Dr. Christian Eisele Profile

Dr. Christian Eisele

Senior Scientist at Fraunhofer IOSB

SPIE Involvement:

Conference Program Committee | Author

Profile Summary

Christian Eisele is senior scientist in the signatorics department at the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation in Ettlingen, Germany.

He received his diploma in physics in 2003 from the Albert-Ludwigs-Universitaet in Freiburg i.Br., Germany, with a specialization in atomic, molecular and optical physics. In 2009 he received his Ph.D. in physics from the Heinrich-Heine-Universitaet in Duesseldorf, Germany, for his work on a laser based test of the isotropy of light propagation.

Dr. Eisele is Fellow of the Duesseldorf Entrepreneurs Foundation and of the Wilhelm-and-Else-Heraeus Foundation. Since 2010 he is working in the warning sensor technology group at Fraunhofer IOSB on topics like missile warning technology and hostile fire indication, as well as on atmospherical propagation effects.

Publications (27)

Proceedings Article | 1 November 2024 Presentation + Paper

Presentation + Paper

Development of a sensor hardened against laser damage independent of wavelength by off-focus imaging

M. Henrichsen, C. Eisele, B. Schwarz, J. Limbach, G. Ritt, S. Dengler, J. Meyer

Proceedings Volume 13200, 132000N (2024) https://doi.org/10.1117/12.3030908

KEYWORDS: Sensors, Image restoration, Nonlinear filtering, Laser induced damage, Cameras, Spatial light modulators, Optical filters, Image sensors

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Proceedings Article | 1 November 2024 Presentation + Paper

Presentation + Paper

DEBELA: investigations on potential detect-before-launch technologies

Christian Eisele, Dirk Seiffer, Erik Sucher, Lars Sjöqvist, Markus Henriksson, Claire Lavigne, Roland Domel, Philippe Déliot, Judith Dijk, Hugo Kuijf, Nicolas Boehrer

Proceedings Volume 13200, 132001A (2024) https://doi.org/10.1117/12.3031507

KEYWORDS: Missiles, Sensors, Imaging systems, Cameras, Polarization, Electrooptics, Light sources and illumination, Reflection, Laser radiation, Mid-IR

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Proceedings Article | 23 October 2023 Paper

Paper

Design and implementation of a micrometeorological weather station for ground-based swarm environments

Thomas Kociok, Lars Ullmer, Christian Eisele, Alexander M. van Eijk, Karin Stein

Proceedings Volume 12736, 127360F (2023) https://doi.org/10.1117/12.2682300

KEYWORDS: Sensors, Environmental monitoring, Clouds, Internet of things, Design and modelling, Aerosols, Data transmission, Data processing, Data acquisition, Ultraviolet radiation

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Proceedings Article | 20 October 2023 Presentation

Presentation

Evaluation of the performance and accuracy of a micrometeorological weather station for measuring weather parameters through point measurements

Thomas Kociok, Lars Ullmer, Eisele Christian, Alexander M.J. van Eijk, Karin Stein

Proceedings Volume 12727, 1272716 (2023) https://doi.org/10.1117/12.2682310

KEYWORDS: Ultraviolet radiation, Aerosols, Wind speed, Turbulence, Temperature metrology, Sensors, Reliability, Optical tracking, Infrared radiation, Meteorology

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Proceedings Article | 19 October 2023 Presentation + Paper

Presentation + Paper

An electrooptical propagation and signature experiment in a humid environment

Christian Eisele, Dirk Seiffer, Erik Sucher, Carmen Ullwer, Peter Großmann, Berndt Bartos

Proceedings Volume 12731, 1273104 (2023) https://doi.org/10.1117/12.2675880

KEYWORDS: Simulations, Sensors, Turbulence, Electro optics, Electro optical modeling, Atmospheric propagation, Thermal modeling

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Proceedings Article | 17 October 2023 Presentation + Paper

Presentation + Paper

Scene-based Fourier pattern-sorting approach for compressive sensing

Jürgen Limbach, Christian Eisele

Proceedings Volume 12740, 1274002 (2023) https://doi.org/10.1117/12.2681387

KEYWORDS: Image quality, Image processing, Compressed sensing, Infrared imaging, Fourier transforms, Reconstruction algorithms, Sensors, Threat warning systems, Compressive imaging, Computational imaging

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Proceedings Article | 7 December 2022 Presentation + Paper

Presentation + Paper

Comparison of compressive imaging and video techniques for threat detection applications

Jürgen Limbach, Christian Eisele

Proceedings Volume 12274, 122740F (2022) https://doi.org/10.1117/12.2636239

KEYWORDS: Reconstruction algorithms, Image compression, Optimization (mathematics), Near infrared, Long wavelength infrared, Mid-IR, Compressed sensing, Compressive imaging

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Proceedings Article | 12 September 2021 Presentation + Paper

Presentation + Paper

A universal software framework for the assessment of compressed sensing algorithms

Jürgen Limbach, Christian Eisele

Proceedings Volume 11868, 118680A (2021) https://doi.org/10.1117/12.2599941

KEYWORDS: Reconstruction algorithms, Compressed sensing, Image processing, Image compression, Near infrared, Ultraviolet radiation, Software frameworks, Mid-IR, Long wavelength infrared, Image quality

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Proceedings Article | 20 September 2020 Presentation + Paper

Presentation + Paper

Performance assessment of reconstruction algorithms for compressed sensing threat detection applications

Jürgen Limbach, Christian Eisele

Proceedings Volume 11540, 115400H (2020) https://doi.org/10.1117/12.2572598

KEYWORDS: Reconstruction algorithms, Compressed sensing, Ultraviolet radiation, Modulation, Image compression, Threat warning systems, Image quality

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Proceedings Article | 16 October 2019 Paper

Paper

Analysis of measurement matrices for a single-pixel-camera based on both theoretical and practical performance

Jürgen Limbach, Christian Eisele, Gabriela Paunescu

Proceedings Volume 11163, 111630G (2019) https://doi.org/10.1117/12.2532771

KEYWORDS: Matrices, Modulation, Compressed sensing, Digital micromirror devices, Cameras, Reconstruction algorithms

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Proceedings Article | 9 October 2019 Paper

Paper

Near-surface turbulence effects on electro-optical propagation in an arid environment

Christian Eisele, Dirk Seiffer, Erik Sucher, Carmen Ullwer, Thomas Kociok, Detlev Sprung, Sven van Binsbergen, Piet Bijl

Proceedings Volume 11153, 1115302 (2019) https://doi.org/10.1117/12.2531009

KEYWORDS: Turbulence, Electro optics, Atmospheric propagation, Algorithm development, Modulation transfer functions, Atmospheric sensing, Optical sensors, Detector development, Detection and tracking algorithms, Electro optical systems

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SPIE Journal Paper | 12 December 2018 Open Access

Open Access

Special Section Guest Editorial: Optics in Atmospheric Propagation and Adaptive Systems

Karin Stein, Szymon Gladysz, Christian Eisele, Vladimir Lukin

JARS, Vol. 12, Issue 04, 042401, (December 2018) https://doi.org/10.1117/12.10.1117/1.JRS.12.042401

KEYWORDS: Atmospheric propagation, Adaptive optics, Atmospheric optics, Turbulence, Wavefront sensors, Telescopes, Image processing, Atmospheric modeling, Scattering, Wave propagation

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Proceedings Article | 10 October 2018 Paper

Paper

Optical turbulence in the coastal area over False Bay, South Africa: comparison of measurements and modeling results

Detlev Sprung, Alexander M. van Eijk, Carmen Ullwer, Willi Gunter, Christian Eisele, Dirk Seiffer, Erik Sucher, Karin Stein

Proceedings Volume 10787, 1078703 (2018) https://doi.org/10.1117/12.2325609

KEYWORDS: Optical turbulence, Turbulence, Heat flux, Meteorology, Atmospheric propagation, Ultrasonics, Atmospheric modeling, Wave propagation, Atmospheric optics, Humidity

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Proceedings Article | 10 October 2018 Paper

Paper

Height dependence of characteristics of power spectra of temperature investigated in the surface layer of White Sands, US

Detlev Sprung, Erik Sucher, Alexander M. van Eijk, Christian Eisele, Dirk Seiffer, Karin Stein

Proceedings Volume 10787, 1078705 (2018) https://doi.org/10.1117/12.2325617

KEYWORDS: Turbulence, Ultrasonics, Optical turbulence, Temperature metrology, Wave propagation, Vegetation, Atmospheric propagation, Refractive index, Cameras, Data modeling

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Proceedings Article | 10 October 2017 Paper

Paper

Comparison of integrated optical turbulence over the sea in different coastal regions in the world

Detlev Sprung, Erik Sucher, Christian Eisele, Dirk Seiffer, Alexander M. van Eijk, Karin Stein

Proceedings Volume 10425, 1042502 (2017) https://doi.org/10.1117/12.2279425

KEYWORDS: Optical turbulence, Climatology, Integrated optics, Electro optics, Electro optical systems, Laser systems engineering, Atmospheric optics, Turbulence, High speed cameras, Halogens

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Proceedings Article | 5 October 2017 Paper

Paper

Airborne platform effects on lasers and warning sensors

Markus Henriksson, Christian Eisele, Dirk Seiffer, Lars Sjöqvist, Fabio Togna, Marie-Thérèse Velluet

Proceedings Volume 10435, 104350M (2017) https://doi.org/10.1117/12.2277311

KEYWORDS: Directed infrared countermeasures, Turbulence, Modeling, Gases, Laser countermeasures, Airborne laser technology, Sensors, Optical turbulence, Laser beam propagation, Laser beam diagnostics

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Airborne platform effects on lasers and warning sensors (ALWS) has been a European collaborative research project to investigate the effects of platform-related turbulence on optical countermeasure systems, especially missile approach warning systems (MAWS) and directed infrared countermeasures (DIRCM). Field trials have been carried out to study the turbulence effects around a hovering helicopter and behind a turboprop aircraft with engines running on the ground. In addition different methods for modelling the effects have been investigated.

In the helicopter trials significant beam wander, scintillations and beam broadening were experienced by narrow divergence laser beams when passing through the down-wash of the hot engine exhaust gases. The measured effects considerably exceed the effects of atmospheric turbulence. Extraction of turbulence parameters for modelling of DIRCM-relevant scenarios show that in most cases the reduction of jamming power and distortion of jamming waveform can be expected to be small. The reduction of effects of turbulence is mainly related to the larger beam divergence and shorter Rayleigh length of DIRCM lasers compared to the experimental probe beams. Measurements using the turboprop platform confirm that tolerable effects on laser beam properties are found when the laser beam passes through the exhaust 15 m behind the outlet where the exhaust gases are starting to cool down.

Modelling efforts have shown that time-resolved computational fluid dynamics (CFD) calculations can be used to study properties of beam propagation in engine exhaust-related turbulence. Because of computational cost and the problem of validating the CFD results the use for system performance simulations is however difficult.

The hot exhaust gases emitted from aircraft engines create extreme optical turbulence in a local region. The effects on countermeasure system performance depend both on the system parameters and on the threat characteristics. With present-day DIRCM systems, the effects of even severe turbulence are often tolerable.

Proceedings Article | 29 September 2017 Presentation + Paper

Presentation + Paper

Electro-optical propagation measurements during the MINOTAUROS experiment in the Cretan Sea

Christian Eisele, Erik Sucher, Norbert Wendelstein, Karin Stein

Proceedings Volume 10425, 1042506 (2017) https://doi.org/10.1117/12.2278595

KEYWORDS: Atmospheric propagation, Turbulence, Refraction, Atmospheric optics, Electro optics, Ocean optics, Knowledge management, Meteorology

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Proceedings Article | 7 September 2017 Paper

Paper

Investigation of the height dependency of optical turbulence in the surface layer over False Bay (South Africa)

Detlev Sprung, Alexander M. van Eijk, Willie Günter, Derek Griffith, Christian Eisele, Erik Sucher, Dirk Seiffer, Karin Stein

Proceedings Volume 10408, 104080U (2017) https://doi.org/10.1117/12.2275859

KEYWORDS: Optical turbulence, Atmospheric propagation, Atmospheric turbulence, Electro optics, Scintillation, Laser systems engineering, Optical testing, Meteorology, Turbulence

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Proceedings Article | 21 October 2016 Paper

Paper

Electro-optical muzzle flash detection

Jürgen Krieg, Christian Eisele, Dirk Seiffer

Proceedings Volume 9987, 99870A (2016) https://doi.org/10.1117/12.2240777

KEYWORDS: Sensors, Electro optics, Short wave infrared radiation, Acoustics, Infrared detectors, Firearms, Mid-IR, Near infrared, Infrared radiation, Signal detection

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Proceedings Article | 19 October 2016 Paper

Paper

FESTER: a propagation experiment, overview and first results

Christian Eisele, Dirk Peter Seiffer, Karin Stein, Erik Sucher, Willem Gunter, Faith February, George Vrahimis, Carl Wainman, Benita Maritz, Mokete Koago, Alexander M. van Eijk, Miranda van Iersel, Leo Cohen, Sven van Binsbergen, H. J. M. (Eric) Heemskerk, Armin Sternberg, Helmut Schulte, Arthur van Rheenen, Erik Brenthagen, Jan Thomassen, Derek Griffith

Proceedings Volume 10002, 1000208 (2016) https://doi.org/10.1117/12.2240771

KEYWORDS: Atmospheric propagation, Aerosols, Atmospheric particles, Sensors, Mid-IR, Long wavelength infrared, Environmental sensing, Turbulence, Halogens, Temperature metrology

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Proceedings Article | 19 October 2016 Presentation + Paper

Presentation + Paper

First results on the Experiment FESTER on optical turbulence over False Bay South Africa: dependencies and consequences

Detlev Sprung, Alexander M. van Eijk, Erik Sucher, Christian Eisele, Dirk Seiffer, Karin Stein

Proceedings Volume 10002, 1000209 (2016) https://doi.org/10.1117/12.2240651

KEYWORDS: Optical turbulence, Atmospheric propagation, Electro optical systems, Turbulence, Heat flux, Ultrasonics, Kinematics, Refractive index, Temperature metrology, Receivers

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Proceedings Article | 19 October 2016 Paper

Paper

Static and dynamic thermal infrared signatures measured during the FESTER experiment: first results

W. Gunter, F. February, D. Seiffer, C. Eisele

Proceedings Volume 10002, 100020C (2016) https://doi.org/10.1117/12.2244530

KEYWORDS: Infrared signatures, Temperature metrology, Infrared radiation, Sensors, Metals, Thermography, Environmental sensing, Mid-IR, Infrared sensors, Clouds

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Proceedings Article | 19 September 2016 Presentation + Paper

Presentation + Paper

The dependence of optical turbulence on thermal and mechanical forces over the sea

Alexander M. J. van Eijk, Detlev Sprung, Erik Sucher, Christian Eisele, Dirk Seiffer, Karin Stein

Proceedings Volume 9979, 99790R (2016) https://doi.org/10.1117/12.2239324

KEYWORDS: Optical turbulence, Turbulence, Refractive index, Heat flux, Humidity, Statistical analysis, Kinematics, Receivers, Meteorology, Wind measurement

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Proceedings Article | 19 September 2016 Presentation + Paper

Presentation + Paper

The FESTER field trial

Alexander M. van Eijk, Willie Gunter, Faith February, Benita Maritz, George Vrahimis, Mokete Koago, Carl Wainman, Christian Eisele, Dirk Seiffer, Erik Sucher, Karin Stein, Miranda van Iersel, Leo Cohen, Sven Van Binsbergen, H. J. M. (Eric) Heemskerk, A. Sternberg, H. Schulte, Arthur van Rheenen, Erik Brenthagen, Jan Thomassen, D. Griffith

Proceedings Volume 9979, 99790Q (2016) https://doi.org/10.1117/12.2240642

KEYWORDS: Electro optics, Environmental sensing, Long wavelength infrared, Turbulence, Sensors, Mid-IR, Atmospheric propagation, Aerosols, Temperature metrology, Metals

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Proceedings Article | 27 October 2015 Paper

Paper

Quantification of helicopter rotor downwash effects on electro-optical defensive aids suites

Dirk Seiffer, Christian Eisele, Markus Henriksson, Lars Sjöqvist, Sebastian Möller, Fabio Togna, Marie-Thérèse Velluet

Proceedings Volume 9650, 96500I (2015) https://doi.org/10.1117/12.2195645

KEYWORDS: Missiles, Gases, Directed infrared countermeasures, Electro optics, Atmospheric propagation, Laser countermeasures, Sensors, Laser systems engineering, Turbulence, Refractive index

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Proceedings Article | 8 October 2015 Paper

Paper

Ultimate turbulence experiment: simultaneous measurements of Cn2 near the ground using six devices and eight methods

Lydia Yatcheva, Rui Barros, Max Segel, Detlev Sprung, Erik Sucher, Christian Eisele, Szymon Gladysz

Proceedings Volume 9641, 964105 (2015) https://doi.org/10.1117/12.2195029

KEYWORDS: Optical transfer functions, Turbulence, Modulation transfer functions, Light emitting diodes, Wavefront sensors, Point spread functions, Refractive index, Motion measurement, Sensors, Atmospheric propagation

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Proceedings Article | 4 September 2015 Paper

Paper

Estimation of turbulence strength, anisotropy, outer scale and spectral slope from an LED array

Szymon Gladysz, Max Segel, Christian Eisele, Rui Barros, Erik Sucher

Proceedings Volume 9614, 961402 (2015) https://doi.org/10.1117/12.2191287

KEYWORDS: Turbulence, Light emitting diodes, Anisotropy, Wavefront sensors, Sensors, Optical turbulence, Motion measurement, Refractive index, Telescopes, Optical sensors

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Showing 5 of 27 publications

Conference Committee Involvement (7)

Environmental Effects on Light Propagation and Adaptive Systems VII

18 September 2024 | Edinburgh, United Kingdom

Environmental Effects on Light Propagation and Adaptive Systems VI

5 September 2023 | Amsterdam, Netherlands

Environmental Effects on Light Propagation and Adaptive Systems V

6 September 2022 | Berlin, Germany

Environmental Effects on Light Propagation and Adaptive Systems IV

13 September 2021 | Online Only, Spain

Environmental Effects on Light Propagation and Adaptive Systems III

23 September 2020 | Online Only, United Kingdom

Showing 5 of 7 Conference Committees

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