibers and applications in optical microscopy and spectroscopy

Christoph Zeh, Rico Illing, Bernd Köhler, Jörg Opitz, Lukas Eng, Thomas Härtling

Proceedings Volume 8693, 86930Q (2013) https://doi.org/10.1117/12.2009585

KEYWORDS: Acoustics, Polarization, Optical microscopy, Wave propagation, Electroluminescent displays, Microscopy, Transducers, Optical spectroscopy, Signal detection, Spectroscopy

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Proceedings Article | 9 April 2010 Paper

Wave field characterization for non-destructive assessment of elastic properties using laser-acoustic sources in fluids and eye related tissues

T. Windisch, F. Schubert, B. Köhler, E. Spörl

Proceedings Volume 7650, 76503J (2010) https://doi.org/10.1117/12.848449

KEYWORDS: Eye, Tissues, Acoustics, Laser vision correction, Cornea, Wave propagation, Pulsed laser operation, Interfaces, Diagnostics, Ultrasonics

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Proceedings Article | 9 April 2010 Paper

Comparison of guided wave sensors for SHM sensor networks

T. Windisch, B. Köhler, N. Meyendorf

Proceedings Volume 7648, 76480V (2010) https://doi.org/10.1117/12.848743

KEYWORDS: Transducers, Structural health monitoring, Waveguides, Wave plates, Sensors, Wave propagation, Sensor networks, Signal generators, Scattering, Acoustics

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Proceedings Article | 28 May 2009 Paper

Characterization of nano-thin films and membranes by use of atomic force acoustic microscopy methods

Malgorzata Kopycinska-Mueller, Andre Striegler, Bernd Köhler, Norbert Meyendorf, Klaus-Jürgen Wolter

Proceedings Volume 7364, 736403 (2009) https://doi.org/10.1117/12.821426

KEYWORDS: Silicon, Atomic force microscopy, Thin films, Silicon films, Oxides, Microscopy, Fused quartz, Acoustics, Defect detection, Ultrasonics

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Proceedings Article | 13 April 2007 Paper

Visualization of buried structures in atomic force acoustic microscopy

André Striegler, Bernd Köhler, Beatrice Bendjus, Nagamani Pathuri, Norbert Meyendorf

Proceedings Volume 6528, 65281B (2007) https://doi.org/10.1117/12.716863

KEYWORDS: Atomic force microscopy, Microscopy, Acoustics, Ultrasonics, Ion beams, Visualization, Scanning probe microscopy, Nondestructive evaluation, Ultrasonography, Silicon

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Proceedings Article | 4 April 2006 Paper

Nanomaterials produced by laser ablation techniques. Part I: Synthesis and passivation of nanoparticles

P. Murray, B. Koehler, S. Lipfert, J. Kaspar, J. Schreiber

Proceedings Volume 6175, 61750D (2006) https://doi.org/10.1117/12.660728

KEYWORDS: Nanoparticles, Silicon, Transmission electron microscopy, Particles, Iron, Laser ablation, Argon, Photomicroscopy, Nondestructive evaluation, Nanomaterials

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Proceedings Article | 4 April 2006 Paper

Determination of deformation fields by atomic force acoustic microscopy

Beatrice Bendjus, Bernd Köhler, Henning Heuer, Ute Rabe, André Striegler

Proceedings Volume 6175, 617509 (2006) https://doi.org/10.1117/12.659016

KEYWORDS: Atomic force microscopy, Ultrasonics, Acoustics, Microscopy, Transducers, Sensors, Surface finishing, Ultrasonography, Silicon, Image sensors

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Proceedings Article | 4 April 2006 Paper

Nanomaterials produced by laser ablation techniques. Part II: High spatially resolved nondestructive characterization of nanostructures

Bernd Koehler, Paul Murray, Eunsung Shin, Sebastian Lipfert, Juergen Schreiber

Proceedings Volume 6175, 61750C (2006) https://doi.org/10.1117/12.660463

KEYWORDS: Scanning electron microscopy, Particles, Transmission electron microscopy, Atomic force microscopy, Nanoparticles, Scanning tunneling microscopy, Laser ablation, Silicon, Iron, Diffusion

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Proceedings Article | 16 March 2006 Paper

Acoustic thermography using an uncooled high-speed camera and low-power ultrasonic excitation: test system and its application to impact flaw detection in CFRP

Lothar Haupt, Manfred Zimmerhackl, Norbert Meyendorf, Bernd Köhler

Proceedings Volume 6179, 617903 (2006) https://doi.org/10.1117/12.660766

KEYWORDS: Ultrasonics, Thermography, Actuators, Cameras, Acoustics, Imaging systems, High speed cameras, Nondestructive evaluation, Infrared cameras, Infrared radiation

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Proceedings Article | 9 May 2005 Paper

Numerical time-domain simulation of wave propagation and scattering in acoustic microscopy for subsurface defect characterization

Frank Schubert, Bernd Koehler, Pavel Zinin

Proceedings Volume 5766, (2005) https://doi.org/10.1117/12.602070

KEYWORDS: Zinc, Acoustics, Transducers, Solids, Microscopy, Computer simulations, Microscopes, Wave propagation, Interfaces, Microfluidics

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Proceedings Article | 9 May 2005 Paper

Application of photo and particle acoustic methods

Bernd Koehler, Frank Schubert, Gert Hentges, Norbert Meyendorf

Proceedings Volume 5766, (2005) https://doi.org/10.1117/12.602329

KEYWORDS: Acoustics, Scanning electron microscopy, Electrons, Particles, Ions, Sensors, Photons, Microscopy, Electron microscopes, Amplifiers

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Proceedings Article | 21 July 2004 Paper

Materials characterization of micro-devices

Jürgen Schreiber, Beatrice Bendjus, Bernd Köhler, Valeri Melov, Tilo Baumbach

Proceedings Volume 5392, (2004) https://doi.org/10.1117/12.570272

KEYWORDS: Resistance, Aluminum, Atomic force microscopy, Electroluminescence, Microopto electromechanical systems, Ion beams, Copper, Tantalum, Chromium, Material characterization

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Proceedings Article | 21 July 2004 Open Access

Micro- and nano-NDE in the laboratory for acoustic diagnosis and quality assurance

Bernd Koehler, Juergen Schreiber, Beatrice Bendjus, Martin Herms, Valeri Melov, Lukas Helfen, Petr Mikulik, Tilo Baumbach

Proceedings Volume 5392, (2004) https://doi.org/10.1117/12.541652

KEYWORDS: Scanning electron microscopy, Acoustics, X-rays, Nondestructive evaluation, Mirrors, Semiconducting wafers, Microscopy, X-ray diffraction, Silicon, X-ray imaging

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Proceedings Article | 8 October 2001 Paper

Microgripper construction kit

Ulrich Gengenbach, Andreas Hofmann, Friedhelm Engelhardt, Rudolf Scharnowell, Bernd Koehler

Proceedings Volume 4568, (2001) https://doi.org/10.1117/12.444137

KEYWORDS: Actuators, Interfaces, Sensors, Adhesives, Prototyping, Integration, Connectors, Manufacturing, Optics manufacturing, Cameras

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Proceedings Article | 10 March 1999 Paper

Production of movable metallic microstructures by aligned hot embossing and reactive ion etching

Oliver Roetting, Bernd Koehler, Frank-Joachim Reuther, Hartmut Blum, Walter Bacher

Proceedings Volume 3680, (1999) https://doi.org/10.1117/12.341173

KEYWORDS: Reactive ion etching, Etching, Sensors, Polymers, Image processing, Cameras, Digital image processing, Polymethylmethacrylate, Oxygen, Visualization

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Showing 5 of 17 publications

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