Dr. Stefan Hippler Profile

Dr. Stefan Hippler

Physicist and Astronomer at Max-Planck-Institut für Astronomie

SPIE Involvement:

Author

Publications (66)

Proceedings Article | 16 December 2020 Presentation + Paper

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 Poster + Presentation + Paper

Poster + Presentation + Paper

The adaptive optics simulation analysis tool(kit) (AOSAT)

M. Feldt, S. Hippler, F. Cantalloube, T. Bertram, A. Obereder, H. Steuer, O. Absil, M. Le Louarn

Proceedings Volume 11448, 114483S (2020) https://doi.org/10.1117/12.2561404

KEYWORDS: Adaptive optics, Optical simulations, Computer simulations, Device simulation, Visualization

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Proceedings Article | 13 December 2020 Poster + Presentation

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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SPIE Journal Paper | 22 October 2020 Open Access

Open Access

METIS high-contrast imaging: design and expected performance (Erratum)

Brunella Carlomagno, Christian Delacroix, Olivier Absil, Faustine Cantalloube, Gilles Orban de Xivry, Prashant Pathak, Tibor Agocs, Thomas Bertram, Bernhard Brandl, Leonard Burtscher, David Doelman, Markus Feldt, Adrian Glauser, Stefan Hippler, Matthew Kenworthy, Emiel Por, Frans Snik, Remko Stuik, Roy van Boekel

JATIS, Vol. 6, Issue 04, 049801, (October 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.4.049801

KEYWORDS: Coronagraphy, Observatories, Stars, Prototyping, Particle physics, Infrared radiation, Infrared astronomy, Astrophysics

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SPIE Journal Paper | 24 September 2020 Open Access

Open Access

METIS high-contrast imaging: design and expected performance

Brunella Carlomagno, Christian Delacroix, Olivier Absil, Faustine Cantalloube, Gilles Orban de Xivry, Prashant Pathak, Tibor Agocs, Thomas Bertram, Bernhard Brandl, Leonard Burtscher, David Doelman, Markus Feldt, Adrian Glauser, Stefan Hippler, Matthew Kenworthy, Emiel Por, Frans Snik, Remko Stuik, Roy van Boekel

JATIS, Vol. 6, Issue 03, 035005, (September 2020) https://doi.org/10.1117/12.10.1117/1.JATIS.6.3.035005

KEYWORDS: Human-computer interaction, Coronagraphy, Point spread functions, Adaptive optics, Stars, L band, Image segmentation, Telescopes, Mirrors, Imaging systems

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Proceedings Article | 10 July 2018 Paper

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 | 27 July 2016 Paper

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

Paper

End-to-end simulations of the E-ELT/METIS coronagraphs

Brunella Carlomagno, Olivier Absil, Matthew Kenworthy, Garreth Ruane, Christoph Keller, Gilles Otten, Markus Feldt, Stefan Hippler, Elsa Huby, Dimitri Mawet, Christian Delacroix, Jean Surdej, Serge Habraken, Pontus Forsberg, Mikael Karlsson, Ernesto Vargas Catalan, Bernhard Brandl

Proceedings Volume 9909, 990973 (2016) https://doi.org/10.1117/12.2233444

KEYWORDS: Device simulation, Adaptive optics, Planets, Stars, Device simulation, Mid-IR, Coronagraphy, Point spread functions, Spiral phase plates, Optical simulations, Atmospheric propagation

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Proceedings Article | 27 July 2016 Paper

Paper

Sensing wavefronts on resolved sources with pyramids on ELTs

Markus Feldt, Stefan Hippler, Andreas Obereder, Remko Stuik, Thomas Bertram

Proceedings Volume 9909, 990961 (2016) https://doi.org/10.1117/12.2232601

KEYWORDS: Adaptive optics, Sensors, Device simulation, Wavefronts, Stars, Telescopes, Computer simulations, Wavefront sensors, Device simulation, Modulation, Ions

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Proceedings Article | 26 July 2016 Paper

Paper

Designing the METIS SCAO and LTAO systems

Remko Stuik, Markus Feldt, Stefan Hippler, Thomas Bertram, Silvia Scheithauer, Andreas Obereder, Daniela Saxenhuber, Bernhard Brandl, Matt Kenworthy, Rieks Jager, Lars Venema

Proceedings Volume 9909, 99090B (2016) https://doi.org/10.1117/12.2233229

KEYWORDS: Imaging spectroscopy, Wavefront sensors, Adaptive optics, Sensors, Stars, Telescopes, Tomography, Infrared radiation, Metrology, Solids

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METIS, the Mid-nfrared E-ELT Imager and Spectrometer, will be providing high-sensitivity imaging and high-resolution spectroscopy in the mid-infrared (3-19 micrometer) to the E-ELT. In order to achieve the exceptional performance required by its driving science cases, exoplanets and proto-planetary disks, METIS will be featuring two Adaptive Optics (AO) systems — a first-light Single Conjugate Adaptive Optics (SCAO) system, complemented by a Laser Tomographic Adaptive Optics (LTAO) system, most likely, a few years after first light. METIS, being one of the three first light science instruments on the European Extremely Large Telescope (E-ELT), will be one of the first instruments using the integrated deformable mirror of the E-ELT for its Adaptive Optics (AO) correction.

The internal SCAO system designed to maximize the performance for bright targets and has its wavefront sensors (WFSs) build inside the METIS cryostat to minimize the number of warm surfaces towards the science detectors. Although the internal dichroic will reflect all light short wards of 3 micrometers towards the WFS, only the IR light will most likely be used, mainly due to the expected improved performance at longer wavelengths for the WFS. A trade-off has been made between both visible versus infrared wave front sensing as well as Pyramid versus Shack-Hartmann, under various observing conditions and target geometries, taking into account performance, target availability, reliability and technology readiness level. The base line for the SCAO system is to minimize system complexity, thereby ensuring system availability and reliability even under first-light conditions.

Since the SCAO system will require a bright guide star near the science target, it can only be used for a limited number of targets. The LTAO system, consisting of up to 6 LGS and up to 3 low-order NGS WFS and located outside the cryostat, is designed to increase the sky coverage on arbitrary targets to >80%. Investigations are ongoing if the internal SCAO system can be used as either a Low-Order WFS or metrology system.

Proceedings Article | 7 August 2014 Paper

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 | 15 October 2012 Paper

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

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

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 | 13 September 2012 Paper

Paper

Designing the METIS adaptive optics system

R. Stuik, S. Hippler, A. Stolte, B. Brandl, F. Molster, L. Venema, R. Lenzen, E. Pantin, J. Blommaert, A. Glasse, M. Meyer

Proceedings Volume 8447, 84473L (2012) https://doi.org/10.1117/12.926137

KEYWORDS: Adaptive optics, Mid-IR, Telescopes, Stars, Imaging systems, Imaging spectroscopy, Diffraction, Atmospheric optics, Actuators, Spectroscopy

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Proceedings Article | 12 September 2012 Paper

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 | 27 May 2011 Paper

Paper

Transmission sphere calibration and its current limits

Pengqian Yang, Jia Xu, Jianqiang Zhu, Stefan Hippler

Proceedings Volume 8082, 80822L (2011) https://doi.org/10.1117/12.889458

KEYWORDS: Calibration, Interferometers, Optical spheres, Optical testing, Wavefronts, Interferometry, Error analysis, Geometrical optics, Spherical lenses, Fizeau interferometers

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Proceedings Article | 29 July 2010 Paper

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 | 28 July 2010 Paper

Paper

The METIS AO system: bringing extreme adaptive optics to the mid-IR

R. Stuik, L. Jolissaint, S. Kendrew, S. Hippler, B. Brandl, L. Venema, R. Lenzen, E. Pantin, J. Blommaert, A. Glasse

Proceedings Volume 7736, 77363G (2010) https://doi.org/10.1117/12.856948

KEYWORDS: Adaptive optics, Mid-IR, Telescopes, Wavefront sensors, Stars, Turbulence, Diffraction, Water, Imaging systems, L band

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Proceedings Article | 22 July 2010 Open Access

Open Access

Paper

GRAVITY: a four telescope beam combiner instrument for the VLTI

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

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

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

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Proceedings Article | 21 July 2010 Paper

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 | 28 July 2008 Open Access

Open Access

Paper

GRAVITY: getting to the event horizon of Sgr A*

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

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

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

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Proceedings Article | 15 July 2008 Paper

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 | 15 July 2008 Paper

Paper

Atmospheric refractivity effects on mid-infrared ELT adaptive optics

Sarah Kendrew, Laurent Jolissaint, Richard Mathar, Remko Stuik, Stefan Hippler, Bernhard Brandl

Proceedings Volume 7015, 70155T (2008) https://doi.org/10.1117/12.789087

KEYWORDS: Adaptive optics, Mid-IR, Water, Atmospheric optics, Telescopes, Wavefront sensors, Turbulence, Atmospheric sciences, Infrared radiation, Near infrared

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Proceedings Article | 11 July 2008 Paper

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 | 4 July 2006 Paper

Paper

First light of the ESO laser guide star facility

D. Bonaccini Calia, E. Allaert, J. Alvarez, C. Araujo Hauck, G. Avila, E. Bendek, B. Buzzoni, M. Comin, M. Cullum, R. Davies, M. Dimmler, I. Guidolin, W. Hackenberg, S. Hippler, S. Kellner, A. van Kesteren, F. Koch, U. Neumann, T. Ott, D. Popovic, F. Pedichini, M. Quattri, J. Quentin, S. Rabien, A. Silber, M. Tapia

Proceedings Volume 6272, 627207 (2006) https://doi.org/10.1117/12.674484

KEYWORDS: Telescopes, Sodium, Laser guide stars, Adaptive optics, Fiber lasers, LIDAR, Scattering, Continuous wave operation, Laser scattering, Observatories

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Proceedings Article | 28 June 2006 Open Access

Open Access

Paper

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

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

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

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

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Proceedings Article | 28 June 2006 Paper

Paper

PYRAMIR: construction and implementation of the world's first infrared pyramid sensor

D. Peter, H. Baumeister, P. Bizenberger, M. Feldt, Th. Henning, S. Hippler, S. Ligori, U. Mall, U. Neumann, N. Salm, C. Storz, K. Wagner

Proceedings Volume 6272, 627226 (2006) https://doi.org/10.1117/12.671280

KEYWORDS: Calibration, Sensors, Wavefronts, Infrared sensors, Wavefront sensors, Infrared radiation, Infrared telescopes, Stars, Telescopes, Adaptive optics

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Proceedings Article | 27 June 2006 Paper

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 | 27 June 2006 Paper

Paper

PYRAMIR: first on-sky results from an infrared pyramid wavefront sensor

M. Feldt, D. Peter, S. Hippler, Th. Henning, J. Aceituno, M. Goto

Proceedings Volume 6272, 627218 (2006) https://doi.org/10.1117/12.671305

KEYWORDS: Sensors, Calibration, Wavefront sensors, Adaptive optics, Device simulation, Telescopes, Stars, Infrared sensors, Infrared radiation, Cameras

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Proceedings Article | 25 October 2004 Paper

Paper

Characterization of deformable mirrors for high-order adaptive optics systems

Remko Stuik, Stefan Hippler, Markus Feldt, Jesus Aceituno, Sebastian Egner

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550438

KEYWORDS: Actuators, Adaptive optics, Mirrors, Calibration, Deformable mirrors, Temperature metrology, Planets, Visible radiation, Control systems, Atmospheric optics

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Proceedings Article | 25 October 2004 Paper

Paper

Optimizing wavefront sensing for extreme AO

Rainer Koehler, Stefan Hippler, Markus Feldt, Raffaele Gratton, Daniel Gisler, Remko Stuik, Jorge Lima

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550314

KEYWORDS: Wavefronts, Adaptive optics, Wavefront sensors, Atmospheric modeling, Device simulation, Stars, Computer simulations, Planets, Telescopes, Deformable mirrors

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Proceedings Article | 25 October 2004 Paper

Paper

Wavefront sensing through spatial filters: the case for coronographic, high-contrast AO systems

Markus Feldt, Joana Costa, Micaela Stumpf, Hans-Martin Schmid, Alessandro Berton, Stefan Hippler, Remko Stuik, Jorge Lima

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550883

KEYWORDS: Adaptive optics, Sensors, Wavefronts, Spatial filters, Wavefront sensors, Point spread functions, Calibration, Condition numbers, Actuators, Computer simulations

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Proceedings Article | 25 October 2004 Paper

Paper

Modal selection using genetic optimization

Douglas Looze, Stefan Hippler, Markus Feldt

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550080

KEYWORDS: Condition numbers, Adaptive optics, Genetic algorithms, Wavefronts, Binary data, Matrices, Calibration, Genetics, Optimization (mathematics), Reconstruction algorithms

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Proceedings Article | 25 October 2004 Paper

Paper

Status report of PYRAMIR: a near-infrared pyramid wavefront sensor for ALFA

Joana Costa, Markus Feldt, Karl Wagner, Peter Bizenberger, Stefan Hippler, Harald Baumeister, Micaela Stumpf, Roberto Ragazzoni, Simone Esposito, Thomas Henning

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551713

KEYWORDS: Wavefront sensors, Sensors, Adaptive optics, Optical design, Telescopes, Deformable mirrors, Infrared radiation, Mirrors, Calibration, Modulation

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Proceedings Article | 25 October 2004 Paper

Paper

Scintillation effects on a high-contrast imaging instrument for direct detection of exoplanets

Elena Masciadri, Markus Feldt, Stefan Hippler

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550402

KEYWORDS: Scintillation, Wavefronts, Point spread functions, Actuators, Atmospheric propagation, Wave propagation, Speckle, Atmospheric modeling, Turbulence, Imaging systems

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Proceedings Article | 25 October 2004 Paper

Paper

Off-the-shelf real-time computers for next-generation adaptive optics

Stefan Hippler, Douglas Looze, Wolfgang Gaessler

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550036

KEYWORDS: Adaptive optics, Computing systems, Real-time computing, Operating systems, Digital signal processing, Actuators, Wavefronts, Switches, Data acquisition, Wavefront sensors

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Proceedings Article | 25 October 2004 Paper

Paper

Performance of PYRAMIR detector system

Sebastiano Ligori, Bernhard Grimm, Stefan Hippler

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.550431

KEYWORDS: Sensors, Electronics, Wavefront sensors, Clocks, Infrared sensors, Signal detection, Adaptive optics, Infrared detectors, Near infrared, Sensor performance

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Proceedings Article | 30 September 2004 Paper

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

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 | 3 March 2003 Paper

Paper

Ground-based coronagraphy: performance of a four-quadrant phase mask

Elena Puga, Markus Feldt, Thomas Henning, Ernst-Bernhard Kley, Joana Costa, Peter Bizenberger, Stefan Hippler

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.458953

KEYWORDS: Stars, Coronagraphy, Telescopes, Control systems, High dynamic range imaging, Nulling interferometry, Device simulation, Optics manufacturing, Optical components, Adaptive optics

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Proceedings Article | 3 March 2003 Paper

Paper

Can we really go for direct exo-planet detection from the ground?

Markus Feldt, Thomas Henning, Stefan Hippler, Robert Weiss, M. Turatto, Ralph Neuhauser, Artie Hatzes, Hans Schmid, Rens Waters, Elena Puga, Joana Costa

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.457656

KEYWORDS: Planets, Adaptive optics, Stars, Polarimetry, Photons, Wavefront sensors, Polarization, Actuators, Imaging systems, Sensors

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Proceedings Article | 7 February 2003 Paper

Paper

The VLT laser guide star facility

Domenico Bonaccini, Eric Allaert, Constanza Araujo, Enzo Brunetto, Bernard Buzzoni, Mauro Comin, Martin Cullum, Richard Davies, Canio Dichirico, Philippe Dierickx, Martin Dimmler, Michel Duchateau, Carsten Egedal, Wolfgang Hackenberg, Stefan Hippler, Stefan Kellner, Arno van Kesteren, Franz Koch, Udo Neumann, Thomas Ott, Marco Quattri, Jutta Quentin, Sebastian Rabien, Roberto Tamai, Mario Tapia, Massimo Tarenghi

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459277

KEYWORDS: Telescopes, Relays, Laser guide stars, Continuous wave operation, Adaptive optics, Dye lasers, Diagnostics, Laser safety, Safety, Electronics

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Proceedings Article | 7 February 2003 Paper

Paper

LBT facility SCIDAR: recent results

Daniel McKenna, Remy Avila, John Hill, Stefan Hippler, Piero Salinari, Paul Stanton, Robert Weiss

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459302

KEYWORDS: Turbulence, Telescopes, Scintillation, Cameras, Adaptive optics, Image intensifiers, Sensors, Data modeling, Atmospheric modeling, Stars

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Proceedings Article | 7 February 2003 Paper

Paper

MAD: the ESO multiconjugate adaptive optics demonstrator

Enrico Marchetti, Norbert Hubin, Enrico Fedrigo, Joar Brynnel, Bernard Delabre, Robert Donaldson, Francis Franza, Rodolphe Conan, Miska Le Louarn, Cyril Cavadore, Andrea Balestra, Dietrich Baade, Jean-Luis Lizon, Roberto Gilmozzi, Guy Monnet, Roberto Ragazzoni, Carmelo Arcidiacono, Andrea Baruffolo, Emiliano Diolaiti, Jacopo Farinato, Elise Vernet-Viard, David Butler, Stefan Hippler, Antonio Amorin

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458859

KEYWORDS: Cameras, Wavefront sensors, Infrared cameras, Stars, Adaptive optics, Sensors, Telescopes, Deformable mirrors, Calibration, Atmospheric turbulence

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Proceedings Article | 7 February 2003 Paper

Paper

Operational issues for PARSEC, the VLT laser

Richard Davies, Thomas Ott, Jianlang Li, Sebastian Rabien, Udo Neumann, Stefan Hippler, Domenico Bonaccini, Wolfgang Hackenberg

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459068

KEYWORDS: Mirrors, Optical amplifiers, Sodium, Laser guide stars, Telescopes, Cameras, Observatories, Absorption, Fabry–Perot interferometers, Control systems

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Proceedings Article | 7 February 2003 Paper

Paper

PYRAMIR: a near-infrared pyramid wavefront sensor for the Calar Alto adaptive optics system

Joana Costa, Stefan Hippler, Markus Feldt, Simone Esposito, Roberto Ragazzoni, Peter Bizenberger, Elena Puga, Thomas Henning

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458940

KEYWORDS: Wavefront sensors, Sensors, Adaptive optics, Stars, Control systems, Infrared radiation, Telescopes, Real-time computing, Infrared sensors, Beam splitters

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Proceedings Article | 7 February 2003 Paper

Paper

Design of the atmospheric sodium profiler for the VLT laser guide star

David Butler, Stefan Hippler, Udo Neumann, Ralf-Rainer Rohloff, Bernard Grimm, Richard Davies

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458865

KEYWORDS: Sodium, LIDAR, Photons, Modulation, Bragg cells, Modulators, Data transmission, Laser guide stars, Avalanche photodetectors, Pulsed laser operation

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Proceedings Article | 7 February 2003 Paper

Paper

Numerical versus optical layer orientation: a comparison in terms of SNR

Dolores Bello, Jean-Marc Conan, Gerard Rousset, Massimiliano Tordi, Roberto Ragazzoni, Elise Vernet-Viard, Markus Kasper, Stefan Hippler

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459273

KEYWORDS: Signal to noise ratio, Stars, Wavefront sensors, Sensors, Tomography, Photons, K band, Interference (communication), Deformable mirrors, Optical testing

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Proceedings Article | 7 February 2003 Paper

Paper

Phase screens for astronomical multiconjugate adaptive optics: application to MAPS

David Butler, Enrico Marchetti, Jochen Bahr, Wenli Xu, Stefan Hippler, Markus Kasper, Rodolphe Conan

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458862

KEYWORDS: Glasses, Wavefronts, Adaptive optics, Turbulence, Refractive index, Mirrors, Atmospheric optics, Telescopes, Monochromatic aberrations, Optical design

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Proceedings Article | 7 February 2003 Paper

Paper

Design of PARSEC, the VLT laser

Sebastian Rabien, Richard Davies, Thomas Ott, J. Li, Stefan Hippler, Udo Neumann

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.457097

KEYWORDS: Optical amplifiers, Mirrors, Adaptive optics, Laser guide stars, Telescopes, Continuous wave operation, Polarization, Laser systems engineering, Laser stabilization, Dye lasers

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Proceedings Article | 7 February 2003 Paper

Paper

Performance improvements of Shack-Hartmann sensors with keystone design lenslet arrays

Markus Kasper, Stefan Hippler

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.457115

KEYWORDS: Wavefront sensors, Stars, Sensors, Adaptive optics, Signal to noise ratio, Lens design, Telescopes, Wavefronts, Wavefront reconstruction

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Proceedings Article | 4 February 2002 Paper

Paper

PARSEC: the laser for the VLT

Sebastian Rabien, Richard Davies, Thomas Ott, Stefan Hippler, Ulrich Neumann

Proceedings Volume 4494, (2002) https://doi.org/10.1117/12.454807

KEYWORDS: Sodium, Stars, Telescopes, Laser guide stars, Optical amplifiers, Adaptive optics, Dye lasers, Mirrors, Continuous wave operation, Astronomy

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Proceedings Article | 29 January 2002 Paper

Paper

Simultaneous SCIDAR and adaptive optics measurements: results and applications

Robert Weiss, Stefan Hippler, Markus Kasper, Markus Feldt

Proceedings Volume 4538, (2002) https://doi.org/10.1117/12.454400

KEYWORDS: Adaptive optics, Turbulence, Point spread functions, Telescopes, Stars, Near infrared, Cameras, Imaging systems, K band, Optical testing

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Proceedings Article | 7 July 2000 Paper

Paper

ALFA: three years of experience in adaptive optics with a laser guide star

Stefan Hippler, Markus Kasper, Markus Feldt, Robert Weiss, Douglas Looze, Luzma Montoya, Jesus Aceituno, Thomas Ott, Richard Davies

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390397

KEYWORDS: Adaptive optics, Telescopes, Laser guide stars, Wavefront sensors, Stars, Astronomy, K band, Sensors, Diffraction, Cameras

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Proceedings Article | 7 July 2000 Paper

Paper

Sodium layer monitoring at Calar Alto by LIDAR

David Butler, Richard Davies, Hayden Fews, R. Michael Redfern, Nancy Ageorges, Wolfgang Hackenberg, Ralf-Rainer Rohloff, Sebastian Rabien, Thomas Ott, Stefan Hippler

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390318

KEYWORDS: Sodium, Telescopes, LIDAR, Avalanche photodetectors, Photons, Pulsed laser operation, Laser guide stars, Calibration, Adaptive optics, Sensors

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Observations have shown the presence of sodium layer centroid height variations of a few hundred meters on timescales of tens of seconds. As quality laser guide star (LGS) plus adaptive optics (AO) assisted astronomy, especially on large (8m+) telescopes, will require optimal scheduling of observations and regular laser and wavefront sensor focusing at sites where sporadic sodium layers are frequent, an 'easy to use' sodium layer monitor is required. LIDAR offers a convenient means to achieve this. By pulsing the outgoing sodium laser and performing time-of-flight measurements on the returned photons we can acquire the altitude profile of the sodium layer. Unfortunately, conventional LIDAR requires the laser duty cycle to be very low, therefore large integration times are required. However, by using a cross-correlation technique the duty cycle can be increased to 50%, which gives far better performance. We present the details of this technique which involved amplitude modulation of the MPIA/MPE ALFA cw laser, as well as the following results of such LIDAR measurements performed in October 1999 at the 3.5 m telescope at Calar Alto Observatory in Spain. The altitude of the sodium layer at Calar Alto on 17th and 18th October 1999 was found to be at 90 +/- 3 km and there is evidence for sporadics on one of two nights with sporadic layer FWHM* varying from approximately 240 to 350 m. In addition, a noticeable layer FWHM change (excluding the sporadic layer) from approximately 13 to approximately 5 - 7 km was observed over the two nights. After flux and altitude calibration and correction of the projected altitude range, a very good agreement is found between sodium layer profiles derived from an auxiliary telescope and 3.5 m telescope LIDAR observations. Using an intensity weighted centroid algorithm the centroid height of the sodium layer was observed to have a variation of < 500 m in approximately 10 minutes. Although, shorter timescale variations may be have been present, poor observing conditions and resulting reduced S/N prevents this analysis.

Proceedings Article | 7 July 2000 Paper

Paper

Impact of adaptive optics on star formation research

Markus Feldt, Markus Kasper, Frank Eisenhauer, Stefan Hippler

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390383

KEYWORDS: Stars, Adaptive optics, Clouds, Point spread functions, Photons, Composites, Photometry, K band, Visualization, Wavefronts

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Proceedings Article | 5 July 2000 Paper

Paper

MIDI: controlling a two 8-m telescope Michelson interferometer for the thermal infrared

Stefan Hippler, Walter Jaffe, Richard Mathar, Clemens Storz, Karl Wagner, William Cotton, Guy Perrin, Markus Feldt

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390276

KEYWORDS: Control systems, Sensors, Infrared telescopes, Data archive systems, Data processing, Telescopes, Interferometry, Human-machine interfaces, Visibility, Infrared radiation

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Proceedings Article | 7 March 2000 Paper

Paper

Practical approach to modal basis selection and wavefront estimation

Markus Kasper, Douglas Looze, Stefan Hippler, Markus Feldt, Robert Weiss, Andreas Glindemann, Richard Davies

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390345

KEYWORDS: Wavefronts, Sensors, Stars, Actuators, Microlens array, Wavefront sensors, Digital signal processing, Error analysis, Adaptive optics, Condition numbers

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Proceedings Article | 11 September 1998 Paper

Paper

ALFA: the MPIA/MPE adaptive optics with a laser for astronomy project

Stefan Hippler, Andreas Glindemann, Markus Kasper, Paul Kalas, Ralf-Rainer Rohloff, Karl Wagner, Douglas Looze, Wolfgang Hackenberg

Proceedings Volume 3353, (1998) https://doi.org/10.1117/12.321708

KEYWORDS: Telescopes, Digital signal processing, Adaptive optics, Sensors, Mirrors, Cameras, Stars, Actuators, Deformable mirrors, Control systems

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Proceedings Article | 25 August 1998 Paper

Paper

Upgraded UKIRT

Timothy Hawarden, Nicholas Rees, Charles Cavedoni, Timothy Chuter, Antonio Chrysostomou, Donald Pettie, Richard Bennett, Eli Ettedgui-Atad, John Harris, Brian Mack, Eckhart Pitz, Andreas Glindemann, Stefan Hippler, Ralf-Rainer Rohloff, Karl Wagner

Proceedings Volume 3352, (1998) https://doi.org/10.1117/12.319306

KEYWORDS: Telescopes, Tin, Mirrors, Ions, Stars, Diffraction, Actuators, Monochromatic aberrations, Domes, Astronomy

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Proceedings Article | 18 September 1997 Paper

Paper

Progress on the UKIRT upgrades program

Nicholas Rees, Stefan Hippler

Proceedings Volume 3112, (1997) https://doi.org/10.1117/12.284221

KEYWORDS: Control systems, Telescopes, Mirrors, Charge-coupled devices, Monochromatic aberrations, Wavefronts, Imaging systems, Cameras, Image processing, CCD cameras

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Proceedings Article | 21 March 1997 Paper

Paper

Progress of the UKIRT Upgrades Program

Timothy Hawarden, Charles Cavedoni, Timothy Chuter, Ivan Look, Nicholas Rees, Donald Pettie, Richard Bennett, Eli Ettedgui-Atad, John Harris, Colin Humphries, Brian Mack, Eckhart Pitz, Andreas Glindemann, Stefan Hippler, Ralf-Rainer Rohloff, Karl Wagner

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.269048

KEYWORDS: Mirrors, Telescopes, Monochromatic aberrations, Control systems, Domes, Wavefronts, Diffraction, Active optics, Cooling systems, Imaging systems

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Proceedings Article | 8 June 1995 Paper

Paper

Controlling the UKIRT upgrades program

Nicholas Rees, Stefan Hippler

Proceedings Volume 2479, (1995) https://doi.org/10.1117/12.211429

KEYWORDS: Control systems, Telescopes, Human-machine interfaces, Servomechanisms, Mirrors, Computer programming, Secondary tip-tilt mirrors, Wavefront sensors, Control systems design, Computing systems

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Proceedings Article | 1 June 1994 Paper

Paper

Five-axis secondary system for UKIRT

Eckhart Pitz, Ralf-Rainer Rohloff, Stefan Hippler, Karl Wagner, Harry Marth

Proceedings Volume 2199, (1994) https://doi.org/10.1117/12.176217

KEYWORDS: Control systems, Mirrors, Electronics, Cameras, Imaging systems, Telescopes, CCD cameras, Electromechanical design, Actuators, Interfaces

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Proceedings Article | 20 October 1993 Paper

Paper

MAGIC: a new near-infrared camera for Calar Alto

Thomas Herbst, Steven Beckwith, Christoph Birk, Stefan Hippler, Mark McCaughrean, Filippo Mannucci, Juergen Wolf

Proceedings Volume 1946, (1993) https://doi.org/10.1117/12.158714

KEYWORDS: Telescopes, Cameras, Optical filters, Electronics, Infrared radiation, Infrared detectors, Sensors, Infrared cameras, Collimators, Detector arrays

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Showing 5 of 66 publications

Conference Committee Involvement (1)

Astronomical Adaptive Optics Systems and Applications

3 August 2003 | San Diego, California, United States

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