Dr. Wolfgang Brandner Profile

Dr. Wolfgang Brandner

at Max Planck Institut fur Astronomie

SPIE Involvement:

Author

Publications (94)

Proceedings Article | 19 July 2024 Poster

Counting down towards system level AIT for METIS

Remko Stuik, Yau De Huang, Gilles Otten, Ioannis Politopoulos, Dirk Lesman, Adrian Glauser, Chad Salo, Sander Kwast, Dennis Dolkens, Roy van Boekel, Wolfgang Brandner, Ioannis Argyriou, Jeffrey Lynn

Proceedings Volume 13096, 130965A (2024) https://doi.org/10.1117/12.3018309

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Proceedings Article | 18 July 2024 Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: science goals, project overview, and future developments

A. Marconi, M. Abreu, V. Adibekyan, V. Alberti, S. Albrecht, J. Alcaniz, M. Aliverti, C. Allende Prieto, J. Alvarado-Gomez, C. Alves, P. Amado, M. Amate, M. Andersen, S. Antoniucci, E. Artigau, C. Bailet, C. Baker, V. Baldini, A. Balestra, S. Barnes, F. Baron, S. C. Barros, S. Bauer, M. Beaulieu, O. Bellido-Tirado, B. Benneke, T. Bensby, E. Bergin, P. Berio, K. Biazzo, L. Bigot, A. Bik, J. Birkby, N. Blind, O. Boebion, I. Boisse, E. Bolmont, J. Bolton, M. Bonaglia, X. Bonfils, L. Bonhomme, F. Borsa, J.-C. Bouret, A. Brandeker, W. Brandner, C. Broeg, M. Brogi, D. Brousseau, A. Brucalassi, J. Brynnel, L. Buchhave, D. Buscher, L. Cabona, A. Cabral, G. Calderone, R. Calvo-Ortega, F. Cantalloube, B. Canto Martins, L. Carbonaro, Y. Caujolle, G. Chauvin, B. Chazelas, A.-L. Cheffot, Y. Cheng, A. Chiavassa, L. Christensen, R. Cirami, M. Cirasuolo, N. Cook, R. Cooke, I. Coretti, S. Covino, N. Cowan, G. Cresci, S. Cristiani, V. Cunha Parro, G. Cupani, V. D'Odorico, K. Dadi, I. de Castro Leão, A. De Cia, J. De Medeiros, F. Debras, M. Debus, A. Delorme, O. Demangeon, F. Derie, M. Dessauges-Zavadsky, P. Di Marcantonio, S. Di Stefano, F. Dionies, A. Domiciano de Souza, R. Doyon, J. Dunn, S. Egner, D. Ehrenreich, J. Faria, D. Ferruzzi, C. Feruglio, M. Fisher, A. Fontana, B Frank, C. Fuesslein, M. Fumagalli, T. Fusco, J. Fynbo, O. Gabella, W. Gaessler, E. Gallo, X. Gao, L. Genolet, M. Genoni, P. Giacobbe, E. Giro, R. Gonçalves, O. Gonzalez, J. González-Hernández, C. Gouvret, F. Gracia Témich, M. Haehnelt, C. Haniff, A. Hatzes, R. Helled, H. Hoeijmakers, I. Hughes, P. Huke, Y. Ivanisenko, A. Järvinen, S. Järvinen, A. Kaminski, J. Kern, J. Knoche, A. Kordt, H. Korhonen, A. Korn, D. Kouach, G. Kowzan, L. Kreidberg, M. Landoni, A. Lanotte, A. Lavail, B. Lavie, D. Lee, M. Lehmitz, J. Li, W. Li, J. Liske, C. Lovis, S. Lucatello, D. Lunney, M. MacIntosh, N. Madhusudhan, L. Magrini, R. Maiolino, J. Maldonado, L. Malo, A. W. Man, T. Marquart, C. M. Marques, E. Marques, P. Martinez, A. Martins, C. J. A. Martins, J. H. Martins, P. Maslowski, C. Mason, E. Mason, R. McCracken, M. A. Melo e Sousa, P. Mergo, G. Micela, D. Milaković, P. Mollière, M. Monteiro, D. Montgomery, C. Mordasini, J. Morin, A. Mucciarelli, M. Murphy, M. N'Diaye, N. Nardetto, B. Neichel, N. Neri, A. Niedzielski, E. Niemczura, B. Nisini, L. Nortmann, P. Noterdaeme, N. Nunes, L. Oggioni, F. Olchewsky, E. Oliva, H. Önel, L. Origlia, G. Östlin, N. N.-Q. Ouellette, E. Pallé, P. Papaderos, G. Pariani, L. Pasquini, J. Peñate Castro, F. Pepe, C. Peroux, L. Perreault Levasseur, S. Perruchot, P. Petit, O. Pfuhl, L. Pino, J. Piqueras, N. Piskunov, A. Pollo, K. Poppenhaeger, M. Porru, J. Puschnig, A. Quirrenbach, E. Rauscher, R. Rebolo, E. M. Redaelli, S. Reffert, D. Reid, A. Reiners, P. Richter, M. Riva, S. Rivoire, C. Rodríguez-López, I. Roederer, D. Romano, M. Roth, S. Rousseau, J. Rowe, A. Saccardi, S. Salvadori, N. Sanna, N. Santos, P. Santos Diaz, J. Sanz-Forcada, M. Sarajlic, J.-F. Sauvage, D. Savio, A. Scaudo, S. Schäfer, R. Schiavon, T. Schmidt, C. Selmi, R. Simoes, A. Simonnin, S. Sivanandam, M. Sordet, R. Sordo, F. Sortino, D. Sosnowska, S. Sousa, A. Spang, R. Spiga, E. Stempels, J. R. Stevenson, K. Strassmeier, A. Suárez Mascareño, A. Sulich, X. Sun, N. Tanvir, F. Tenegi-Sanginés, S. Thibault, S. Thompson, P. Tisserand, A. Tozzi, M. Turbet, J.-P. Véran, P. Vallée, I. Vanni, R. Varas, A. Vega-Moreno, K. Venn, A. Verma, J. Vernet, M. Viel, G. Wade, C. Waring, M. Weber, J. Weder, B. Wehbé, J. Weingrill, M. Woche, M. Xompero, E. Zackrisson, A. Zanutta, M. Zapatero Osorio, M. Zechmeister, J. Zimara

Proceedings Volume 13096, 1309613 (2024) https://doi.org/10.1117/12.3017966

KEYWORDS: Stars, Spectrographs, Physics, Equipment, Observational astronomy, Exoplanets, Galactic astronomy, Planets, Telescopes, Absorption

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Proceedings Article | 18 July 2024 Poster + Paper

Progress of the Warm Calibration Unit (WCU) subsystem of METIS towards the full subsystem integration: an overview of the post-FDR status

Yigit Dallilar, Vipin Kumar, Michael Wiest, Lucas Labadie, Roy van Boekel, Emilie Bouzerand, Bernhard Brandl, Wolfgang Brandner, Dennis Dolkens, Adrian Glauser, Sander Kwast, Rudolf Le Poole, Dirk Lesman, Mirka Maresca, Gert Raskin, Christian Straubmeier, Remko Stuik, Niels Tromp, Felix Bettonvil

Proceedings Volume 13096, 1309655 (2024) https://doi.org/10.1117/12.3018901

KEYWORDS: Mirrors, Interfaces, Design, Manufacturing, Optical benches, Computer aided design, Tolerancing, Optical alignment, Calibration, Prototyping

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Proceedings Article | 18 July 2024 Poster + Paper

Final optical design of relay optics and alignment optics of the Warm Calibration Unit in METIS/ELT: analysis, performances, and the procurement of the optics

Vipin Kumar, Yigit Dallilar, Michael Wiest, Lucas Labadie, Dennis Dolkens, Eduard Muslimov, Dirk Lesman, Rudolf Le Poole, Remko Stuik, Adrian Glauser, Bernhard Brandl, Roy van Boekel, Wolfgang Brandner, Tarun Sharma, Christian Straubmeier, Felix Bettonvil

Proceedings Volume 13096, 1309656 (2024) https://doi.org/10.1117/12.3018921

KEYWORDS: Mirrors, Optical alignment, Tolerancing, Optical design, Spherical lenses, Optical components, CMOS cameras

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Proceedings Article | 18 July 2024 Poster + Paper

Detection limits of thermal-infrared observations with adaptive optics

J. Sauter, W. Brandner, J. Heidt, B. Brandl, F. Cantalloube

Proceedings Volume 13096, 1309663 (2024) https://doi.org/10.1117/12.3020222

KEYWORDS: Adaptive optics, Signal to noise ratio, Infrared radiation, Deformable mirrors, Telescopes, Infrared backgrounds, Background noise, Contrast sensitivity, Atmospheric corrections

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Proceedings Article | 18 July 2024 Poster + Paper

ANDES, the high resolution spectrograph for the ELT: extending to the K-band

W. Gaessler, H, Korhonen, F, Baron, W, Brandner, P, Di Marcantonio, R, Doyon, M, Ebert, A, Kaminski, L, Kreidberg, W, Laun, M, Lehmitz, A, Marconi, P, Mollière, A, Quirrenbach, R.-R. Rohloff, W. Seifert, J. Stuermer, J. Saint-Antoine, W. Xu, A. Zanutta

Proceedings Volume 13096, 130964E (2024) https://doi.org/10.1117/12.3018397

KEYWORDS: Spectrographs, K band, Equipment, Carbon fibers, Sensors, Design, Adaptive optics, Calibration, Exoplanets, Atmospheres

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Proceedings Article | 29 August 2022 Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: science case, baseline design and path to construction

A. Marconi, M. Abreu, V. Adibekyan, V. Alberti, S. Albrecht, J. Alcaniz, M. Aliverti, C. Allende Prieto, J. D. Alvarado Gómez, P. J. Amado, M. Amate, M. I. Andersen, E. Artigau, C. Baker, V. Baldini, A. Balestra, S. A. Barnes, F. Baron, S. C. C. Barros, S. M. Bauer, M. Beaulieu, O. Bellido-Tirado, B. Benneke, T. Bensby, E. A. Bergin, K. Biazzo, A. Bik, J. L. Birkby, N. Blind, I. Boisse, E. Bolmont, M. Bonaglia, X. Bonfils, F. Borsa, A. Brandeker, W. Brandner, C. H. Broeg, M. Brogi, D. Brousseau, A. Brucalassi, J. Brynnel, L. A. Buchhave, D. F. Buscher, A. Cabral, G. Calderone, R. Calvo-Ortega, B. L. Canto Martins, F. Cantalloube, L. Carbonaro, G. Chauvin, B. Chazelas, A.-L. Cheffot, Y. S. Cheng, A. Chiavassa, L. Christensen, R. Cirami, N. J. Cook, R. J. Cooke, I. Coretti, S. Covino, N. Cowan, G. Cresci, S. Cristiani, V. Cunha Parro, G. Cupani, V. D'Odorico, I. de Castro Leão, A. De Cia, J. R. De Medeiros, F. Debras, M. Debus, O. Demangeon, M. Dessauges-Zavadsky, P. Di Marcantonio, F. Dionies, R. Doyon, J. Dunn, D. Ehrenreich, J. P. Faria, C. Feruglio, M. Fisher, A. Fontana, M. Fumagalli, T. Fusco, J. Fynbo, O. Gabella, W. Gaessler, E. Gallo, X. Gao, L. Genolet, M. Genoni, P. Giacobbe, E. Giro, R. S. Gonçalves, O. Gonzalez, J. I. González Hernández, F. Gracia Témich, M. G. Haehnelt, C. Haniff, A. Hatzes, R. Helled, H.J. Hoeijmakers, P. Huke, S. Järvinen, A. Järvinen, A. Kaminski, A. Korn, D. Kouach, G. Kowzan, L. Kreidberg, M. Landoni, A. Lanotte, A. Lavail, J. Li, J. Liske, C. Lovis, S. Lucatello, D. Lunney, M. MacIntosh, N. Madhusudhan, L. Magrini, R. Maiolino, L. Malo, A. Man, T. Marquart, E. L. Marques, A. M. Martins, C. J. A. P. Martins, P. Maslowski, C. Mason, E. Mason, R. A. McCracken, P. Mergo, G. Micela, T. Mitchell, P. Mollière, M. Monteiro, D. Montgomery, C. Mordasini, J. Morin, A. Mucciarelli, M. T. Murphy, M. N'Diaye, B. Neichel, A. T. Niedzielski, E. Niemczura, L. Nortmann, P. Noterdaeme, N. Nunes, L. Oggioni, E. Oliva, H. Önel, L. Origlia, G. Östlin, E. Palle, P. Papaderos, G. Pariani, J. Peñate Castro, F. Pepe, L. Perreault Levasseur, P. Petit, L. Pino, J. Piqueras, A. Pollo, K. Poppenhaeger, A. Quirrenbach, E. Rauscher, R. Rebolo, E. M. A. Redaelli, S. Reffert, D. T. Reid, A. Reiners, P. Richter, M. Riva, S. Rivoire, C. Rodríguez-López, I. U. Roederer, D. Romano, S. Rousseau, J. Rowe, S. Salvadori, N. Santos, P. Santos Diaz, J. Sanz-Forcada, M. Sarajlic, J.-F. Sauvage, S. Schäfer, R. P. Schiavon, T. M. Schmidt, C. Selmi, S. Sivanandam, M. Sordet, R. Sordo, F. Sortino, D. Sosnowska, S. G. Sousa, E. Stempels, K. G. Strassmeier, A. Suárez Mascareño, A. Sulich, X. Sun, N.R. Tanvir, F. Tenegi-Sanginés, S. Thibault, S. J. Thompson, A. Tozzi, M. Turbet, P. Vallée, R. Varas, K. Venn, J.-P. Véran, A. Verma, M. Viel, G. Wade, C. Waring, M. Weber, J. Weder, B. Wehbe, J. Weingrill, M. Woche, M. Xompero, E. Zackrisson, A. Zanutta, M. R. Zapatero Osorio, M. Zechmeister, J. Zimara

Proceedings Volume 12184, 1218424 (2022) https://doi.org/10.1117/12.2628689

KEYWORDS: Physics, Spectrographs, Stars, Astronomy, Galactic astronomy, Astrophysics, Exoplanets, Planets, Spectral resolution, Absorption

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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 | 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

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 Presentation + Paper

Star and planet formation with the new generation VLTI and CHARA beam combiners

Lucia Klarmann, Myriam Benisty, Wolfgang Brandner, Roy van Boekel, Thomas Henning

Proceedings Volume 11446, 114460P (2020) https://doi.org/10.1117/12.2562282

KEYWORDS: Stars, Planets, Planetary systems, Spectral resolution, Sun, Astronomical telescopes, Telescopes, Image restoration, Interferometry, Astronomy

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Proceedings Article | 13 December 2020 Poster + Presentation

Infrared wavefront sensing for adaptive optics assisted galactic center observations with GRAVITY

Stefan Hippler, Wolfgang Brandner, Silvia Scheithauer, Martin Kulas, Johana Panduro, Peter Bizenberger, Henri Bonnet, Casey Deen, Françoise Delplancke-Ströbele, Frank Eisenhauer, Gert Finger, Zoltan Hubert, Johann Kolb, Eric Müller, Laurent Pallanca, Julien Woillez, Gérard Zins

Proceedings Volume 11448, 114484K (2020) https://doi.org/10.1117/12.2560222

KEYWORDS: Adaptive optics, Wavefront sensors, Infrared radiation, Interferometers, Infrared sensors, Infrared telescopes, Telescopes, Sensors, Large telescopes, K band

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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 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 | 13 December 2020 Presentation + Paper

Testing P-REx on VLTI data

Saavidra Perera, Jörg-Uwe Pott, Jullien Woillez, Martin Kulas, Wolfgang Brandner, Sylvestre Lacour, Felix Widmann, Steve Ertel, Amali Vaz

Proceedings Volume 11446, 114460J (2020) https://doi.org/10.1117/12.2560105

KEYWORDS: Interferometers, Adaptive optics, Telescopes, Atmospheric optics, Interferometry, Atmospheric turbulence, Sensors, Optical aberrations, Wind measurement, Velocity measurements

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Proceedings Article | 10 July 2018 Paper

Single conjugate adaptive optics for METIS

Thomas Bertram, Olivier Absil, Peter Bizenberger, Wolfgang Brandner, Florian Briegel, Faustine Cantalloube, Brunella Carlomagno, María Concepción Cárdenas Vázquez, Markus Feldt, Adrian Glauser, Thomas Henning, Stefan Hippler, Armin Huber, Norma Hurtado, Matthew Kenworthy, Martin Kulas, Lars Mohr, Vianak Naranjo, Philip Neureuther, Andreas Obereder, Ralf-Rainer Rohloff, Silvia Scheithauer, Iuliia Shatokhina, Remko Stuik, Roy van Boekel

Proceedings Volume 10703, 1070314 (2018) https://doi.org/10.1117/12.2313325

KEYWORDS: Adaptive optics, Control systems, Wavefronts, Wavefront sensors, Mirrors, Real-time computing, Actuators, Modulators

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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

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 | 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 | 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 | 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 | 27 July 2016 Paper

CIAO: wavefront sensors for GRAVITY

Silvia Scheithauer, Wolfgang Brandner, Casey Deen, Tobias Adler, Henri Bonnet, Pierre Bourget, Fanny Chemla, Yann Clenet, Francoise Delplancke, Monica Ebert, Frank Eisenhauer, Michael Esselborn, Gert Finger, Eric Gendron, Adrian Glauser, Frederic Gonte, Thomas Henning, Stefan Hippler, Armin Huber, Zoltan Hubert, Gerd Jakob, Lieselotte Jochum, Laurent Jocou, Sarah Kendrew, Ralf Klein, Johann Kolb, Martin Kulas, Werner Laun, Rainer Lenzen, Marcus Mellein, Eric Müller, Javier Moreno-Ventas, Udo Neumann, Sylvain Oberti, Jürgen Ott, Laurent Pallanca, Johana Panduro, Jose Ramos, Miguel Riquelme, Ralf-Rainer Rohloff, Gérard Rousset, Nicolas Schuhler, Marcos Suarez, Gerard Zins

Proceedings Volume 9909, 99092L (2016) https://doi.org/10.1117/12.2232997

KEYWORDS: Wavefront sensors, Telescopes, Adaptive optics, Observatories, Infrared telescopes, Stars, Infrared sensors, Wavefront sensors, Infrared telescopes, Infrared radiation, Sensors, Mirrors

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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/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 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 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 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

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 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

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

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 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

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 | 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

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 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 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 | 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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Proceedings Article | 21 July 2014 Paper

High contrast imaging at the LBT: the LEECH exoplanet imaging survey

Andrew Skemer, Philip Hinz, Simone Esposito, Michael Skrutskie, Denis Defrère, Vanessa Bailey, Jarron Leisenring, Daniel Apai, Beth Biller, Mickaël Bonnefoy, Wolfgang Brandner, Esther Buenzli, Laird Close, Justin Crepp, Robert De Rosa, Silvano Desidera, Josh Eisner, Jonathan Fortney, Thomas Henning, Karl-Heinz Hofmann, Taisiya Kopytova, Anne-Lise Maire, Jared Males, Rafael Millan-Gabet, Katie Morzinski, Apurva Oza, Jenny Patience, Abhijith Rajan, George Rieke, Dieter Schertl, Joshua Schlieder, Kate Su, Amali Vaz, Kimberly Ward-Duong, Gerd Weigelt, Charles Woodward, Neil Zimmerman

Proceedings Volume 9148, 91480L (2014) https://doi.org/10.1117/12.2057277

KEYWORDS: Planets, Stars, Exoplanets, Telescopes, Adaptive optics, Imaging systems, Mirrors, Cameras, Wavefront sensors, Interferometers

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Proceedings Article | 15 October 2012 Paper

Surface figure measurement of flat mirrors based on the subaperture stitching interferometry

Pengqian Yang, Stefan Hippler, Zhaojun Yan, Rainer Lenzen, Wolfgang Brandner, Casey Deen, Thomas Henning, Armin Huber, Sarah Kendrew, Jianqiang Zhu

Proceedings Volume 8417, 841723 (2012) https://doi.org/10.1117/12.974568

KEYWORDS: Interferometers, Mirrors, Optical testing, Stitching interferometry, Wavefronts, Interferometry, Error analysis, Calibration, Astronomy, Astronomical imaging

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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 | 24 September 2012 Paper

METIS: the thermal infrared instrument for the E-ELT

Bernhard Brandl, Rainer Lenzen, Eric Pantin, Alistair Glasse, Joris Blommaert, Michael Meyer, Manuel Guedel, Lars Venema, Frank Molster, Remko Stuik, Eva Schmalzl, Jeff Meisner, Emeric Le Floc'h, Wolfgang Brandner, Stefan Hippler, Ignas Snellen, Klaus Pontoppidan

Proceedings Volume 8446, 84461M (2012) https://doi.org/10.1117/12.926057

KEYWORDS: Adaptive optics, Sensors, Planets, Exoplanets, Imaging systems, Galactic astronomy, Telescopes, Mirrors, Stars, Infrared radiation

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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

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

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 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: 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

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

Optimizing the transmission of the GRAVITY/VLTI near-infrared wavefront sensor

Pengqian Yang, Stefan Hippler, Casey Deen, Armin Böhm, Wolfgang Brandner, Thomas Henning, Armin Huber, Sarah Kendrew, Rainer Lenzen, Ralf-Rainer Rohloff, Constanza Araujo-Hauck, Oliver Pfuhl, Yann Clénet, Jianqiang Zhu

Proceedings Volume 8445, 844531 (2012) https://doi.org/10.1117/12.925920

KEYWORDS: Wavefront sensors, Wavefronts, Adaptive optics, Interferometry, Telescopes, Metrology, Interferometers, Optical filters, Optical testing, Laser metrology

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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 | 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 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 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 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 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 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

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

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 | 21 July 2010 Paper

METIS: system engineering and optical design of the mid-infrared E-ELT instrument

Rainer Lenzen, Bernhard Brandl, Eric Pantin, Alistair Glasse, Joris Blommaert, Lars Venema, Rik ter Horst, Ad Oudenhuysen, Frank Molster, Ralf Siebenmorgen, Hermann Böhnhardt, Ewine van Dishoeck, Paul van der Werf, Wolfgang Brandner, Thomas Henning, Stefan Hippler, Pierre-Olivier Lagage, Toby Moore, Maarten Baes, Christoffel Waelkens, Chris Wright, Hans Ulrich Käufl, Sarah Kendrew, Remko Stuik, Laurent Jolissaint

Proceedings Volume 7735, 77357O (2010) https://doi.org/10.1117/12.856242

KEYWORDS: Mirrors, Spectroscopy, Imaging spectroscopy, Diffraction, Spectral resolution, Imaging systems, Calibration, Spectrographs, Sensors, Optical design

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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 | 15 July 2010 Paper

Instrument concept and science case for the mid-IR E-ELT imager and spectrograph METIS

Bernhard Brandl, Rainer Lenzen, Eric Pantin, Alistair Glasse, Joris Blommaert, Lars Venema, Frank Molster, Ralf Siebenmorgen, Sarah Kendrew, Maarten Baes, Hermann Böhnhardt, Wolfgang Brandner, Ewine van Dishoeck, Thomas Henning, Hans Ullrich Käufl, Pierre-Olivier Lagage, Toby J. Moore, Christoffel Waelkens, Paul van der Werf

Proceedings Volume 7735, 77352G (2010) https://doi.org/10.1117/12.857346

KEYWORDS: Imaging systems, Adaptive optics, Calibration, Telescopes, Sensors, Iterated function systems, Mid-IR, Spectrographs, Spectral resolution, Stars

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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

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

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 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 | 15 July 2008 Paper

Near-infrared wavefront sensing for the VLT interferometer

Stefan Hippler, Wolfgang Brandner, Yann Clénet, Felix Hormuth, Eric Gendron, Thomas Henning, Ralf Klein, Rainer Lenzen, Daniel Meschke, Vianak Naranjo, Udo Neumann, José Ricardo Ramos, Ralf-Rainer Rohloff, Frank Eisenhauer

Proceedings Volume 7015, 701555 (2008) https://doi.org/10.1117/12.789053

KEYWORDS: Wavefront sensors, Sensors, Adaptive optics, Wavefronts, Control systems, Stars, Telescopes, Deformable mirrors, Electronics, Interferometers

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Proceedings Article | 11 July 2008 Paper

AstraLux: the Calar Alto lucky imaging camera

Felix Hormuth, Stefan Hippler, Wolfgang Brandner, Karl Wagner, Thomas Henning

Proceedings Volume 7014, 701448 (2008) https://doi.org/10.1117/12.787384

KEYWORDS: Point spread functions, Telescopes, Stars, Cameras, Diffraction, Optical filters, Image filtering, Adaptive optics, Image quality, Sensors

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Proceedings Article | 9 July 2008 Paper

METIS: the mid-infrared E-ELT imager and spectrograph

Bernhard Brandl, Rainer Lenzen, Eric Pantin, Alistair Glasse, Joris Blommaert, Lars Venema, Frank Molster, Ralf Siebenmorgen, Hermann Boehnhardt, Ewine van Dishoeck, Paul van der Werf, Thomas Henning, Wolfgang Brandner, Pierre-Olivier Lagage, Toby Moore, Maarten Baes, Christoffel Waelkens, Chris Wright, Hans Ulrich Käufl, Sarah Kendrew, Remko Stuik, Laurent Jolissaint

Proceedings Volume 7014, 70141N (2008) https://doi.org/10.1117/12.789241

KEYWORDS: Mid-IR, Planets, Stars, Imaging spectroscopy, Comets, Adaptive optics, Spectroscopy, Silicates, Spectrographs, Exoplanets

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Proceedings Article | 4 July 2006 Paper

Contrast limits with the Simultaneous Differential Extrasolar Planet Imager (SDI) at the VLT and MMT

Beth Biller, Laird Close, Elena Masciadri, Rainer Lenzen, Wolfgang Brandner, Donald McCarthy, Thomas Henning, Eric Nielsen, Markus Hartung, Stephan Kellner, Kerstin Geissler, Markus Kasper

Proceedings Volume 6272, 62722D (2006) https://doi.org/10.1117/12.671771

KEYWORDS: Stars, Planets, Adaptive optics, Image filtering, Exoplanets, Methane, Optical filters, Speckle, Absorption, Point spread functions

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Proceedings Article | 29 June 2006 Paper

MIDIR/T-OWL: the thermal/mid-IR instrument for the E-ELT

Bernhard Brandl, Rainer Lenzen, Lars Venema, Hans-Ulrich Käufl, Gert Finger, Alistair Glasse, Wolfgang Brandner, Remko Stuik

Proceedings Volume 6269, 626920 (2006) https://doi.org/10.1117/12.670806

KEYWORDS: Telescopes, Adaptive optics, Mid-IR, Imaging spectroscopy, Spatial resolution, Stars, Spectral resolution, Spectroscopy, Molecules, Spectrographs

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Proceedings Article | 28 June 2006 Paper

Observational capabilities and technical solutions of a thermal and MIR instrument at E-ELT

Rainer Lenzen, Bernhard Brandl, Wolfgang Brandner, Gert Finger, Alistair Glasse, Hans-Ulrich Käufl, Lars Venema

Proceedings Volume 6269, 626952 (2006) https://doi.org/10.1117/12.671193

KEYWORDS: Telescopes, Spectroscopy, Sensors, Adaptive optics, Diffraction, Imaging systems, Cameras, Space telescopes, Switches, Collimators

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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 | 27 June 2006 Paper

The MPIA multipurpose laboratory atmospheric turbulence simulator MAPS

Stefan Hippler, Felix Hormuth, Wolfgang Brandner, David Butler, Thomas Henning, Sebastian Egner

Proceedings Volume 6272, 627255 (2006) https://doi.org/10.1117/12.671362

KEYWORDS: Adaptive optics, Point spread functions, Glasses, Wavefronts, Atmospheric optics, Manufacturing, Telescopes, Microlens array, Atmospheric turbulence, Turbulence

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Proceedings Article | 25 October 2004 Paper

Suppressing speckle noise for simultaneous differential extrasolar planet imaging (SDI) at the VLT and MMT

Beth Biller, Laird Close, Rainer Lenzen, Wolfgang Brandner, Donald McCarthy, Eric Nielsen, Markus Hartung

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.552164

KEYWORDS: Stars, Planets, Image filtering, Adaptive optics, Exoplanets, Speckle, Optical filters, Methane, Absorption, Signal attenuation

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Proceedings Article | 25 October 2004 Paper

Simulations versus observations obtained with simultaneous differential imaging

Alessandro Berton, Stefan Kellner, Markus Feldt, Elena Masciadri, Rainer Lenzen, Wolfgang Brandner, Markus Hartung, Raffaele Gratton

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550328

KEYWORDS: Point spread functions, Stars, Device simulation, Adaptive optics, Planets, Exoplanets, Telescopes, Wavefronts, Speckle, Sensors

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Proceedings Article | 30 September 2004 Paper

A novel simultaneous differential imager for the direct imaging of giant planets

Rainer Lenzen, Laird Close, Wolfgang Brandner, Beth Biller, Markus Hartung

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.549406

KEYWORDS: Stars, Planets, Imaging systems, Adaptive optics, Absorption, Exoplanets, Methane, Speckle, Diffraction, Image filtering

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Proceedings Article | 30 September 2004 Paper

The science case of the CHEOPS planet finder for VLT

Raffaele Gratton, Markus Feldt, Hans Martin Schmid, Wolfgang Brandner, Stefan Hippler, R. Neuhauser, Andreas Quirrenbach, Silvano Desidera, Massimo Turatto, Daphne Stam

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.551417

KEYWORDS: Planets, Exoplanets, Stars, Astronomy, Speckle, Polarimetry, Modulation, Field spectroscopy, Adaptive optics

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Proceedings Article | 30 September 2004 Paper

CHEOPS/ZIMPOL: a VLT instrument study for the polarimetric search of scattered light from extrasolar planets

Daniel Gisler, Hans Martin Schmid, Christian Thalmann, Hans Peter Povel, Jan Stenflo, Franco Joos, Markus Feldt, Rainer Lenzen, Jaap Tinbergen, Raffaele Gratton, Remko Stuik, Daphne Stam, Wolfgang Brandner, Stefan Hippler, Massimo Turatto, R. Neuhauser, Carsten Dominik, Artie Hatzes, Thomas Henning, Jorge Lima, Andreas Quirrenbach, L.B.F.M. Waters, Gunther Wuchterl, Hans Zinnecker

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.550366

KEYWORDS: Polarization, Polarimetry, Modulators, Exoplanets, Signal detection, Photons, Adaptive optics, Modulation, Charge-coupled devices, Imaging systems

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Proceedings Article | 7 March 2003 Paper

First diffraction-limited images at VLT with NAOS and CONICA

Anne-Marie Lagrange, G. Chauvin, Thierry Fusco, Eric Gendron, Daniel Rouan, Markus Hartung, Francois Lacombe, David Mouillet, Gerard Rousset, Pierre Drossart, Rainer Lenzen, Claire Moutou, Wolfgang Brandner, Norbert Hubin, Yann Clenet, Andrea Stolte, Rainer Schoedel, Gerard Zins, Jason Spyromilio

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461892

KEYWORDS: Adaptive optics, Infrared imaging, Coronagraphy, Sensors, Saturn, Diffraction, Stars, Cameras, Telescopes, Strontium

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Proceedings Article | 7 March 2003 Paper

CONICA design, performance and final laboratory tests

Markus Hartung, Rainer Lenzen, Reiner Hofmann, Armin Böhm, Wolfgang Brandner, Gert Finger, Thierry Fusco, Francois Lacombe, Werner Laun, Philippe Granier, Clemens Storz, Karl Wagner

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460035

KEYWORDS: Adaptive optics, Sensors, Calibration, Imaging spectroscopy, Electrons, Data conversion, Cameras, Spectroscopes, Astronomy, Telescopes

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Proceedings Article | 7 March 2003 Paper

NAOS-CONICA first on-sky results in a variety of observing modes

Rainer Lenzen, Markus Hartung, Wolfgang Brandner, Gert Finger, Norbert Hubin, Francois Lacombe, Anne-Marie Lagrange, Matthew Lehnert, Alan Moorwood, David Mouillet

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460044

KEYWORDS: Cameras, Diffraction, Imaging spectroscopy, Spectroscopy, Calibration, Polarization, K band, Near infrared, Polarimetry, Spectral resolution

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Proceedings Article | 14 February 2003 Paper

Polarimetry with adaptive optics at ESO Very Large Telescope (Yepun)

Nancy Ageorges, Rainer Lenzen, Markus Hartung, Wolfgang Brandner, Eric Gendron, Alan Moorwood, Anne-Marie Lagrange

Proceedings Volume 4843, (2003) https://doi.org/10.1117/12.459344

KEYWORDS: Polarization, Polarimetry, Prisms, Adaptive optics, Telescopes, Calibration, Infrared radiation, Polarizers, Infrared telescopes, Infrared cameras

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Proceedings Article | 13 February 2003 Paper

Evolution of circumstellar disks: lessons from the VLT and ISO

Wolfgang Brandner, Andrea Moneti, Hans Zinnecker

Proceedings Volume 4834, (2003) https://doi.org/10.1117/12.457703

KEYWORDS: Stars, Infrared radiation, Solar system, Planets, Adaptive optics, Planetary systems, Near infrared, Spectrographs, Absorption, Light scattering

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