Dr. Christian Straubmeier Profile

Dr. Christian Straubmeier

Scientific Project Manager at Univ. zu Köln

Websites:

Company Website

Publications (109)

Proceedings Article | 29 August 2022 Poster

Grism design for improving the spectral capabilities of GRAVITY+ at the VLTI

Joel Sanchez-Bermudez, Rebeca García-López, Salvador Cuevas, Frank Eisenhauer, Christian Straubmeier, Senol Yazici

Proceedings Volume 12183, 1218324 (2022) https://doi.org/10.1117/12.2630204

KEYWORDS: Interferometers, Spectral resolution, Prisms, Optical filters, Observatories, Laser optics, Large telescopes, Interferometry, Germanium, Astronomy

Proceedings Article | 29 August 2022 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 | 29 August 2022 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 | 26 August 2022 Presentation + Paper

GRAVITY+ Wide: towards hundreds of z ~ 2 AGN

Antonia Drescher, Maximilian Fabricius, Taro Shimizu, Julien Woillez, Pierre Bourget, Felix Widmann, Jinyi Shangguan, Christian Straubmeier, Matthew Horrobin, Nicolas Schuhler, Frank Eisenhauer, Frederic Gonté, Stefan Gillessen, Thomas Ott, Guy Perrin, Thibaut Paumard, Wolfgang Brandner, Laura Kreidberg, Karine Perraut, Jean-Baptiste Le Bouquin, Paulo Garcia, Sebastian Hönig, Denis Defrère, Guillaume Bourdarot, Helmut Feuchtgruber, Reinhard Genzel, Michael Hartl, Frank Haussmann, Dieter Lutz, Nikhil More, Christian Rau, Jonas Sauter, Sinem Uysal, Patrick Wessely, Ekkehard Wieprecht, Lukas Wimmer, Senol Yazici

Proceedings Volume 12183, 121830T (2022) https://doi.org/10.1117/12.2628921

KEYWORDS: Fourier transforms, Visibility, Mirrors, Stars, Atmospheric turbulence, Atmospheric modeling, Adaptive optics, Relays, Turbulence

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Proceedings Article | 26 August 2022 Presentation + Paper

GRAVITY faint: reducing noise sources in GRAVITY+ with a fast metrology attenuation system

Felix Widmann, Stefan Gillessen, Thomas Ott, Taro Shimizu, Frank Eisenhauer, Maximilian Fabricius, Julien Woillez, Frédéric Gonté, Matthew Horrobin, Jingyi Shangguan, Senol Yazici, Guy Perrin, Thibaut Paumard, Wolfgang Brandner, Laura Kreidberg, Christian Straubmeier, Karin Perraut, Jean-Baptiste Le Bouquin, Paulo Garcia, Sebastian Hönig, Denis Defrère, Guillaume Bourdarot, Antonia Drescher, Helmut Feuchtgruber, Reinhard Genzel, Michael Hartl, Dieter Lutz, Nikhil More, Christian Rau, Sinem Uysal, Ekkehard Wieprecht

Proceedings Volume 12183, 121830U (2022) https://doi.org/10.1117/12.2628813

KEYWORDS: Astronomical interferometers, Near infrared, Metrology, Laser metrology, Sensors, Signal to noise ratio, Backscatter, Telescopes, Fourier transforms, Stars, Diodes, Fiber couplers

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Proceedings Article | 26 August 2022 Poster + Paper

Building a GRAVITY+ adaptive optics test bench

Florentin Millour, Philippe Bério, Stéphane Lagarde, Sylvie Robbe-Dubois, Carole Gouvret, Olivier Lai, Fatmé Allouche, Christophe Bailet, Olivier Boebion, Marcel Carbillet, Aurélie Marcotto, Alain Spang, Paul Girard, Nicolas Mauclert, Jean-Baptiste Lebouquin, Thibaut Paumard, Férréol Soulez, Julien Woillez, Nikhil More, Frank Eisenhauer, Christian Straubmeier, Laura Kreidberg, Paulo Garcia, Sebastian Hoenig

Proceedings Volume 12183, 121831X (2022) https://doi.org/10.1117/12.2627105

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Device simulation, Point spread functions, Computer aided design, Deformable mirrors, Optical simulations, Wavefront sensors, Optical testing, Astronomical interferometry, Long baseline optical interferometry

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Proceedings Article | 15 January 2021 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 | 16 December 2020 Presentation + Paper

The ExoGRAVITY project: using single mode interferometry to characterize exoplanets

S. Lacour, J. Wang, M. Nowak, L. Pueyo, F. Eisenhauer, A.-M. Lagrange, P. Mollière, R. Abuter, A. Amorin, R. Asensio-Torres, M. Bauböck, M. Benisty, J. P. Berger, H. Beust, S. Blunt, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, E. Choquet, V. Christiaens, Y. Clénet, A. Cridland, P. T. de Zeeuw, R. Dembet, J. Dexter, A. Drescher, G. Duvert, F. Gao, P. Garcia, R. Garcia Lopez, T. Gardner, E. Gendron, R. Genzel, S. Gillessen, J. H. Girard, X. Haubois, G. Heißel, T. Henning, S. Hinkley, S. Hippler, M. Horrobin, M. Houllé, Z. Hubert, A. Jiménez-Rosales, L. Jocou, J. Kammerer, M. Keppler, P. Kervella, L. Kreidberg, V. Lapeyrère, J.-B. Le Bouquin, P. Léna, D. Lutz, A.-L. Maire, A. Mérand, J. D. Monnier, D. Mouillet, A. Muller, E. Nasedkin, T. Ott, G. P. P. L. Otten, C. Paladini, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, J. Rameau, L. Rodet, G. Rodriguez-Coira, G. Rousset, J. Shangguan, T. Shimizu, J. Stadler, O. Straub, C. Straubmeier, E. Sturm, T. Stolker, E. van Dishoeck, A. Vigan, F. Vincent, S. D. von Fellenberg, K. Ward-Duong, F. Widmann, E. Wieprecht, E. Wiezorrek, J. Woillez

Proceedings Volume 11446, 114460O (2020) https://doi.org/10.1117/12.2561667

KEYWORDS: Interferometry, Exoplanets

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Proceedings Article | 13 December 2020 Presentation

First four telescopes large-separation off-axis fringe-tracking interferometry with GRAVITY at the VLTI

Feng Gao, Frank Eisenhauer, Julien Woillez, Pierre Bourget, Bruno Chazelas, Roderick Dembet, Frédéric Gonté, Jürgen Ott, Nicolas Schuhler, Gérard Zins, Frank Haussmann, Michael Hartl, Stefan Gillessen, Reinhard Genzel, Guy Perrin, Wolfgang Brandner, Thibaut Paumard, Karine Perraut, Paulo J. Garcia, Christian Straubmeier, António Amorim, Thomas Ott, Felix Widmann, Jinyi Shangguan, Odèle Straub, Sebastiano von Fellenberg, Eckhard Sturm, Oliver Pfuhl, Michi Bauboeck, Alejandra Jimenez-Rosales, Matthew Horrobin, Julia Stadler, Dieter Lutz, Taro Shimizu, Antonia Drescher, Mari Lena Bolzer

Proceedings Volume 11446, 114461I (2020) https://doi.org/10.1117/12.2561408

KEYWORDS: Telescopes, Interferometry, Interferometers, Atmospheric turbulence, Optical interferometry, Large telescopes, Stars

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Proceedings Article | 13 December 2020 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 | 13 December 2020 Presentation

Polarization analysis of GRAVITY and the VLTI

Felix Widmann, Frank Eisenhauer, Oliver Pfuhl, Nicolas Schuhler, Xavier Haubois, António Amorim, Michi Bauböck, Wolfgang Brandner, Jason Dexter, Feng Gao, Paulo J. Garcia, Reinhard Genzel, Stefan Gillessen, Alejandra Jimenez-Rosales, Sylvestre Lacour, Thomas Ott, Karine Perraut, Guy Perrin, Jinyi Shangguan, Odèle Straub, Christian Straubmeier, Eckhard Sturm, Sebastiano von Fellenberg

Proceedings Volume 11446, 114460S (2020) https://doi.org/10.1117/12.2559311

KEYWORDS: Polarization, Data modeling, Polarization analysis, Calibration, Signal attenuation, Birefringence, Polarimetry, Telescopes, Mirrors, Device simulation

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Proceedings Article | 13 December 2020 Poster + Paper

The warm calibration unit of METIS: laboratory tests and proof-of-concept

Sabine Graf, Monika Rutowska, Michael Wiest, Steffen Rost, Christian Straubmeier, Lucas Labadie

Proceedings Volume 11447, 114472R (2020) https://doi.org/10.1117/12.2562106

KEYWORDS: Calibration, Integrating spheres, Black bodies, Mid-IR, Imaging systems, Spectrographs, Astronomy, Cameras, Manufacturing, Optical spheres

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Proceedings Article | 13 December 2020 Presentation

Static phase aberrations in near-IR interferometry and GRAVITY's determination of the galactic center distanceStatic phase aberrations in near-IR interferometry and GRAVITY's determination of the galactic center distance

Julia Stadler, Guy Perin, Wolfgang Brandner, Christian Straubmeier, Karine Rousselet-Perraut, António Amorim, Paulo Garcia, Frank Eisenhauer, Michael Bauböck, Feng Gao, Reinhard Genzel, Stefan Gillessen, Alejandra Jimenez-Rosales, Thomas Ott, Jinyi Shangguan, Odèle Straub, Eckhard Sturm, Sebastiano von Fellenberg, Felix Widmann, Oliver Pfuhl, Sylvestre Lacour, Julien Woillez, Mathias Nowak

Proceedings Volume 11446, 114460M (2020) https://doi.org/10.1117/12.2576225

KEYWORDS: Interferometry, Visibility, Phase measurement, Calibration, Zernike polynomials, Superposition, Phase interferometry, Integrated optics, Control systems

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Proceedings Article | 11 July 2018 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 | 11 July 2018 Paper

End to end optical design and wavefront error simulation of METIS

Tibor Agócs, Sara Zuccon, Willem Jellema, Joost van den Born, Rik ter Horst, Peter Bizenberger, M. Concepcion Cardenas Vazquez, Stephen Todd, Nicola Baccichet, Christian Straubmeier

Proceedings Volume 10702, 107029O (2018) https://doi.org/10.1117/12.2313434

KEYWORDS: Monte Carlo methods, Spatial frequencies, Wavefronts, Error analysis, Zernike polynomials, Optics manufacturing, Optical design, Imaging systems, Spectrographs

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Proceedings Article | 10 July 2018 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 | 10 July 2018 Presentation

Data reduction of the VLTI/GRAVITY interferometric instrument (Conference Presentation)

Vincent Lapeyrère, Pierre Kervella, Jean-Baptiste Le Bouquin, Sylvestre Lacour, Cesar Enrique Garcia-Dabó, Antoine Mérand, Julien Woillez, Guy Perrin, Frank Eisenhauer, Karine Perraut, Christian Straubmeier, António Amorim, Wolfgang Brandner

Proceedings Volume 10701, 107011F (2018) https://doi.org/10.1117/12.2314239

KEYWORDS: Interferometry, Fourier transforms, Information operations, Phase measurement, Algorithm development, Software development, Telescopes, Interferometers, Integrated optics, Signal processing

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Proceedings Article | 9 July 2018 Open Access

Improving GRAVITY towards observations of faint targets

Felix Widmann, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karin Perraut, Antonio Amorim, Markus Schöller, Feng Gao, Reinhard Genzel, Stefan Gillessen, Martina Karl, Sylvestre Lacour, Magdalena Lippa, Thomas Ott, Oliver Pfuhl, Philipp Plewa, Idel Waisberg

Proceedings Volume 10701, 107010K (2018) https://doi.org/10.1117/12.2312118

KEYWORDS: Signal to noise ratio, Calibration, Data modeling, Systems modeling, Telescopes, Atmospheric modeling, Interferometers, Interferometry

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Proceedings Article | 9 July 2018 Paper

Correction of differential chromatic dispersion in GRAVITY

Xavier Haubois, Sylvestre Lacour, Guy Perrin, Roderick Dembet, Jean-Baptiste Le Bouquin, Vincent Lapeyrère, Burkhard Wolff, Frank Eisenhauer, Karine Rousselet-Perraut, Christian Straubmeier, Antonio Amorim, Wolfgang Brandner

Proceedings Volume 10701, 107011P (2018) https://doi.org/10.1117/12.2312154

KEYWORDS: Optical fibers, Fourier transforms, Phase measurement, Dispersion, Metrology, K band, Calibration, Refractive index

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Proceedings Article | 9 July 2018 Open Access

Learnings from the use of fiber optics in GRAVITY

Magdalena Lippa, Stefan Gillessen, Nicolas Blind, Yitping Kok, Karine Perraut, Laurent Jocou, Frank Eisenhauer, Oliver Pfuhl, Marcus Haug, Stefan Kellner, Frank Haußmann, Markus Plattner, Christian Rau, Oliver Hans, Ekkehard Wieprecht, Thomas Ott, Erich Wiezorrek, Eckhard Sturm, Alexander Buron, Sylvestre Lacour, Reinhard Genzel, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Antonio Amorim

Proceedings Volume 10701, 107011Y (2018) https://doi.org/10.1117/12.2312477

KEYWORDS: Metrology, Connectors, Polarization, Backscatter, Fiber lasers, Raman scattering, Laser metrology, Luminescence, Fiber optics, Glasses

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Proceedings Article | 9 July 2018 Presentation + Paper

The GRAVITY fringe tracker: correlation between optical path residuals and atmospheric parameters

S. Lacour, R. Dembet, R. Abuter, P. Fedou, G. Perrin, F. Eisenhauer, K. Perraut, C. Straubmeier, W. Brandner, A. Amorim

Proceedings Volume 10701, 1070107 (2018) https://doi.org/10.1117/12.2313004

KEYWORDS: Atmospheric optics, Optical tracking, Fourier transforms, Astronomy, Stars, Physics, Telescopes, Calibration, Observatories

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Proceedings Article | 4 August 2016 Paper

GRAVITY acquisition camera: characterization results

Narsireddy Anugu, Paulo Garcia, Antonio Amorim, Erich Wiezorrek, Ekkehard Wieprecht, Frank Eisenhauer, Thomas Ott, Oliver Pfuhl, Paulo Gordo, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9907, 990727 (2016) https://doi.org/10.1117/12.2233315

KEYWORDS: Stars, Cameras, Telescopes, Optical tracking, Imaging systems, Sensors, Electroluminescent displays, Image sensors, Actuators, Mirrors

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Proceedings Article | 4 August 2016 Open Access

The metrology system of the VLTI instrument GRAVITY

Magdalena Lippa, Stefan Gillessen, Nicolas Blind, Yitping Kok, Şenol Yazıcı, Johannes Weber, Oliver Pfuhl, Marcus Haug, Stefan Kellner, Ekkehard Wieprecht, Frank Eisenhauer, Reinhard Genzel, Oliver Hans, Frank Haußmann, David Huber, Tobias Kratschmann, Thomas Ott, Markus Plattner, Christian Rau, Eckhard Sturm, Idel Waisberg, Erich Wiezorrek, Guy Perrin, Karine Perraut, Wolfgang Brandner, Christian Straubmeier, Antonio Amorim

Proceedings Volume 9907, 990722 (2016) https://doi.org/10.1117/12.2232272

KEYWORDS: Metrology, Telescopes, Signal detection, Laser metrology, Sensors, Beam splitters, Phase shifts, Phase measurement, Receivers, Diodes

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Proceedings Article | 27 July 2016 Paper

System tests and on-sky commissioning of the GRAVITY-CIAO wavefront sensors

C. Deen, J. Kolb, S. Oberti, H. Bonnet, E. Müller, Z. Hubert, G. Zins, F. Delplancke, P. Haguenauer, L. Pettazzi, P. Bourget, M. Suarez-Valles, S. Scheithauer, A. Huber, M. Esselborn, Y. Clenét, E. Gendron, W. Brandner, R. Klein, R. Lenzen, Udo Neumann, M. Kulas, J. Panduro, J. Ramos, R.-R. Rohloff, T. Henning, K. Perraut, G. Perrin, C. Straubmeier, A. Amorim, F. Eisenhauer

Proceedings Volume 9909, 99092M (2016) https://doi.org/10.1117/12.2233005

KEYWORDS: Wavefront sensors, Telescopes, Adaptive optics, Stars, Infrared radiation, Mirrors, Control systems, Mendelevium, Matrices, Shape memory alloys

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Proceedings Article | 7 August 2014 Paper

Integration and bench testing for the GRAVITY Coudé IR adaptive optics (CIAO) wavefront sensor

C. Deen, P. Yang, A. Huber, M. Suarez-Valles, S. Hippler, W. Brandner, E. Gendron, Y. Clénet, S. Kendrew, A. Glauser, R. Klein, W. Laun, R. Lenzen, U. Neumann, J. Panduro, J. Ramos, R.-R. Rohloff, A. Salzinger, N. Zimmerman, T. Henning, K. Perraut, G. Perrin, C. Straubmeier, A. Amorim, F. Eisenhauer

Proceedings Volume 9148, 91482T (2014) https://doi.org/10.1117/12.2055127

KEYWORDS: Adaptive optics, Sensors, Wavefront sensors, Computing systems, Mirrors, Real-time computing, Infrared radiation, Infrared sensors, Deformable mirrors, Telescopes

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Proceedings Article | 28 July 2014 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

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

Telescope birefringence and phase errors in the Gravity instrument at the VLT interferometer

B. Lazareff, N. Blind, L. Jocou, F. Eisenhauer, K. Perraut, S. Lacour, F. Delplancke, M. Schoeller, A. Amorim, W. Brandner, G. Perrin, C. Straubmeier

Proceedings Volume 9146, 91460X (2014) https://doi.org/10.1117/12.2056304

KEYWORDS: Polarization, Mirrors, Birefringence, Sensors, Telescopes, Fourier transforms, Interferometers, Polarimetry, Error analysis, Interferometry

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Proceedings Article | 24 July 2014 Open Access

The GRAVITY metrology system: narrow-angle astrometry via phase-shifting interferometry

Magdalena Lippa, Nicolas Blind, Stefan Gillessen, Yitping Kok, Johannes Weber, Frank Eisenhauer, Oliver Pfuhl, Annemieke Janssen, Marcus Haug, Frank Haußmann, Stefan Kellner, Oliver Hans, Ekkehard Wieprecht, Thomas Ott, Leonard Burtscher, Reinhard Genzel, Eckhard Sturm, Reiner Hofmann, S. Huber, David Huber, Stefanie Senftleben, Andreas Pflüger, Roland Greßmann, Guy Perrin, Karine Perraut, Wolfgang Brandner, Christian Straubmeier, Antonio Amorim, Markus Schöller

Proceedings Volume 9146, 914622 (2014) https://doi.org/10.1117/12.2054637

KEYWORDS: Phase shifts, Metrology, Phase shift keying, Calibration, Telescopes, Modulation, Phase interferometry, Interferometers, Interferometry, Phase measurement

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Proceedings Article | 24 July 2014 Paper

The beam combiners of Gravity VLTI instrument: concept, development, and performance in laboratory

L. Jocou, K. Perraut, T. Moulin, Y. Magnard, P. Labeye, V. Lapras, A. Nolot, G. Perrin, F. Eisenhauer, C. Holmes, A. Amorim, W. Brandner, C. Straubmeier

Proceedings Volume 9146, 91461J (2014) https://doi.org/10.1117/12.2054159

KEYWORDS: Information operations, Interferometry, Integrated optics, K band, Waveguides, Metrology, Modulation, Telescopes, Fourier transforms, Sensors

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Proceedings Article | 24 July 2014 Paper

The interferometric baselines and GRAVITY astrometric error budget

S. Lacour, F. Eisenhauer, S. Gillessen, O. Pfuhl, Y. Kok, G. Perrin, K. Rousselet-Perraut, C. Straubmeier, W. Brandner, A. Amorin, J. Woillez, H. Bonnet

Proceedings Volume 9146, 91462E (2014) https://doi.org/10.1117/12.2057366

KEYWORDS: Metrology, Telescopes, Interferometry, Stars, Interferometers, Space telescopes, Observatories, Optical testing, Mirrors, 3D metrology

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Proceedings Article | 24 July 2014 Paper

Phase tracking with differential dispersion

Xavier Haubois, Sylvestre Lacour, Guy Perrin, Roderick Dembet, Pierre Fedou, Frank Eisenhauer, Karine Rousselet-Perraut, Christian Straubmeier, Antonio Amorim, Wolfgang Brandner

Proceedings Volume 9146, 91461Y (2014) https://doi.org/10.1117/12.2056410

KEYWORDS: Optical fibers, Refractive index, Phase measurement, K band, Dispersion, Detection and tracking algorithms, Colorimetry, Fourier transforms, Humidity, Optical tracking

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Proceedings Article | 24 July 2014 Paper

GRAVITY data reduction software

V. Lapeyrere, P. Kervella, S. Lacour, N. Azouaoui, C. Garcia-Dabo, G. Perrin, F. Eisenhauer, K. Perraut, C. Straubmeier, A. Amorim, W. Brandner

Proceedings Volume 9146, 91462D (2014) https://doi.org/10.1117/12.2056850

KEYWORDS: Calibration, Visibility, Fourier transforms, Metrology, Target acquisition, Phase measurement, Data modeling, Cameras, Interferometry, Spectroscopy

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Proceedings Article | 24 July 2014 Open Access

The GRAVITY instrument software/hardware related aspects

Thomas Ott, Ekkehard Wieprecht, Leonard Burtscher, Yitping Kok, Senol Yazici, Narsireddy Anugu, Roderick Dembet, Pierre Fedou, Sylvestre Lacour, Jürgen Ott, Frank Eisenhauer, Nicolas Blind, Reinhard Genzel, Stefan Gillessen, Oliver Hans, Marcus Haug, Frank Haussmann, Stefan Huber, Annemieke Janssen, Stefan Kellner, Magdalena Lippa, Oliver Pfuhl, Eckhard Sturm, Johannes Weber, Antonio Amorim, Wolfgang Brandner, Karine Rousselet-Perraut, Guy Perrin, Christian Straubmeier, Markus Schöller, Roberto Abuter

Proceedings Volume 9146, 91462A (2014) https://doi.org/10.1117/12.2055927

KEYWORDS: Sensors, Lamps, Camera shutters, Control systems, Analog electronics, Metrology, Detection and tracking algorithms, Optical fibers, Fiber lasers, Laser metrology

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Proceedings Article | 24 July 2014 Open Access

GRAVITY: the impact of non-common optical paths within the metrology system

Yitping Kok, Stefan Gillessen, Sylvestre Lacour, Frank Eisenhauer, Nicolas Blind, Johannes Weber, Magdalena Lippa, Oliver Pfuhl, Leonard Burtscher, Ekkehard Wieprecht, Thomas Ott, Marcus Haug, Stefan Kellner, Frank Haussmann, Eckhard Sturm, Annemieke Janssen, Reinhard Genzel, Guy Perrin, Karine Perraut, Christian Straubmeier, Wolfgang Brandner, Antonio Amorim, Oliver Hans

Proceedings Volume 9146, 914625 (2014) https://doi.org/10.1117/12.2055567

KEYWORDS: Metrology, Stars, Laser metrology, Interferometers, Telescopes, Information operations, Visibility, Sensors, Phase shifts, Time metrology

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Proceedings Article | 24 July 2014 Open Access

The GRAVITY instrument software/high-level software

Leonard Burtscher, Ekkehard Wieprecht, Thomas Ott, Yitping Kok, Senol Yazici, Narsireddy Anugu, Roderick Dembet, Pierre Fedou, Sylvestre Lacour, Jürgen Ott, Thibaut Paumard, Vincent Lapeyrere, Pierre Kervella, Roberto Abuter, Eszter Pozna, Frank Eisenhauer, Nicolas Blind, Reinhard Genzel, Stefan Gillessen, Oliver Hans, Marcus Haug, Frank Haussmann, Stefan Kellner, Magdalena Lippa, Oliver Pfuhl, Eckhard Sturm, Johannes Weber, Antonio Amorim, Wolfgang Brandner, Karine Rousselet-Perraut, Guy Perrin, Christian Straubmeier, Markus Schöller

Proceedings Volume 9146, 91462B (2014) https://doi.org/10.1117/12.2055928

KEYWORDS: Sensors, Process control, Control systems, Cameras, Telescopes, Signal detection, Data acquisition, Computing systems, Interferometers, Interfaces

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Proceedings Article | 24 July 2014 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

The GRAVITY metrology system: modeling a metrology in optical fibers

N. Blind, Heinrich Huber, F. Eisenhauer, J. Weber, S. Gillessen, M. Lippa, L. Burtscher, O. Hans, M. Haug, F. Haussmann, S. Huber, A. Janssen, S. Kellner, Y. Kok, T. Ott, O. Pfuhl, E. Sturm, E. Wieprecht, A. Amorim, W. Brandner, G. Perrin, K. Perraut, C. Straubmeier

Proceedings Volume 9146, 914624 (2014) https://doi.org/10.1117/12.2055553

KEYWORDS: Metrology, Phase modulation, Polarization, Waveguides, Polarizers, Cameras, Connectors, Temperature metrology, Birefringence, Laser metrology

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Proceedings Article | 24 July 2014 Paper

GRAVITY: the calibration unit

N. Blind, F. Eisenhauer, M. Haug, S. Gillessen, Magdalena Lippa, L. Burtscher, O. Hans, F. Haussmann, S. Huber, A. Janssen, S. Kellner, Y. Kok, T. Ott, O. Pfuhl, E. Sturm, J. Weber, E. Wieprecht, A. Amorim, W. Brandner, G. Perrin, K. Perraut, C. Straubmeier

Proceedings Volume 9146, 91461U (2014) https://doi.org/10.1117/12.2055542

KEYWORDS: Calibration, Mirrors, Telescopes, Stars, Metrology, Wavefronts, Light sources, Relays, Optical alignment, Safety

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Proceedings Article | 24 July 2014 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

The fiber coupler and beam stabilization system of the GRAVITY interferometer

O. Pfuhl, M. Haug, F. Eisenhauer, S. Kellner, F. Haussmann, G. Perrin, S. Gillessen, C. Straubmeier, T. Ott, K. Rousselet-Perraut, A. Amorim, Magdalena Lippa, A. Janssen, W. Brandner, Yitping Kok, N. Blind, L. Burtscher, E. Sturm, E. Wieprecht, M. Schoeller, J. Weber, O. Hans, S. Huber

Proceedings Volume 9146, 914623 (2014) https://doi.org/10.1117/12.2055080

KEYWORDS: Telescopes, Fiber couplers, Actuators, Mirrors, Prisms, Adaptive optics, Sensors, Cameras, Stars, Interferometers

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Proceedings Article | 24 July 2014 Paper

Integration and testing of the GRAVITY infrared camera for multiple telescope optical beam analysis

Paulo Gordo, Antonio Amorim, Jorge Abreu, Frank Eisenhauer, Narsireddy Anugu, Paulo Garcia, Oliver Pfuhl, Marcus Haug, Eckhard Sturm, Ekkehard Wieprecht, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut, M. Duarte Naia, M. Guimarães

Proceedings Volume 9146, 91461V (2014) https://doi.org/10.1117/12.2056572

KEYWORDS: Cameras, Telescopes, Beam analyzers, Sensors, Optical alignment, Optics manufacturing, Mirrors, Imaging systems, Silica, Beam splitters

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Proceedings Article | 24 July 2014 Paper

The GRAVITY/VLTI acquisition camera software

Narsireddy Anugu, Paulo J. Garcia, Ekkehard Wieprecht, Antonio Amorim, Leonard Burtscher, Thomas Ott, Paulo Gordo, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9146, 91462C (2014) https://doi.org/10.1117/12.2055831

KEYWORDS: Imaging systems, Cameras, Telescopes, Sensors, Image sensors, Refraction, Stars, Wavefronts, Device simulation, Databases

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Proceedings Article | 24 July 2014 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 | 21 July 2014 Paper

Near-infrared aberration tracking using a correlation algorithm on the Galactic Center

Narsireddy Anugu, Paulo Garcia, Antonio Amorim, Paulo Gordo, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9148, 91485B (2014) https://doi.org/10.1117/12.2055869

KEYWORDS: Sensors, Wavefronts, Image sensors, Wavefront sensors, Telescopes, Reconstruction algorithms, Detection and tracking algorithms, Electroluminescent displays, Adaptive optics, Wavefront aberrations

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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

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 | 24 September 2012 Paper

The GRAVITY Coudé Infrared Adaptive Optics (CIAO) system for the VLT Interferometer

S. Kendrew, S. Hippler, W. Brandner, Y. Clénet, C. Deen, E. Gendron, A. Huber, R. Klein, W. Laun, R. Lenzen, V. Naranjo, Udo Neumann, J. Ramos, R.-R. Rohloff, P. Yang, F. Eisenhauer, A. Amorim, K. Perraut, G. Perrin, C. Straubmeier, Enrico Fedrigo, Marcos Suarez Valles

Proceedings Volume 8446, 84467W (2012) https://doi.org/10.1117/12.926558

KEYWORDS: Adaptive optics, Wavefront sensors, Sensors, Stars, Telescopes, Monte Carlo methods, Interferometers, Infrared radiation, Wavefronts, Near infrared

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Proceedings Article | 13 September 2012 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

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

The final design of the GRAVITY acquisition camera and associated VLTI beam monitoring strategy

Antonio Amorim, Jorge Lima, Narsireddy Anugu, Frank Eisenhauer, Alexander Graeter, Marcus Haug, Thomas Ott, Oliver Pfuhl, Markus Thiel, Ekkehard Wieprecht, Pedro Carvas, Paulo Garcia, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 8445, 844534 (2012) https://doi.org/10.1117/12.925993

KEYWORDS: Sensors, Cameras, Imaging systems, Telescopes, Lenses, Beam analyzers, Metrology, Semiconductor lasers, Mirrors, Image sensors

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Proceedings Article | 12 September 2012 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

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 | 12 September 2012 Paper

GRAVITY: beam stabilization and light injection subsystems

O. Pfuhl, M. Haug, F. Eisenhauer, D. Penka, A. Amorim, S. Kellner, S. Gillessen, T. Ott, E. Wieprecht, E. Sturm, F. Haußmann, S. Huber, M. Lippa, L. Burtscher, K. Rousselet-Perraut, C. Straubmeier, G. Perrin, W. Brandner

Proceedings Volume 8445, 84451U (2012) https://doi.org/10.1117/12.925391

KEYWORDS: Fiber couplers, Mirrors, Cameras, Actuators, Telescopes, Sensors, Diodes, Prisms, Receivers, Stars

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Proceedings Article | 12 September 2012 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

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

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

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

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

The integrated optics beam combiner assembly of the GRAVITY/VLTI instrument

L. Jocou, K. Perraut, A. Nolot, T. Moulin, Y. Magnard, P. Labeye, V. Lapras, F. Eisenhauer, G. Perrin, A. Amorim, W. Brandner, C. Straubmeier

Proceedings Volume 8445, 84452X (2012) https://doi.org/10.1117/12.925556

KEYWORDS: Information operations, Waveguides, Interferometry, Prototyping, K band, Doping, Plasma enhanced chemical vapor deposition, Integrated optics, Phase shifts, Telescopes

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Proceedings Article | 12 September 2012 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 | 29 July 2010 Paper

Dimensioning the Gravity adaptive optics wavefront sensor

Y. Clénet, E, Gendron, G. Rousset, S, Hippler, F. Eisenhauer, S. Gillessen, G. Perrin, A. Amorim, W. Brandner, K. Perraut, C. Straubmeier

Proceedings Volume 7736, 77364A (2010) https://doi.org/10.1117/12.856661

KEYWORDS: Adaptive optics, Optical filters, Mirrors, Wavefront sensors, Signal to noise ratio, Wavefronts, Sensors, Computer simulations, Calibration, Telescopes

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Proceedings Article | 26 July 2010 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 Open Access

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

The fringe detection laser metrology for the GRAVITY interferometer at the VLTI

H. Bartko, S. Gillessen, S. Rabien, M. Thiel, A. Gräter, M. Haug, S. Kellner, F. Eisenhauer, S. Lacour, C. Straubmeier, J.-P. Berger, L. Jocou, W. Chibani, S. Lüst, D. Moch, O. Pfuhl, W. Fabian, C. Araujo-Hauck, K. Perraut, W. Brandner, G. Perrin, A. Amorim

Proceedings Volume 7734, 773421 (2010) https://doi.org/10.1117/12.856698

KEYWORDS: Metrology, Calibration, Phase shifts, Laser metrology, Infrared cameras, Diodes, Telescopes, Sensors, Phase measurement, Cameras

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Proceedings Article | 22 July 2010 Paper

The GRAVITY acquisition and guiding system

Antonio Amorim, Jorge Lima, Oliver Pfuhl, Frank Eisenhauer, Stefan Kellner, Marcus Haug, Markus Thiel, Pedro Carvas, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Jean-Philippe Berger

Proceedings Volume 7734, 773415 (2010) https://doi.org/10.1117/12.856907

KEYWORDS: Cameras, Sensors, Mirrors, Imaging systems, Stars, Telescopes, Control systems, Adaptive optics, Laser systems engineering, Laser scattering

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Proceedings Article | 22 July 2010 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

The Fiber Coupler subsystem of the future VLTI instrument GRAVITY

O. Pfuhl, F. Eisenhauer, M. Haug, M. Thiel, S. Kellner, A. Amorim, W. Brandner, J. P. Berger, K. Rousselet-Perraut, G. Perrin, C. Straubmeier, S. Gillessen, H. Bartko, A. Gräter

Proceedings Volume 7734, 77342A (2010) https://doi.org/10.1117/12.857506

KEYWORDS: Fiber couplers, Actuators, Mirrors, Prisms, Polarization, Telescopes, Single mode fibers, Cameras, Interferometry, Optical design

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Proceedings Article | 22 July 2010 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

GRAVITY: design and performance of the fringe tracker

E. Choquet, F. Cassaing, G. Perrin, F. Eisenhauer, W. Brandner, C. Straubmeier, K. Perraut, S. Gillessen

Proceedings Volume 7734, 77341Z (2010) https://doi.org/10.1117/12.855984

KEYWORDS: Algorithm development, Infrared radiation, Interferometry, Current controlled current source, Tin, Telescopes, K band, Stars, Computer simulations, Detection and tracking algorithms

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Proceedings Article | 22 July 2010 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

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

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

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

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 | 22 July 2010 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 | 20 July 2010 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 | 28 July 2008 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

Fringe detection laser metrology for differential astrometric stellar interferometers

S. Rabien, S. Gillessen, J. Ziegleder, Markus Thiel, Alex Gräter, Marcus Haug, F. Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier

Proceedings Volume 7013, 70130I (2008) https://doi.org/10.1117/12.788099

KEYWORDS: Metrology, Phase measurement, Interferometers, Mirrors, Telescopes, Fringe analysis, Stars, Light scattering, Calibration, Laser metrology

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Proceedings Article | 28 July 2008 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

Fringe tracking optimization with 4 beams: application to GRAVITY

K. Houairi, F. Cassaing, G. Perrin, F. Eisenhauer, W. Brandner, C. Straubmeier, S. Gillessen

Proceedings Volume 7013, 70131B (2008) https://doi.org/10.1117/12.790967

KEYWORDS: Sensors, Phase measurement, Stars, Interferometers, Atmospheric propagation, Atmospheric modeling, Detection and tracking algorithms, Adaptive optics, Demodulation, Visibility

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Proceedings Article | 28 July 2008 Open Access

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

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

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 | 28 July 2008 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 | 25 July 2008 Paper

Manufacturing and verification of ZnS and Ge prisms for the JWST MIRI imager

Laurence Rossi, Jean-François Jamoye, Etienne Renotte, Emmanuel Mazy, Jean-Yves Plesseria, Nathalie Ninane, Marc Wielandts, Sebastian Fischer, Christian Straubmeier, Jean-Louis Augueres, Didier Dubreuil, Jérôme Amiaux, Sébastien Poupar, Samuel Ronayette

Proceedings Volume 7018, 701823 (2008) https://doi.org/10.1117/12.789148

KEYWORDS: Prisms, Germanium, Zinc, Interfaces, Optics manufacturing, Imaging systems, Polishing, James Webb Space Telescope, Coating, Integrated optics

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Proceedings Article | 12 July 2008 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 | 29 June 2006 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

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

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Proceedings Article | 28 June 2006 Open Access

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

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Proceedings Article | 28 June 2006 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 | 27 June 2006 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

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Proceedings Article | 27 June 2006 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

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

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Proceedings Article | 15 June 2006 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

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Proceedings Article | 25 October 2004 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 | 25 October 2004 Paper

LINC-NIRVANA: how to get a 23-m wavefront nearly flat

Wolfgang Gaessler, Roberto Ragazzoni, Thomas Herbst, David Andersen, Carmelo Arcidiacono, Harald Baumeister, Udo Beckmann, Jan Behrend, Thomas Bertram, Peter Bizenberger, Hermann Bohnhardt, F. Briegel, Emiliano Diolaiti, Thomas Driebe, A. Eckhardt, Sebastian Egner, Jacopo Farinato, Matthias Heininger, M. Kürster, Werner Laun, Sebastiano Ligori, Vianak Naranjo, Edmund Nussbaum, Hans-Walter Rix, Ralf-Rainer Rohloff, Piero Salinari, Roberto Soci, Clemens Storz, Christian Straubmeier, Elise Vernet-Viard, Gerd Weigelt, Robert Weiss, Wenli Xu

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551908

KEYWORDS: Stars, Telescopes, Sensors, Wavefront sensors, Adaptive optics, Mirrors, Actuators, Wavefronts, Interferometry, Turbulence

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Proceedings Article | 20 October 2004 Paper

The LINC-NIRVANA testbed Fizeau interferometer

David Andersen, Thomas Bertram, Peter Bizenberger, Sebastian Egner, Thomas Herbst, Roberto Ragazzoni, Christian Straubmeier

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551283

KEYWORDS: Interferometers, Point spread functions, Mirrors, Collimators, Interferometry, Cameras, Detection and tracking algorithms, Telescopes, Sensors, Single mode fibers

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Proceedings Article | 20 October 2004 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

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Proceedings Article | 20 October 2004 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

The fringe and flexure tracking detector of the LBT LINC-NIRVANA beam-combiner instrument

Udo Beckmann, Jan Behrend, Hermann Bohnhardt, Claus Connot, Thomas Driebe, Matthias Heininger, Thomas Herbst, Karl-Heinz Hofmann, Edmund Nussbaum, Dieter Schertl, Walter Solscheid, Christian Straubmeier, Gerd Weigelt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551195

KEYWORDS: Sensors, Electronics, Signal processing, Clocks, Stars, Atmospheric optics, Signal detection, Video, Image processing, Analog electronics

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Proceedings Article | 20 October 2004 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 | 30 September 2004 Paper

The LINC-NIRVANA cryogenic interferometric camera

Peter Bizenberger, Dave Andersen, Harald Baumeister, Udo Beckmann, Emiliano Diolaiti, Tom Herbst, Werner Laun, Lars Mohr, Vianak Naranjo, Christian Straubmeier

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.551400

KEYWORDS: Sensors, Cryogenics, Telescopes, Interferometry, Cameras, Mirrors, Point spread functions, Tolerancing, Collimators, Adaptive optics

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Proceedings Article | 29 September 2004 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

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

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Proceedings Article | 7 March 2003 Paper

Design and results of the fast timing photo-polarimeter OPTIMA

Gottfried Kanbach, Stefan Kellner, Fritz Schrey, Helmut Steinle, Christian Straubmeier, Henk Spruit

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460323

KEYWORDS: Photons, Telescopes, Sensors, X-ray optics, Polarization, X-rays, Photometry, Data acquisition, Target acquisition, Observatories

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Proceedings Article | 21 February 2003 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

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Proceedings Article | 21 February 2003 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

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Proceedings Article | 16 December 2002 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

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