Dr. Volker Kebbel Profile

Dr. Volker Kebbel

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Publications (16)

Proceedings Article | 7 March 2006 Paper

Detection and compensation of misalignment for interferometric diagnostic tools applied in space-borne facilities

Volker Kebbel, Hans-Juergen Hartmann, Werner Jueptner, Ulf Schnars, Laura Gatti, Joachim Becker

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498398

KEYWORDS: Wavefronts, Interferometers, Interferometry, Sensors, Optical components, Diagnostics, Holographic interferometry, CCD cameras, Error analysis, Mirrors

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Proceedings Article | 7 March 2006 Paper

Characterization of micro-optics using digital holography

Volker Kebbel, Hans-Juergen Hartmann, Werner Jueptner

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498397

KEYWORDS: Holograms, 3D image reconstruction, Digital holography, Wavefronts, CCD cameras, Lenses, Microlens, Interferometry, Fourier transforms, Micro optics

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Proceedings Article | 13 June 2005 Paper

Characterisation of high-density particle distributions for optimisation of laser cladding processes using digital holography

Volker Kebbel, Jurgen Geldmacher, Knut Partes, Werner Juptner

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.612531

KEYWORDS: Particles, Cladding, Digital holography, Holograms, Laser processing, Holography, CCD cameras, 3D image reconstruction, Wavefronts, Particle image velocimetry

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Proceedings Article | 8 June 2005 Paper

Recent advances in thin-film microoptics

R. Grunwald, U. Neumann, U. Griebner, G. Stibenz, S. Langer, G. Steinmeyer, V. Kebbel, M. Piche

Proceedings Volume 5827, (2005) https://doi.org/10.1117/12.604866

KEYWORDS: Thin films, Micro optics, Chemical elements, Axicons, Dielectrics, Reflectivity, Wavefront sensors, Beam shaping, Vacuum ultraviolet, Wavefronts

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Proceedings Article | 16 November 2004 Paper

Truncated ultrashort-pulse small-angle Bessel beams

Ruediger Grunwald, Uwe Neumann, Gero Stibenz, Stefan Langer, Günter Steinmeyer, Volker Kebbel, Jean-Luc Néron, Michel Piché

Proceedings Volume 5579, (2004) https://doi.org/10.1117/12.567390

KEYWORDS: Bessel beams, Axicons, Gaussian beams, Laser beam propagation, Reflectivity, Beam propagation method, Beam shaping, Nondiffracting beams, Oscillators, Optical simulations

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SPIE Journal Paper | 1 November 2004

Ultrafast spatiotemporal processing with thin-film micro-optics

Ruediger Grunwald, Volker Kebbel, Uwe Neumann, Uwe Griebner, Michel Piché

OE, Vol. 43, Issue 11, (November 2004) https://doi.org/10.1117/12.10.1117/1.1801432

KEYWORDS: Ultrafast phenomena, Thin films, Diffraction, Beam shaping, Wavefront sensors, Sensors, Second-harmonic generation, Sapphire lasers, Micro optics, Wave propagation

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Proceedings Article | 2 August 2004 Paper

Setup calibration and optimization for comparative digital holography

Torsten Baumbach, Wolfgang Osten, Volker Kebbel, Christoph von Kopylow, Werner Jueptner

Proceedings Volume 5532, (2004) https://doi.org/10.1117/12.563323

KEYWORDS: Wavefronts, Holograms, Digital holography, Spatial light modulators, Calibration, Phase shifts, 3D image reconstruction, Holography, Interferometry, LCDs

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With increasing globalization many enterprises decide to produce the components of their products at different locations all over the world. Consequently, new technologies and strategies for quality control are required. In this context the remote comparison of objects with regard to their shape or response on certain loads is getting more and more important for a variety of applications. For such a task the novel method of comparative digital holography is a suitable tool with interferometric sensitivity. With this technique the comparison in shape or deformation of two objects does not require the presence of both objects at the same place. In contrast to the well known incoherent techniques based on inverse fringe projection this new approach uses a coherent mask for the illumination of the sample object. The coherent mask is created by digital holography to enable the instant access to the complete optical information of the master object at any wanted place. The reconstruction of the mask is done by a spatial light modulator (SLM). The transmission of the digital master hologram to the place of comparison can be done via digital telecommunication networks. Contrary to other interferometric techniques this method enables the comparison of objects with different microstructure. In continuation of earlier reports our investigations are focused here on the analysis of the constraints of the setup with respect to the quality of the hologram reconstruction with a spatial light modulator. For successful measurements the selection of the appropriate reconstruction method and the adequate optical set-up is mandatory. In addition, the use of a SLM for the reconstruction requires the knowledge of its properties for the accomplishment of this method. The investigation results for the display properties such as display curvature, phase shift and the consequences for the technique will be presented. The optimization and the calibration of the set-up and its components lead to improved results in comparative digital holography with respect to the resolution. Examples of measurements before and after the optimization and calibration will be presented.

Proceedings Article | 2 August 2004 Paper

Active alignment for interferometric techniques onboard the International Space Station

Volker Kebbel, Joachim Becker, Werner Jueptner

Proceedings Volume 5532, (2004) https://doi.org/10.1117/12.563322

KEYWORDS: Wavefronts, Interferometry, Interferometers, Temperature metrology, Sensors, Error analysis, Holographic interferometry, CCD cameras, Optical components, Environmental sensing

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Different interferometric techniques are required to cover most of the scientific needs in the field of fluid dynamics science in microgravity research. The Fluid Science Laboratory (FSL), currently under upgrade for the Columbus Orbital Facility of the International Space Station (ISS), shall provide Holographic Interferometry, Digital Holography, Electronic Speckle Pattern Interferometry (ESPI) and Shearing Interferometry among other diagnostic tools. On earth, these highly sensitive interferometers are operated in a thermal and mechanical controlled environment. In opposition to the situation on ground the multi-user facility of the FSL has severe constraints for what concerns volume, mass, modularity, operational needs and its environment. This results in a three-dimensional modular drawer structure for the design of the optical-mechanical set-up, where performance limitations must be expected compared to systems on ground. In a rather uncontrolled thermal environment onboard the ISS this leads to misalignment due to thermo-mechanical changes of the Aluminum structure during experiment runs which finally result in interferogram distortions and therefore to significant measurement errors. In this paper we report about a misalignment detection- and active compensation concept developed on the basis of a thermo-mechanical and optical analysis of the set-up. The detection system is based on a simplified Hartmann-Sensor. It is able to separate wave front tilt and curvature errors due to misalignments of the interferometers itself from the effects caused by the experiment. The closed-loop compensation system uses optical components of the set-up driven by piezoelectric actuators. Due to its active approach this concept allows for the real time accessibility of the experimental effects in the framework of “Telescience.” Extensive functional tests as well as representative thermal tests show the suitability of the proposed technique to compensate interferogram distortions due to thermal-mechanical deformations. Thus, it is able to ensure interferometric measurements with sub-wavelength accuracy onboard the ISS.

Proceedings Article | 1 June 2004 Paper

Wavefront autocorrelation of femtosecond laser beams

Ruediger Grunwald, Uwe Neumann, Uwe Griebner, Klaus Reimann, Guenter Steinmeyer, Volker Kebbel

Proceedings Volume 5333, (2004) https://doi.org/10.1117/12.526722

KEYWORDS: Wavefronts, Wavefront sensors, Sensors, Beam splitters, Thin films, Femtosecond phenomena, Axicons, Silica, CCD cameras, Neodymium

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Proceedings Article | 1 June 2004 Paper

Spatio-temporal control of laser beams with thin film shapers

Ruediger Grunwald, Uwe Neumann, Uwe Griebner, Volker Kebbel, Hans-Joachim Kuehn

Proceedings Volume 5333, (2004) https://doi.org/10.1117/12.526661

KEYWORDS: Thin films, Semiconductor lasers, Reflectivity, Micro optics, Collimation, Nondiffracting beams, Beam shaping, Vacuum ultraviolet, Axicons, Microlens array

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Proceedings Article | 10 November 2003 Paper

Spatio-temporal processing of femtosecond laser pulses with thin film micro-optics

Ruediger Grunwald, Volker Kebbel, Uwe Neumann, Uwe Griebner, Michel Piche

Proceedings Volume 5181, (2003) https://doi.org/10.1117/12.508044

KEYWORDS: Thin films, Diffraction, Ultrafast phenomena, Beam shaping, Wavefront sensors, Femtosecond phenomena, Sensors, Wavefronts, Wave propagation, Sapphire lasers

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Proceedings Article | 17 February 2003 Paper

Femtosecond laser beam shaping with structured thin-film elements

Ruediger Grunwald, Volker Kebbel, Uwe Griebner, Uwe Neumann, Andreas Kummrow, Erik Nibbering, M Rini, Michel Piche, Guy Rousseau, Michelle Fortin

Proceedings Volume 4833, (2003) https://doi.org/10.1117/12.473829

KEYWORDS: Axicons, Thin films, Beam shaping, Mirrors, Femtosecond phenomena, Sapphire lasers, Optical simulations, Reflectivity, Wavefronts, Bessel beams

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Proceedings Article | 19 June 2002 Paper

Characterization of aspherical micro-optics using digital holography: improvement of accuracy

Volker Kebbel, Jan Mueller, Werner Jueptner

Proceedings Volume 4778, (2002) https://doi.org/10.1117/12.473539

KEYWORDS: Wavefronts, Holograms, Digital holography, Microlens, CCD cameras, Speckle, 3D image reconstruction, Image filtering, Speckle pattern, Digital filtering

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Proceedings Article | 27 December 2001 Paper

New approach for testing of aspherical micro-optics with high numerical aperture

Volker Kebbel, Hans-Juergen Hartmann, Werner Jueptner

Proceedings Volume 4451, (2001) https://doi.org/10.1117/12.453633

KEYWORDS: Holograms, Wavefronts, 3D image reconstruction, Digital holography, CCD cameras, Holography, Microlens, Diffraction, Image processing, Interferometry

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Proceedings Article | 23 October 2001 Paper

Application of digital holographic microscopy for inspection of micro-optical components

Volker Kebbel, Hans-Juergen Hartmann, Werner Jueptner

Proceedings Volume 4398, (2001) https://doi.org/10.1117/12.445551

KEYWORDS: Digital holography, Holography, Holograms, 3D image reconstruction, Wavefronts, Microscopy, CCD cameras, Inspection, Interferometry, Microlens

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Proceedings Article | 7 July 1997 Paper

General approach for the description of optical 3D measuring systems

Peter Andrae, Werner Jueptner, Volker Kebbel, Wolfgang Osten

Proceedings Volume 3174, (1997) https://doi.org/10.1117/12.279782

KEYWORDS: 3D modeling, 3D metrology, Geometrical optics, Holographic interferometry, Calibration, Systems modeling

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Showing 5 of 16 publications

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