Prof. Andreas Eckart Profile

Prof. Andreas Eckart

Professor at Univ zu Köln

SPIE Involvement:

Author

Publications (74)

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Warm calibration unit of the mid-infrared ELT instrument METIS: overview and current status towards FDR

Monika Rutowska, Tarun Kumar Sharma, Michael Wiest, Sabine Graf, Lucas Labadie, Christian Straubmeier, Andreas Eckart, Stephen Todd, Tibor Agócs, Gert Raskin, Jan Goris, Marchel Gerbers, Leonard Burtscher, Roy van Boekel, Adrian Glauser, Jeffrey Lynn, Bernhard Brandl, Felix Bettonvil

Proceedings Volume 12184, 121843M (2022) https://doi.org/10.1117/12.2630802

KEYWORDS: Optical fibers, Mirrors, Mirror mounts, Interfaces, Calibration, Integrating spheres, Optical benches, Helium neon lasers, Sensors

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Optical design, analysis, and performances of the infrared and visible channels of the warm calibration unit in METIS/ELT

T. Sharma, M. Rutowska, M. Wiest, S. Graf, L. Labadie, C. Straubmeier, A. Eckart, S. Todd, T. Agócs, R. Stuik, B. Brandl, F. Bettonvil

Proceedings Volume 12184, 121843L (2022) https://doi.org/10.1117/12.2630800

KEYWORDS: Mirrors, Tolerancing, Relays, Calibration, Optical design, Mirror mounts, Spherical lenses, Optical components, Zemax

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Proceedings Article | 15 January 2021 Poster + Paper

Poster + Paper

GRAVITY upgrade with high-performance grisms with factor >2 enhanced throughput

Senol Yazici, Takashi Sukegawa, Martin Mayer, Frank Eisenhauer, Yukinobu Okura, Karine Perraut, Laurent Jocou, Stefan Gillessen, Frank Haussmann, Alexander Buron, David Huber, Lothar Barl, Kateryna Kravchenko, Oliver Pfuhl, Sylvestre Lacour, Vincent Lapeyrere, Erich Wiezorrek, Thomas Ott, Thibaut Paumard, Jinyi Shangguan, Feng Gao, Christian Straubmeier, Patricia Guajardo, Miguel Riquelme, Laurent Pallanca, Reinhard Genzel, Tim de Zeeuw, Michael Bauböck, Maryam Habibi, Christian Rau, Alejandra Jimenez Rosales, Julia Stadler, Odele Straub, Eckhard Sturm, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Andreas Eckart, Guy Perrin, Antonio Amorim, Paolo Garcia, Wolfgang Brandner

Proceedings Volume 11446, 114461X (2021) https://doi.org/10.1117/12.2561387

KEYWORDS: Spectroscopy, Interferometry, Spectral resolution, Germanium, Phase interferometry, Image resolution, Zinc, Refractive index, Antireflective coatings, Optical properties

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Warm calibration unit of the mid-infrared E-ELT instrument METIS: overview and current status of the project

Monika Rutowska, Tarun Sharma, Michael Wiest, Sabine Graf, Christian Straubmeier, Steffen Rost, Lucas Labadie, Andreas Eckart, Leonard Burtscher, Tibor Agócs, Dirk Lesman, Remko Stuik, Adrian Glauser, Bernhard Brandl, Felix Bettonvil

Proceedings Volume 11447, 114472T (2020) https://doi.org/10.1117/12.2562219

KEYWORDS: Calibration, Mid-IR, Integrating spheres, Large telescopes, Optical engineering, Interfaces, Optical benches, Optical alignment, Black bodies, Fiber lasers

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Proceedings Article | 11 July 2018 Paper

Paper

The calibration unit of the mid-infrared E-ELT instrument METIS

Nicola Baccichet, Lucas Labadie, Steffen Rost, Christian Straubmeier, Michael Wiest, Leonard Burtscher, Tibor Agócs, Willem Jellema, Ronald Roelfsema, Roy van Boekel, Adrian Glauser, Bernhard Brandl, Felix Bettonvil, Jeff Lynn, Andreas Eckart

Proceedings Volume 10702, 1070291 (2018) https://doi.org/10.1117/12.2312075

KEYWORDS: Calibration, Integrating spheres, Black bodies, Mid-IR, Alignment procedures, Infrared backgrounds

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Proceedings Article | 10 July 2018 Paper

Paper

The warm calibration unit of METIS: optical design and principle of operation

Christian Straubmeier, Nicola Baccichet, Lucas Labadie, Steffen Rost, Michael Wiest, Andreas Eckart, Bernhard Brandl, Tibor Agócs, Ronald Roelfsema, Jeffrey Lynn, Felix Bettonvil

Proceedings Volume 10702, 107028P (2018) https://doi.org/10.1117/12.2310112

KEYWORDS: Calibration, Optical design, Mirrors, Diffraction, Optical benches, Relays, Wavefronts, Mid-IR, Imaging systems, Astronomy

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Proceedings Article | 28 July 2014 Paper

Paper

The GRAVITY spectrometers: design report of the optomechanics and active cryogenic mechanisms

Michael Wiest, Senol Yazici, Sebastian Fischer, Markus Thiel, Marcus Haug, Constanza Araujo-Hauck, Christian Straubmeier, Imke Wank, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 9147, 91472M (2014) https://doi.org/10.1117/12.2056703

KEYWORDS: Spectrometers, Computer aided design, Optical design, Optical components, Feedback control, Mechanical engineering, Optomechanical design, Cryogenic mechanisms, Spectral resolution, Image resolution

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Proceedings Article | 24 July 2014 Paper

Paper

Performance of the LINC NIRVANA fringe and flexure tracker at delivery

Matthew Horrobin, Andreas Eckart, Udo Beckmann, Claus Connot, Jens Dierkes, Bettina Lindhorst, Edmund Nußbaum, Steffen Rost, Semir Smajić, Christian Straubmeier, Imke Wank, Thomas Bertram, Jörg-Uwe Pott

Proceedings Volume 9146, 91462G (2014) https://doi.org/10.1117/12.2055724

KEYWORDS: Sensors, Sensor performance, Head, Computer programming, Telescopes, Interfaces, Control systems, Optical filters, Electronics, K band

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Proceedings Article | 24 July 2014 Paper

Paper

The LINC-NIRVANA Fizeau interferometric imager: final lab integration, first light experiments and challenges

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 9146, 91460I (2014) https://doi.org/10.1117/12.2055495

KEYWORDS: Interferometry, Telescopes, Stars, Imaging systems, Sensors, Adaptive optics, Mirrors, Cameras, Cryogenics, Wavefront sensors

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Proceedings Article | 24 July 2014 Paper

Paper

The GRAVITY spectrometers: thermal behaviour

Imke Wank, Christian Straubmeier, Michael Wiest, Senol Yazici, Sebastian Fischer, Frank Eisenhauer, Guy Perrin, Karine Perraut, Wolfgang Brandner, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 9146, 914628 (2014) https://doi.org/10.1117/12.2055088

KEYWORDS: Spectrometers, Brain-machine interfaces, Copper, Nitrogen, Computer aided design, Temperature sensors, Interferometry, Infrared radiation, Solid modeling, Cameras

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Proceedings Article | 24 July 2014 Paper

Paper

The GRAVITY spectrometers: optical design and first light

Christian Straubmeier, Senol Yazici, Michael Wiest, Imke Wank, Sebastian Fischer, Frank Eisenhauer, Guy Perrin, Karine Perraut, Wolfgang Brandner, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 9146, 914629 (2014) https://doi.org/10.1117/12.2054736

KEYWORDS: Spectrometers, Integrated optics, Spectral resolution, Metrology, Prisms, Sensors, Polarization, Channel projecting optics, Detector arrays, Laser metrology

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Proceedings Article | 24 July 2014 Paper

Paper

The GRAVITY spectrometers: optical qualification

Senol Yazici, Christian Straubmeier, Michael Wiest, Imke Wank, Sebastian Fischer, Matthew Horrobin, Frank Eisenhauer, Guy Perrin, Karine Perraut, Wolfgang Brandner, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 9146, 914627 (2014) https://doi.org/10.1117/12.2055313

KEYWORDS: Spectrometers, Sensors, Information operations, Image resolution, High dynamic range imaging, Channel projecting optics, Telescopes, Cameras, Polarization, Spectral resolution

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GRAVITY¹ is a 2^nd generation Very Large Telescope Interferometer (VLTI) operated in the astronomical K-band. In the Beam Combiner Instrument² (BCI) four Fiber Couplers³ (FC) will feed the light coming from each telescope into two fibers, a reference channel for the fringe tracking spectrometer⁴ (FT) and a science channel for the science spectrometer⁴ (SC). The differential Optical Path Difference (dOPD) between the two channels will be corrected using a novel metrology concept.⁵ The metrology laser will keep control of the dOPD of the two channels. It is injected into the spectrometers and detected at the telescope level. Piezo-actuated fiber stretchers correct the dOPD accordingly. Fiber-fed Integrated Optics⁶ (IO) combine coherently the light of all six baselines and feed both spectrometers. Assisted by Infrared Wavefront Sensors⁷ (IWS) at each Unit Telescope (UT) and correcting the path difference between the channels with an accuracy of up to 5 nm, GRAVITY will push the limits of astrometrical accuracy to the order of 10 μas and provide phase-referenced interferometric imaging with a resolution of 4 mas. The University of Cologne developed, constructed and tested both spectrometers of the camera system. Both units are designed for the near infrared (1.95 - 2.45 μm) and are operated in a cryogenic environment. The Fringe Tracker is optimized for highest transmission with fixed spectral resolution (R = 22) realized by a double-prism.⁸ The Science spectrometer is more diverse and allows to choose from three different spectral resolutions⁸ (R = [22, 500, 4000]), where the lowest resolution is achieved with a prism and the higher resolutions are realized with grisms. A Wollaston prism in each spectrometer allows for polarimetric splitting of the light. The goal for the spectrometers is to concentrate at least 90% of the ux in 2 × 2 pixel (36 × 36 μm²) for the Science channel and in 1 pixel (24 × 24 μm) in the Fringe Tracking channel. In Section 1, we present the arrangement, direction of spectral dispersion and shift of polarization channels for both spectrometers, and the curvature of the spectra in the science spectrometer. In Section 2 we determine the best focus position of the detectors. The overall contrast of images at different positions of the detector stage is computed with the standard deviation of pixel values in the spectra containing region. In Section 3 we analyze high dynamic range images for each spectrometer and resolution obtained at the afore determined best focus positions. We deduce the ensquared energy from the FWHM of Gaussian fits perpendicular to the spectra.

Proceedings Article | 8 July 2014 Paper

Paper

The LINC-NIRVANA high resolution imager: challenges from the lab to first light

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 9147, 91471M (2014) https://doi.org/10.1117/12.2055467

KEYWORDS: Telescopes, Imaging systems, Adaptive optics, Wavefront sensors, Stars, Interferometry, Image resolution, Calibration, Infrared telescopes, Infrared imaging

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SPIE Journal Paper | 6 February 2013

LINC-NIRVANA for the large binocular telescope: setting up the world’s largest near infrared binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Thomas Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jorg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kroner, Edmund Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Giuseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

OE, Vol. 52, Issue 08, 081602, (February 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.8.081602

KEYWORDS: Telescopes, Sensors, Mirrors, Interferometry, Near infrared, Adaptive optics, Interfaces, Cameras, Optical engineering, Astronomy

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Proceedings Article | 24 October 2012 Paper

Paper

LINC-NIRVANA for the LBT: setting up the world's largest NIR binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Tom Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jörg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kröner, Eddy Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Guiseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

Proceedings Volume 8511, 85110A (2012) https://doi.org/10.1117/12.928284

KEYWORDS: Telescopes, Mirrors, Sensors, Interferometry, Cameras, Adaptive optics, Near infrared, Stars, Imaging systems, Interfaces

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Proceedings Article | 13 September 2012 Paper

Paper

Diamond milling of metal mirrors with optical surface quality

Christof Iserlohe, Andreas Eckart, Christian Straubmeier, Damian Moratschke, Bernhard Brandl

Proceedings Volume 8450, 84504V (2012) https://doi.org/10.1117/12.925168

KEYWORDS: Mirrors, Surface roughness, Diamond, Metals, Optics manufacturing, Spherical lenses, Microscopes, Nose, Infrared radiation, Interferometers

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Proceedings Article | 12 September 2012 Paper

Paper

The GRAVITY spectrometers: optical design

Christian Straubmeier, Sebastian Fischer, Constanza Araujo-Hauck, Michael Wiest, Senol Yazici, Imke Wank, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, António Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 8445, 84452R (2012) https://doi.org/10.1117/12.925129

KEYWORDS: Spectrometers, Spectral resolution, Integrated optics, Sensors, Detector arrays, Prisms, Optical design, Polarization, Channel projecting optics, Metrology

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Proceedings Article | 12 September 2012 Paper

Paper

Functional and performance tests of the fringe and flexure tracking system for LINC-NIRVANA

C. Rauch, A. Eckart, M. Horrobin, B. Lindhorst, S. Rost, S. Smajić, C. Straubmeier, E. Tremou, I. Wank, J. Zuther

Proceedings Volume 8445, 844538 (2012) https://doi.org/10.1117/12.926036

KEYWORDS: Sensors, Point spread functions, Head, Fringe analysis, Telescopes, Wavefronts, Cameras, Adaptive optics, Astronomy, Computer programming

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Proceedings Article | 12 September 2012 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker control system

Steffen Rost, Andreas Eckart, Matthew Horrobin, Bettina Lindhorst, Christoph Rauch, Semir Smajic, Christian Straubmeier, Evangelia Tremou, Imke Wank, Jens Zuther, Jörg-Uwe Pott

Proceedings Volume 8445, 844539 (2012) https://doi.org/10.1117/12.926531

KEYWORDS: Sensors, Control systems, Digital signal processing, Computer programming, Mirrors, Stars, Telescopes, Filtering (signal processing), Fringe analysis, Electronic filtering

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Proceedings Article | 12 September 2012 Paper

Paper

Glass fiber reinforced plastics within the fringe and flexure tracker of LINC-NIRVANA

Semir Smajic, A. Eckart, M. Horrobin, B. Lindhorst, J.-U. Pott, C. Rauch, S. Rost, C. Straubmeier, E. Tremou, I. Wank, J. Zuther

Proceedings Volume 8445, 844527 (2012) https://doi.org/10.1117/12.926171

KEYWORDS: Sensors, Head, Aluminum, Telescopes, Computer programming, Cryogenics, Glasses, Adaptive optics, Epoxies, Interferometry

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Proceedings Article | 12 September 2012 Paper

Paper

A linear displacement mechanism for the GRAVITY spectrometers

Senol Yazici, Michael Wiest, Sebastian Fischer, Christian Straubmeier, Constanza Araujo-Hauck, Andreas Eckart, Imke Wank, Frank Eisenhauer, Guy Perrin, Karine Perraut, Wolfgang Brandner, António Amorim, Markus Schöller

Proceedings Volume 8445, 84452T (2012) https://doi.org/10.1117/12.925154

KEYWORDS: Spectrometers, Sensors, Brain-machine interfaces, Autocollimators, Distance measurement, Interferometry, Infrared sensors, Large telescopes, Interferometers, Telescopes

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Proceedings Article | 12 September 2012 Paper

Paper

Beating the confusion limit: the necessity of high angular resolution for probing the physics of Sagittarius A* and its environment: opportunities for LINC-NIRVANA (LBT), GRAVITY (VLTI) and and METIS (E-ELT)

A. Eckart, N. Sabha, G. Witzel, C. Straubmeier, B. Shahzamanian, M. Valencia-S., Macarena García-Marín, M. Horrobin, L. Moser, J. Zuther, S. Fischer, C. Rauch, S. Rost, C. Iserlohe, S. Yazici, S. Smajic, M. Wiest, C. Araujo-Hauck, I. Wank

Proceedings Volume 8445, 84451F (2012) https://doi.org/10.1117/12.925157

KEYWORDS: Stars, Spatial resolution, Monte Carlo methods, X-rays, Scattering, Physics, Telescopes, Statistical analysis, Infrared radiation, Near infrared

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Proceedings Article | 12 September 2012 Paper

Paper

LINC-NIRVANA: optical elements of the fringe and flexure tracker

Jens Zuther, Andreas Eckart, Thomas Bertram, Matthew Horrobin, Bettina Lindhorst, Uwe Lindhorst, Jörg-Uwe Pott, Christoph Rauch, Steffen Rost, Semir Smajic, Christian Straubmeier, Imke Wank, Udo Beckmann, Rainer Lenzen, Evangelia Tremou

Proceedings Volume 8445, 844536 (2012) https://doi.org/10.1117/12.926017

KEYWORDS: Sensors, Telescopes, Zemax, Optical components, Mirrors, Optical simulations, Interferometry, Point spread functions, Beam splitters, Optical tracking

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Proceedings Article | 12 September 2012 Paper

Paper

LINC-NIRVANA: assembly, integration, and verification update

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 8445, 84450V (2012) https://doi.org/10.1117/12.926267

KEYWORDS: Adaptive optics, Stars, Telescopes, Sensors, Wavefronts, Mirrors, Neodymium, Cameras, Optical fabrication, Control systems

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Proceedings Article | 12 September 2012 Paper

Paper

The GRAVITY spectrometers: system design

S. Fischer, C. Straubmeier, C. Araujo-Hauck, S. Yazici, M. Wiest, I. Wank, F. Eisenhauer, G. Perrin, A. Eckart, K. Perraut, W. Brandner, A. Amorim, M. Schöller

Proceedings Volume 8445, 84451W (2012) https://doi.org/10.1117/12.925289

KEYWORDS: Spectrometers, Sensors, Integrated optics, Metrology, Laser metrology, Interfaces, Optical tracking, Optical filters, K band, Spectral resolution

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Proceedings Article | 12 September 2012 Paper

Paper

The GRAVITY spectrometers: metrology laser blocking system

Constanza Araujo-Hauck, Sebastian Fischer, Stefan Gillessen, Christian Straubmeier, Michael Wiest, Senol Yazici, Imke Wank, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, António Amorim, Andreas Eckart

Proceedings Volume 8445, 84452S (2012) https://doi.org/10.1117/12.925151

KEYWORDS: Optical filters, Metrology, K band, Laser metrology, Spectrometers, Absorbance, Integrated optics, Wavefronts, Reflectivity, Laser systems engineering

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Proceedings Article | 26 July 2010 Paper

Paper

The GRAVITY spectrometers: mechanical design

Sebastian Fischer, Michael Wiest, Christian Straubmeier, Senol Yazici, Constanza Araujo-Hauck, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 7739, 77393P (2010) https://doi.org/10.1117/12.856118

KEYWORDS: Spectrometers, Sensors, Laser metrology, Metrology, Optical filters, Integrated optics, Optical alignment, Interfaces, Cameras, Collimators

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Proceedings Article | 22 July 2010 Paper

Paper

Signatures of strong gravity with GRAVITY

A. Eckart, M. Zamaninasab, C. Straubmeier, S. Fischer, C. Araujo-Hauck, M. Garcia-Marin, M. Wiest, G. Witzel, R. Buchholz, N. Sabha, K. Muzic, F. Eisenhauer, T. Paumard, S. Yazici, G. Perrin, W. Brandner, K. Perraut, A. Amorim, M. Schöller

Proceedings Volume 7734, 77340X (2010) https://doi.org/10.1117/12.855955

KEYWORDS: Stars, Near infrared, Polarization, Interferometry, Infrared radiation, Polarimetry, Infrared imaging, Synchrotrons, Interferometers, Telescopes

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Proceedings Article | 22 July 2010 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: control design overview

Steffen Rost, Andreas Eckart, Matthew Horrobin, Bettina Lindhorst, Uwe Lindhorst, Lydia Moser, Semir Smajic, Christian Straubmeier, Evangelia Tremou, Imke Wank, Jens Zuther, Thomas Bertram

Proceedings Volume 7734, 77341V (2010) https://doi.org/10.1117/12.857071

KEYWORDS: Sensors, Point spread functions, Actuators, Adaptive optics, Mirrors, Telescopes, Computing systems, Control systems, Stars, Atmospheric modeling

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Proceedings Article | 22 July 2010 Open Access

Open Access

Paper

GRAVITY: a four telescope beam combiner instrument for the VLTI

S. Gillessen, F. Eisenhauer, G. Perrin, W. Brandner, C. Straubmeier, K. Perraut, A. Amorim, M. Schöller, C. Araujo-Hauck, H. Bartko, H. Baumeister, J.-P. Berger, P. Carvas, F. Cassaing, F. Chapron, E. Choquet, Y. Clenet, C. Collin, A. Eckart, P. Fedou, S. Fischer, E. Gendron, R. Genzel, P. Gitton, F. Gonte, A. Gräter, P. Haguenauer, M. Haug, X. Haubois, T. Henning, S. Hippler, R. Hofmann, L. Jocou, S. Kellner, P. Kervella, R. Klein, N. Kudryavtseva, S. Lacour, V. Lapeyrere, W. Laun, P. Lena, R. Lenzen, J. Lima, D. Moratschke, D. Moch, T. Moulin, V. Naranjo, U. Neumann, A. Nolot, T. Paumard, O. Pfuhl, S. Rabien, J. Ramos, J. Rees, R.-R. Rohloff, D. Rouan, G. Rousset, A. Sevin, M. Thiel, K. Wagner, M. Wiest, S. Yazici, D. Ziegler

Proceedings Volume 7734, 77340Y (2010) https://doi.org/10.1117/12.856689

KEYWORDS: Stars, Adaptive optics, Telescopes, Sensors, Interferometry, Integrated optics, Spectroscopy, Wavefront sensors, Near infrared, Metrology

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Proceedings Article | 22 July 2010 Paper

Paper

The GRAVITY spectrometers: optical design and principle of operation

Christian Straubmeier, Sebastian Fischer, Constanza Araujo-Hauck, Michael Wiest, Senol Yazici, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 7734, 773432 (2010) https://doi.org/10.1117/12.855983

KEYWORDS: Spectrometers, Integrated optics, Spectral resolution, Sensors, Detector arrays, Optical design, Polarization, Channel projecting optics, Metrology, Optical tracking

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Proceedings Article | 22 July 2010 Paper

Paper

Fringe detection and piston variability in LINC-NIRVANA

Matthew Horrobin, Andreas Eckart, Bettina Lindhorst, Uwe Lindhorst, Lydia Moser, Steffen Rost, Semir Smajic, Christian Straubmeier, Evangelia Tremou, Imke Wank, Jens Zuther, Thomas Bertram, Carmelo Arcidiacono

Proceedings Volume 7734, 77341X (2010) https://doi.org/10.1117/12.856863

KEYWORDS: Point spread functions, Stars, Video, Adaptive optics, Fringe analysis, Sensors, Mirrors, Telescopes, Interferometry, Atmospheric sensing

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Proceedings Article | 22 July 2010 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: first measurements of the testbed interferometer

L. Moser, A. Eckart, M. Horrobin, B. Lindhorst, S. Rost, C. Straubmeier, E. Tremou, I. Wank, J. Zuther, T. Bertram

Proceedings Volume 7734, 77342X (2010) https://doi.org/10.1117/12.856654

KEYWORDS: Interferometers, Point spread functions, Interferometry, Mirrors, Telescopes, Actuators, Sensors, Control systems, Halogens, Device simulation

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Proceedings Article | 22 July 2010 Paper

Paper

GRAVITY spectrometer: metrology laser blocking strategy at OD=12

Constanza Araujo-Hauck, Sebastian Fischer, Hendrik Bartko, Stefan Gillessen, Christian Straubmeier, Michael Wiest, Senol Yazici, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, Antonio Amorim, Andreas Eckart

Proceedings Volume 7734, 77342Z (2010) https://doi.org/10.1117/12.856021

KEYWORDS: Optical filters, Metrology, Laser metrology, Spectroscopy, Coating, Infrared cameras, Mirrors, K band, Integrated optics, Absorbance

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Proceedings Article | 22 July 2010 Paper

Paper

Imaging beyond the fringe: an update on the LINC-NIRVANA Fizeau interferometer for the LBT

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7734, 773407 (2010) https://doi.org/10.1117/12.856492

KEYWORDS: Telescopes, Mirrors, Adaptive optics, Interferometry, Wavefront sensors, Interferometers, Visible radiation, Optical benches, Control systems, Fizeau interferometers

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Proceedings Article | 22 July 2010 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: laboratory tests

Evangelia Tremou, Andreas Eckart, Matthew Horrobin, Bettina Lindhorst, Lydia Moser, Steffen Rost, Semir Smajic, Christian Straubmeier, Imke Wank, Jens Zuther, Thomas Bertram

Proceedings Volume 7734, 773441 (2010) https://doi.org/10.1117/12.856731

KEYWORDS: Sensors, Temperature metrology, Cryogenics, Cameras, Interferometry, Aluminum, Computer programming, Reflectivity, Astronomy, Near infrared

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Proceedings Article | 22 July 2010 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: an update of the opto-mechanical system

Jens Zuther, Andreas Eckart, Thomas Bertram, Matthew Horrobin, Bettina Lindhorst, Uwe Lindhorst, Lydia Moser, Steffen Rost, Christian Straubmeier, Evangelia Tremou, Imke Wank

Proceedings Volume 7734, 773448 (2010) https://doi.org/10.1117/12.856861

KEYWORDS: Sensors, Point spread functions, Telescopes, Space telescopes, Interferometry, Head, Atmospheric corrections, Refraction, Mirrors, Adaptive optics

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Proceedings Article | 20 July 2010 Paper

Paper

Prototyping and testing of mechanical components for the GRAVITY spectrometers

Michael Wiest, Sebastian Fischer, Markus Thiel, Marcus Haug, Ralf-Rainer Rohloff, Christian Straubmeier, Constanza Araujo-Hauck, Senol Yazici, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Karine Perraut, Antonio Amorim, Markus Schöller, Andreas Eckart

Proceedings Volume 7739, 77393Q (2010) https://doi.org/10.1117/12.856123

KEYWORDS: Spectrometers, Cryogenics, Sensors, Prototyping, Optical components, Actuators, Computer aided design, Manufacturing, Spectral resolution, Polarimetry

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Proceedings Article | 20 July 2010 Paper

Paper

A compact light-weighted and multi-purpose calibration unit for LINC-NIRVANA

Fulvio De Bonis, Thomas Bertram, Lucas Labadie, Sebastian Egner, Peter Bizenberger, Ralph Hofferbert, Andreas Eckart, Martin Kuerster, Tom Herbst

Proceedings Volume 7735, 773543 (2010) https://doi.org/10.1117/12.857026

KEYWORDS: Mirrors, Calibration, Copper, Telescopes, Interferometry, Sensors, Kinematics, Integrating spheres, Optical benches, Composites

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Proceedings Article | 28 July 2008 Open Access

Open Access

Paper

First spectro-interferometry on galactic center sources in the infrared: results and science prospects at the sensitivity limit of current larger aperture arrays

Jörg-Uwe Pott, Julien Woillez, Peter Wizinowich, Andreas Eckart, Andreas Glindemann, Andrea Ghez, James Graham

Proceedings Volume 7013, 701322 (2008) https://doi.org/10.1117/12.788245

KEYWORDS: Stars, Interferometry, Interferometers, Visibility, Telescopes, Spatial resolution, Near infrared, Infrared radiation, Spectral resolution, Cameras

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Proceedings Article | 28 July 2008 Paper

Paper

Opto-mechanical design of the spectrometers of GRAVITY: the 6-Baseline K-Band Interferometer for the VLTI

Christian Straubmeier, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Andreas Eckart

Proceedings Volume 7013, 701331 (2008) https://doi.org/10.1117/12.787549

KEYWORDS: Spectrometers, Sensors, Spectral resolution, Integrated optics, Detector arrays, Polarimetry, Interferometry, Prisms, K band, Laser metrology

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Proceedings Article | 28 July 2008 Open Access

Open Access

Paper

GRAVITY: getting to the event horizon of Sgr A*

F. Eisenhauer, G. Perrin, W. Brandner, C. Straubmeier, A. Richichi, S. Gillessen, J. P. Berger, S. Hippler, A. Eckart, M. Schöller, S. Rabien, F. Cassaing, R. Lenzen, M. Thiel, Y. Clénet, J. R. Ramos, S. Kellner, P. Fédou, H. Baumeister, R. Hofmann, E. Gendron, A. Boehm, H. Bartko, X. Haubois, R. Klein, K. Dodds-Eden, K. Houairi, F. Hormuth, A. Gräter, L. Jocou, V. Naranjo, R. Genzel, P. Kervella, T. Henning, N. Hamaus, S. Lacour, U. Neumann, M. Haug, F. Malbet, W. Laun, J. Kolmeder, T. Paumard, R.-R. Rohloff, O. Pfuhl, K. Perraut, J. Ziegleder, D. Rouan, G. Rousset

Proceedings Volume 7013, 70132A (2008) https://doi.org/10.1117/12.788407

KEYWORDS: Stars, Telescopes, Near infrared, Adaptive optics, Metrology, Sensors, Interferometry, Integrated optics, Wavefront sensors, Spectroscopy

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Proceedings Article | 28 July 2008 Paper

Paper

LINC-NIRVANA: the Fizeau interferometer for the Large Binocular Telescope

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7013, 701326 (2008) https://doi.org/10.1117/12.788378

KEYWORDS: Telescopes, Interferometry, Modulation transfer functions, Mirrors, Spatial resolution, Interferometers, Point spread functions, Fizeau interferometers, Adaptive optics, Spatial frequencies

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Proceedings Article | 28 July 2008 Paper

Paper

The LINC-NIRVANA Fringe and Flexure Tracker: the testbed interferometer

Thomas Bertram, Bettina Lindhorst, Evangelia Tremou, Steffen Rost, Yeping Wang, Imke Wank, Gunther Witzel, Christian Straubmeier, Andreas Eckart

Proceedings Volume 7013, 701337 (2008) https://doi.org/10.1117/12.788980

KEYWORDS: Point spread functions, Interferometers, Actuators, Mirrors, Telescopes, Control systems, Interferometry, Servomechanisms, Beam splitters, Light sources

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Proceedings Article | 28 July 2008 Paper

Paper

The LINC-NIRVANA fringe and flexure tracking system

Thomas Bertram, Andreas Eckart, Bettina Lindhorst, Steffen Rost, Christian Straubmeier, Evangelia Tremou, Yeping Wang, Imke Wank, Gunther Witzel, Udo Beckmann, Mario Brix, Sebastian Egner, Tom Herbst

Proceedings Volume 7013, 701327 (2008) https://doi.org/10.1117/12.788686

KEYWORDS: Sensors, Point spread functions, Mirrors, Interferometers, Interferometry, Adaptive optics, Cameras, Telescopes, Actuators, Staring arrays

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Proceedings Article | 28 July 2008 Paper

Paper

The LINC-NIRVANA Fringe and Flexure Tracker: testing piston control performance

Steffen Rost, Thomas Bertram, Bettina Lindhorst, Christian Straubmeier, Evangelia Tremou, Yeping Wang, Gunther Witzel, Andreas Eckart

Proceedings Volume 7013, 701338 (2008) https://doi.org/10.1117/12.787896

KEYWORDS: Point spread functions, Sensors, Mirrors, Control systems, Actuators, Device simulation, Filtering (signal processing), Telescopes, Atmospheric optics, Atmospheric modeling

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Proceedings Article | 28 July 2008 Paper

Paper

Prospects for observing the Galactic Center: combining LBT LINC-NIRVANA observations in the near-infrared with observations in the mm/sub-mm wavelength domain

Andreas Eckart, Gunther Witzel, Devaky Kunneriath, Sabine König, Christian Straubmeier, Thomas Bertram, Mohammad Zamaninasab, Rainer Schödel, Koraljka Muzic, Evangelia Tremou, Leonhard Meyer, Steffen Rost, Stuart Vogel, Helmut Wiesemeyer, Lorant Sjouwerman, Tom Herbst

Proceedings Volume 7013, 70134L (2008) https://doi.org/10.1117/12.787557

KEYWORDS: Stars, Near infrared, Infrared imaging, Interferometry, Adaptive optics, Telescopes, X-rays, Observatories, Spatial resolution, Physics

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Proceedings Article | 12 July 2008 Paper

Paper

The JWST MIRI double-prism: design and science drivers

Sebastian Fischer, Damian Moratschke, Christian Straubmeier, Andreas Eckart, Laurence Rossi, Jean-Yves Plesseria, Etienne Renotte, Emmanuel Mazy, Jérôme Amiaux

Proceedings Volume 7010, 70103K (2008) https://doi.org/10.1117/12.788672

KEYWORDS: Prisms, Zinc, James Webb Space Telescope, Spectroscopy, Germanium, Imaging systems, Manufacturing, Tolerancing, Safety, Fermium

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Proceedings Article | 9 July 2008 Paper

Paper

LINC-NIRVANA: achieving 10 mas imagery on the Large Binocular Telescope

T. Herbst, R. Ragazzoni, A. Eckart, G. Weigelt

Proceedings Volume 7014, 70141A (2008) https://doi.org/10.1117/12.788374

KEYWORDS: Mirrors, Telescopes, Adaptive optics, Interferometry, Wavefront sensors, Astronomy, Panoramic photography, Spatial resolution, Radio astronomy, Imaging systems

Read Abstract +

Proceedings Article | 29 June 2006 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: image analysis concept and fringe tracking performance estimate

Thomas Bertram, Carmelo Arcidiacono, Christian Straubmeier, Steffen Rost, Yeping Wang, Andreas Eckart

Proceedings Volume 6268, 62683P (2006) https://doi.org/10.1117/12.671542

KEYWORDS: Stars, Point spread functions, Fringe analysis, Interferometry, Detection and tracking algorithms, Image analysis, Near infrared, Telescopes, V band, Atmospheric corrections

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Proceedings Article | 28 June 2006 Paper

Paper

Interferometric observations of the galactic center: LBT and VLTI

Andreas Eckart, Rainer Schödel, Christian Straubmeier, Thomas Bertram, Jörg-Uwe Pott, Koraljka Muzic, Leonhard Meyer, Jihane Moultaka, Thomas Viehmann, Steffen Rost, Tom Herbst

Proceedings Volume 6268, 62681J (2006) https://doi.org/10.1117/12.670283

KEYWORDS: Stars, Near infrared, Infrared imaging, Interferometry, Adaptive optics, Telescopes, Spatial resolution, Polarization, Spectroscopy, X-rays

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Proceedings Article | 28 June 2006 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: cryo-ambient mechanical design

Thomas Bertram, Harald Baumeister, Werner Laun, Christian Straubmeier, Steffen Rost, Yeping Wang, Andreas Eckart

Proceedings Volume 6268, 62683L (2006) https://doi.org/10.1117/12.671378

KEYWORDS: Sensors, Cryogenics, Head, Point spread functions, Stars, Mechanical engineering, Interferometry, Near infrared, Cameras, Optical filters

Read Abstract +

Proceedings Article | 28 June 2006 Open Access

Open Access

Paper

GRAVITY: the adaptive-optics-assisted two-object beam combiner instrument for the VLTI

S. Gillessen, G. Perrin, W. Brandner, C. Straubmeier, F. Eisenhauer, S. Rabien, A. Eckart, P. Lena, R. Genzel, T. Paumard, S. Hippler

Proceedings Volume 6268, 626811 (2006) https://doi.org/10.1117/12.671431

KEYWORDS: Stars, Telescopes, Wavefront sensors, Interferometry, Infrared radiation, Metrology, Infrared sensors, Infrared telescopes, Adaptive optics, Infrared imaging

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: Linux real-time solutions

Yeping Wang, Thomas Bertram, Christian Straubmeier, Steffen Rost, Andreas Eckart

Proceedings Volume 6274, 62741O (2006) https://doi.org/10.1117/12.671616

KEYWORDS: Computing systems, Image processing, Interferometry, Near infrared, Signal processing, Atmospheric corrections, Sensors, Control systems, Telescopes, Point spread functions

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Paper

The imaging fringe and flexure tracker of LINC-NIRVANA: basic opto-mechanical design and principle of operation

Christian Straubmeier, Thomas Bertram, Andreas Eckart, Steffen Rost, Yeping Wang, Tom Herbst, Roberto Ragazzoni, Gerd Weigelt

Proceedings Volume 6268, 62681I (2006) https://doi.org/10.1117/12.670160

KEYWORDS: Telescopes, Interferometry, Adaptive optics, Sensors, Wavefronts, Point spread functions, Cameras, Mirrors, Optical tracking, Interferometers

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Proceedings Article | 27 June 2006 Paper

Paper

The LINC-NIRVANA fringe and flexure tracker: piston control strategies

Steffen Rost, Thomas Bertram, Christian Straubmeier, Yeping Wang, Andreas Eckart

Proceedings Volume 6274, 62741P (2006) https://doi.org/10.1117/12.671741

KEYWORDS: Mirrors, Sensors, Telescopes, Interferometry, Actuators, Device simulation, Control systems, Atmospheric modeling, Near infrared, Point spread functions

Read Abstract +

Proceedings Article | 15 June 2006 Paper

Paper

Mounting MIRI's double prism

S. Fischer, C. Straubmeier, A. Eckart, L. Rossi, E. Mazy

Proceedings Volume 6265, 62653A (2006) https://doi.org/10.1117/12.670201

KEYWORDS: Prisms, James Webb Space Telescope, Interfaces, Germanium, Imaging systems, Zinc, Imaging spectroscopy, Spectroscopes, Mid-IR, Coating

Read Abstract +

Proceedings Article | 25 October 2004 Paper

Paper

LINC-NIRVANA: the single arm MCAO experiment

Sebastian Egner, Wolfgang Gaessler, Tom Herbst, Roberto Ragazzoni, Remko Stuik, D. Andersen, C. Arcidiacono, H. Baumeister, U. Beckmann, J. Behrend, T. Bertram, P. Bizenberger, H. Boehnhardt, E. Diolaiti, T. Driebe, A. Eckhardt, J. Farinato, M. Kuerster, W. Laun, S. Ligori, Vianak Naranjo, E. Nußbaum, H.-W. Rix, R.-R. Rohloff, Piero Salinari, R. Soci, C. Straubmeier, E. Vernet-Viard, Gerd Weigelt, R. Weiss, W. Xu

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550046

KEYWORDS: Actuators, Telescopes, Mirrors, Adaptive optics, Deformable mirrors, Temperature metrology, Stars, Cameras, Interferometers, Wavefront sensors

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Proceedings Article | 20 October 2004 Paper

Paper

Scientific potential for LINC NIRVANA observations of galactic nuclei

Andreas Eckart, Jens Zuther, Nelly Mouawad, Rainer Schodel, Christian Straubmeier, Thomas Bertram, Joerg-Uwe Pott, Julia Scharwachter, Thomas Herbst

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551228

KEYWORDS: Galactic astronomy, Near infrared, X-rays, Stars, Adaptive optics, Interferometry, X-ray optics, Imaging spectroscopy, Spectroscopy, Spatial resolution

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Proceedings Article | 20 October 2004 Paper

Paper

The fringe and flexure tracking system for LINC-NIRVANA: basic design and principle of operation

Christian Straubmeier, Thomas Bertram, Andreas Eckart, Yibing Wang, Lahbib Zealouk, Thomas Herbst, David Andersen, Roberto Ragazzoni, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551113

KEYWORDS: Interferometry, Telescopes, Sensors, Adaptive optics, Point spread functions, Wavefronts, Control systems, Detector arrays, Spatial resolution, Detection and tracking algorithms

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Proceedings Article | 20 October 2004 Paper

Paper

The LINC-NIRVANA fringe and flexure tracking system: differential piston simulation and detection

Thomas Bertram, David Andersen, Carmelo Arcidiacono, Christian Straubmeier, Andreas Eckart, Udo Beckmann, Thomas Herbst

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551312

KEYWORDS: Point spread functions, Interferometry, Detection and tracking algorithms, Stars, Computer simulations, Algorithm development, Interferometers, Adaptive optics, Device simulation, Atmospheric corrections

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

A feasibility study of future observations with MIDI and other VLTI science instruments: the example of the Galactic Center

Joerg-Uwe Pott, Andreas Glindemann, Andreas Eckart, Markus Schoeller, Christoph Leinert, Thomas Viehmann, Massimo Robberto

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551659

KEYWORDS: Stars, Interferometry, Mid-IR, Infrared imaging, Target acquisition, Visibility, Telescopes, K band, Interferometers, Spatial resolution

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Proceedings Article | 30 September 2004 Paper

Paper

The LINC-NIRVANA interferometric imager for the Large Binocular Telescope

Tom Herbst, Roberto Ragazzoni, Andreas Eckart, Gerd Weigelt

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.551516

KEYWORDS: Telescopes, Sensors, Interferometry, Mirrors, Point spread functions, Cryogenics, Interferometers, Adaptive optics, Turbulence, Imaging systems

Read Abstract +

Proceedings Article | 29 September 2004 Paper

Paper

Positioning of optical elements in the cryogenically cooled mid-infrared instrument MIRI for the James Webb Space Telescope

Dietrich Lemke, Ralph Hofferbert, Ulrich Grozinger, Ralf-Rainer Rohloff, Armin Bohm, Thomas Henning, Armin Huber, Stefan Mertin, Jose Ramos, Gillian Wright, Peter Hastings, Alex Zehnder, Sophie Salasca, Gabby Kroes, Christian Straubmeier, Andreas Eckart

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550398

KEYWORDS: James Webb Space Telescope, Spectroscopy, Mirrors, Sensors, Electronics, Imaging systems, Optical components, Mid-IR, Optical filters, Picture Archiving and Communication System

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Proceedings Article | 7 July 2004 Paper

Paper

LINC-NIRVANA: first attempt of an instrument for a 23-m-class telescope

Wolfgang Gassler, Thomas Herbst, Roberto Ragazzoni, David Andersen, Carmelo Arcidiacono, Harald Baumeister, Udo Beckmann, Thomas Bertram, Peter Bizenberger, Hermann Bohnhardt, Emiliano Diolaiti, Andreas Eckart, Jacopo Farinato, Sebastiano Ligori, Hans-Walter Rix, Ralf-Rainer Rohloff, Piero Salinari, Roberto Soci, Christian Straubmeier, Elise Vernet-Viard, Gerd Weigelt, Robert Weiss, Wenli Xu

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566389

KEYWORDS: Telescopes, Sensors, Adaptive optics, Wavefront sensors, Stars, Collimators, Mirrors, Cameras, Optical instrument design, Deformable mirrors

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Correction of pistonic aberrations at the LBT: a near-infrared fringe and flexure tracker for LINC

Christian Straubmeier, Andreas Eckart, Thomas Bertram, L. Zealouk, Y. Wang

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.456780

KEYWORDS: Interferometry, Telescopes, Cameras, Sensors, Adaptive optics, Point spread functions, Mirrors, Imaging systems, Wavefronts, Detector arrays

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

LINC-NIRVANA: a Fizeau beam combiner for the Large Binocular Telescope

Tom Herbst, Roberto Ragazzoni, David Andersen, H. Boehnhardt, Peter Bizenberger, Andreas Eckart, W. Gaessler, Hans-Walter Rix, Ralf-Rainer Rohloff, Piero Salinari, R. Soci, Christian Straubmeier, W. Xu

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458876

KEYWORDS: Telescopes, Interferometry, Mirrors, Sensors, Adaptive optics, Spatial resolution, Optical design, Space telescopes, Wavefront sensors, Point spread functions

Read Abstract +

Proceedings Article | 16 December 2002 Paper

Paper

Scientific potential for interferometric observations of the Galactic Center

Andreas Eckart, Nelly Mouawad, Melanie Krips, Christian Straubmeier, Thomas Bertram

Proceedings Volume 4835, (2002) https://doi.org/10.1117/12.456449

KEYWORDS: Stars, Interferometry, Infrared imaging, Infrared radiation, Spatial resolution, Interferometers, Near infrared, Telescopes, Cameras, Polarization

Read Abstract +

Proceedings Article | 27 September 1999 Paper

Paper

Calar Alto ALFA and the sodium laser guide star in astronomy

David Butler, Richard Davies, Hayden Fews, Wolfgang Hackenberg, Sebastian Rabien, Thomas Ott, Andreas Eckart, Markus Kasper

Proceedings Volume 3762, (1999) https://doi.org/10.1117/12.363573

KEYWORDS: Sodium, Stars, Laser guide stars, Adaptive optics, Galactic astronomy, Telescopes, Astronomy, Mirrors, Sensors, Wavefronts

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Proceedings Article | 27 September 1999 Paper

Paper

Beam quality and polarization analysis of the ALFA laser at Calar Alto and the influence on brightness and size of the laser guide star

Sebastian Rabien, Richard Davies, Wolfgang Hackenberg, Andreas Eckart, Thomas Ott, David Butler

Proceedings Volume 3762, (1999) https://doi.org/10.1117/12.363594

KEYWORDS: Telescopes, Polarization, Sodium, Laser guide stars, Adaptive optics, Stars, Mirrors, Wavefronts, Distortion, Polarimetry

Read Abstract +

Proceedings Article | 11 September 1998 Paper

Paper

ALFA: first operational experience of the MPE/MPIA laser guide star system for adaptive optics

Richard Davies, Wolfgang Hackenberg, Thomas Ott, Andreas Eckart, Hans-Christoph Holstenberg, Sebastian Rabien, Andreas Quirrenbach, Markus Kasper

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321747

KEYWORDS: Telescopes, Adaptive optics, Sodium, Stars, Laser guide stars, Wavefront sensors, Mirrors, Polarization, Laser systems engineering, Optical benches

Read Abstract +

Proceedings Article | 6 June 1995 Paper

Paper

High-angular-resolution NIR astronomy with large arrays (SHARP I and SHARP II)

Reiner Hofmann, Bernhard Brandl, Andreas Eckart, Frank Eisenhauer, Lowell Tacconi-Garman

Proceedings Volume 2475, (1995) https://doi.org/10.1117/12.211256

KEYWORDS: Cameras, Telescopes, Electronics, Diffraction, Sensors, Adaptive optics, K band, Space telescopes, Clocks, Optical filters

Read Abstract +

Proceedings Article | 9 June 1994 Paper

Paper

Recent results from the imaging beam combiner simulator COSI at the Max-Planck-Institut fuer Extraterrestrische Physik

Andreas Eckart, Torsten Boeker, Reiner Hofmann, Reinhard Katterloher, Andreas Quirrenbach, M. Loewe, Pierre Cruzalebes

Proceedings Volume 2200, (1994) https://doi.org/10.1117/12.177261

KEYWORDS: Telescopes, Device simulation, Optical simulations, Speckle, Image restoration, Calibration, Turbulence, Mirrors, Reconstruction algorithms, Interferometers

Read Abstract +

Proceedings Article | 9 June 1994 Paper

Paper

Design and construction of the Max-Planck-Institut fuer Extraterrestrische Physik beam combiner simulator COSI

Reinhard Katterloher, Torsten Boeker, Andreas Eckart, Reiner Hofmann, Gerhard Jakob, Andreas Quirrenbach, M. Loewe

Proceedings Volume 2200, (1994) https://doi.org/10.1117/12.177262

KEYWORDS: Telescopes, Mirrors, Optical simulations, Device simulation, Cameras, Wavefronts, Light sources, Deformable mirrors, Adaptive optics, Image restoration

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Showing 5 of 74 publications

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