Dr. Stefan Riehemann Profile

Dr. Stefan Riehemann

Group Manager of Optical Systems Design at Fraunhofer-IOF

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Author

Publications (14)

Proceedings Article | 21 September 2011 Paper

Surface metrology system based on bidirectional microdisplays

Constanze Grossmann, Franziska Perske, Susanne Zwick, Judith Baumgarten, Bernd Richter, Stefan Riehemann, Uwe Vogel, Gunther Notni, Andreas Tünnermann

Proceedings Volume 8167, 81670Q (2011) https://doi.org/10.1117/12.896790

KEYWORDS: Sensors, Organic light emitting diodes, Photodiodes, Confocal microscopy, Optical design, Prototyping, Position sensors, Lens design, Metrology, Light sources

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Proceedings Article | 21 September 2011 Paper

An opto-mechanical model and stray light investigation of laser treated human eye

Katharina Frey, Martin Palme, Thomas Peschel, Stefan Riehemann, Gunther Notni

Proceedings Volume 8167, 816705 (2011) https://doi.org/10.1117/12.896496

KEYWORDS: Eye models, Eye, Stray light, Data modeling, Visual process modeling, Finite element methods, Visualization, Optical simulations, Retina, Modulation transfer functions

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Proceedings Article | 21 September 2011 Paper

Monolithical optical freeform element for an IR line camera

S. Riehemann, M. Palme, R. Steinkopf, P. Munzert, G. Notni, J. Krieg

Proceedings Volume 8167, 81670H (2011) https://doi.org/10.1117/12.895153

KEYWORDS: Optical components, Infrared cameras, Optics manufacturing, Optical design, Spatial resolution, Cameras, Mirrors, Freeform optics, Manufacturing, Diamond

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Proceedings Article | 9 February 2009 Paper

Multi-channel detection of ultrashort THz-pulses based on photoconductive antennas

Wiebke Freese, Boris Pradarutti, Stefan Riehemann, Hans-Christoph Eckstein, Gunther Notni, Stefan Nolte, Andreas Tünnermann

Proceedings Volume 7215, 721505 (2009) https://doi.org/10.1117/12.810245

KEYWORDS: Terahertz radiation, Antennas, Sensors, Mirrors, Optical testing, Metals, Optical simulations, Wave propagation, Detector arrays, Spatial resolution

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Proceedings Article | 27 September 2008 Paper

Design and analysis of quasi-optical THz time domain imaging systems

Claudia Brückner, Boris Pradarutti, Ralf Müller, Stefan Riehemann, Gunther Notni, Andreas Tünnermann

Proceedings Volume 7100, 71000S (2008) https://doi.org/10.1117/12.797606

KEYWORDS: Terahertz radiation, Modulation transfer functions, Imaging systems, Lenses, Diffraction, Absorption, Zemax, Refractive index, Mirrors, Optical design

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Proceedings Article | 26 September 2007 Paper

Terahertz imaging for styrofoam inspection

B. Pradarutti, S. Riehemann, G. Notni, A. Tünnermann

Proceedings Volume 6772, 67720P (2007) https://doi.org/10.1117/12.735708

KEYWORDS: Terahertz radiation, Inspection, Refractive index, Millimeter wave imaging, Iron, Absorption, Ultrafast phenomena, Mirrors, Gallium arsenide, Imaging systems

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Proceedings Article | 19 April 2006 Paper

Moth-eye structures for reduction of Fresnel losses at THz components

Claudia Brückner, Boris Pradarutti, Stefan Riehemann, Olaf Stenzel, Ralf Steinkopf, Andreas Gebhardt, Gunther Notni, Andreas Tünnermann

Proceedings Volume 6194, 61940N (2006) https://doi.org/10.1117/12.662199

KEYWORDS: Terahertz radiation, Antireflective coatings, Reflectivity, Refractive index, Manufacturing, Transmittance, Reflection, Diffraction, Silicon, Coating

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Proceedings Article | 19 April 2006 Paper

InN as THz emitter excited at 1060 nm and 800 nm

Boris Pradarutti, Gabor Matthäus, Claudia Brückner, Stefan Riehemann, Gunther Notni, Stefan Nolte, Volker Cimalla, Vadim Lebedev, Oliver Ambacher, Andreas Tünnermann

Proceedings Volume 6194, 61940I (2006) https://doi.org/10.1117/12.662301

KEYWORDS: Terahertz radiation, Indium nitride, Indium arsenide, Electrons, Semiconductors, Gallium arsenide, Gallium antimonide, Pulsed laser operation, Antennas, Sapphire

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Proceedings Article | 28 February 2006 Paper

Surface-emitted THz generation using a compact ultrashort pulse fiber amplifier at 1064 nm

Gabor Matthäus, Thomas Schreiber, Jens Limpert, Stefan Nolte, Garik Torosyan, René Beigang, Stefan Riehemann, Gunther Notni, Andreas Tünnermann

Proceedings Volume 6108, 610813 (2006) https://doi.org/10.1117/12.651022

KEYWORDS: Terahertz radiation, Fiber amplifiers, Absorption, Ultrafast phenomena, Fiber lasers, Gallium arsenide, Antennas, Receivers, Sensors, Semiconductors

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Proceedings Article | 15 October 2005 Paper

System concept and optical design of miniaturized projection and imaging systems with OLED microdisplays

Stefan Riehemann, Martin Palme, Uwe Lippmann, Nancy Wolf, Gunther Notni

Proceedings Volume 5962, 59620X (2005) https://doi.org/10.1117/12.624570

KEYWORDS: Organic light emitting diodes, Projection systems, Imaging systems, Optical design, Modulation transfer functions, Lens design, Distortion, LCDs, Liquid crystal on silicon, Molecules

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Proceedings Article | 2 August 2004 Paper

OLED microdisplays: a new key element for fringe projection setups

Gunther Notni, Stefan Riehemann, Peter Kuehmstedt, Lars Heidler, Nancy Wolf

Proceedings Volume 5532, (2004) https://doi.org/10.1117/12.560433

KEYWORDS: Organic light emitting diodes, Light sources, Projection systems, LCDs, Reflectivity, Liquid crystal on silicon, Fringe analysis, Polymers, Microscopes, Digital micromirror devices

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Proceedings Article | 21 May 1999 Paper

Statistical analysis of structural changes in a whole brain based on nonlinear image registration

Christian Gaser, Stefan Kiebel, Stefan Riehemann, Hans-Peter Volz, Heinrich Sauer

Proceedings Volume 3661, (1999) https://doi.org/10.1117/12.348636

KEYWORDS: Brain, Statistical analysis, Image registration, Neuroimaging, Control systems, Statistical modeling, Transform theory, Magnetic resonance imaging, Brain mapping, Image segmentation

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Proceedings Article | 21 May 1999 Paper

Evaluation of cerebral 31-P chemical shift images utilizing statistical parametric mapping

Stefan Riehemann, Christian Gaser, Hans-Peter Volz, Heinrich Sauer

Proceedings Volume 3661, (1999) https://doi.org/10.1117/12.348516

KEYWORDS: Chemical analysis, Statistical analysis, Control systems, Imaging spectroscopy, Brain, Spectroscopy, Image processing, Scanning probe microscopy, Scanners, Phosphorus

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Proceedings Article | 20 May 1999 Paper

Lateralization effects of image-guided 31P magnetoresonance spectroscopic parameters in the frontal lobe of schizophrenics and healthy controls

Gabriele Huebner, Hans-Peter Volz, Stefan Riehemann, Berit Wenda, Grit Roessger, Reinhard Rzanny, Heinrich Sauer

Proceedings Volume 3660, (1999) https://doi.org/10.1117/12.349613

KEYWORDS: Control systems, Spectroscopy, In vivo imaging, Phosphorus, Imaging spectroscopy, Magnetic resonance imaging, Brain, Chemical analysis, Prefrontal cortex, Head

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Showing 5 of 14 publications

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