Mr. Stefan Kellner Profile

Stefan Kellner

at Max Planck Institut fur extraterrestrische Physik

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 9 July 2018 Open Access

Open Access

Presentation + Paper

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 | 4 August 2016 Open Access

Open Access

Paper

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 | 24 July 2014 Paper

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 Open Access

Open Access

Paper

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

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 Open Access

Open Access

Paper

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

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

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

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

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Proceedings Article | 24 July 2014 Open Access

Open Access

Paper

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 Open Access

Open Access

Paper

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 Paper

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 | 18 July 2014 Paper

Paper

Low vibration cooling using a pulse tube cooler and cryostat for the GRAVITY beam combiner instrument at the VLTI

M. Haug, F. Haussmann, S. Kellner, L. Kern, F. Eisenhauer, J.-L. Lizon, M. Dietrich, G. Thummes

Proceedings Volume 9151, 91513C (2014) https://doi.org/10.1117/12.2054729

KEYWORDS: Optical benches, Sensors, Copper, Liquids, Nitrogen, Photonic integrated circuits, Control systems, Fiber couplers, Imaging systems, Cameras

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Proceedings Article | 12 September 2012 Paper

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

Paper

The cryostat for the GRAVITY beam combiner instrument at the VLTI

M. Haug, F. Haussmann, S. Kellner, R. Hofmann, J. Eder, F. Eisenhauer, J.-L. Lizon, G. Thummes, H. Weisz

Proceedings Volume 8445, 84452V (2012) https://doi.org/10.1117/12.925312

KEYWORDS: Optical benches, Sensors, Nitrogen, Fiber couplers, Copper, Liquids, Imaging systems, Control systems, Cameras, Spectrographs

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Proceedings Article | 12 September 2012 Paper

Paper

GRAVITY: metrology

Stefan Gillessen, Magdalena Lippa, Frank Eisenhauer, Oliver Pfuhl, Marcus Haug, Stefan Kellner, Thomas Ott, Ekkehard Wieprecht, Eckhard Sturm, Frank Haußmann, Clemens Kister, David Moch, Markus Thiel

Proceedings Volume 8445, 84451O (2012) https://doi.org/10.1117/12.926813

KEYWORDS: Metrology, Telescopes, Optical fibers, Mirrors, Diodes, Phase shifts, Phase measurement, Interferometry, Space telescopes, Photodiodes

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Proceedings Article | 22 July 2010 Paper

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

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 Open Access

Open Access

Paper

GRAVITY: a four telescope beam combiner instrument for the VLTI

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

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

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

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Proceedings Article | 22 July 2010 Paper

Paper

The GRAVITY 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 | 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 | 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 | 4 July 2006 Paper

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 | 28 June 2006 Paper

Paper

Eliminating perspective elongation for LGS based AO systems at ELTs

Stephan Kellner, Roberto Ragazzoni, Emiliano Diolaiti, Wolfgang Gaessler, Jacopo Farinato

Proceedings Volume 6272, 62725E (2006) https://doi.org/10.1117/12.671029

KEYWORDS: Telescopes, Wavefronts, Wavefront sensors, Sensors, Bessel beams, Adaptive optics, Stars, Sodium, Radio propagation, Diffraction

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Proceedings Article | 28 June 2006 Paper

Paper

Multiconjugated adaptive optics for ELTs: an enhancement of the PIGS setup

E. Meyer, W. Gaessler, S. Kellner, E. Diolaiti, S. Egner, R. Ragazzoni, J. Farinato

Proceedings Volume 6272, 62723Q (2006) https://doi.org/10.1117/12.671365

KEYWORDS: Adaptive optics, Sensors, Light sources, Telescopes, Interferometers, Wavefronts, Wavefront sensors, Reflectivity, Laser guide stars, Stars

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Proceedings Article | 28 June 2006 Paper

Paper

VLTI-PRIMA fringe tracking testbed

Roberto Abuter, Sebastian Rabien, Frank Eisenhauer, Johannes Sahlmann, Nicola Di Lieto, Marcus Haug, Anders Wallander, Samuel Lévêque, Serge Ménardi, Françoise Delplancke, Nicolas Schuhler, Stefan Kellner, Robert Frahm

Proceedings Volume 6268, 62682Y (2006) https://doi.org/10.1117/12.671318

KEYWORDS: Mirrors, Sensors, Control systems, Relays, Observatories, Atmospheric optics, Laser metrology, Device simulation, Optical simulations, Optics manufacturing

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Proceedings Article | 27 June 2006 Paper

Paper

Adaptive optics developments at Keck Observatory

Peter Wizinowich, Jason Chin, Erik Johansson, Stephan Kellner, Robert Lafon, David Le Mignant, Chris Neyman, Paul Stomski, Doug Summers, Roger Sumner, Marcos van Dam

Proceedings Volume 6272, 627209 (2006) https://doi.org/10.1117/12.672104

KEYWORDS: Adaptive optics, Wavefronts, Cameras, Telescopes, Wavefront sensors, Keck Observatory, Stars, Imaging systems, Mirrors, Control systems

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Proceedings Article | 25 October 2004 Paper

Paper

PIGS: first results on sky

Stephan Kellner, Roberto Ragazzoni, Wolfgang Gassler, Emiliano Diolaiti, Timothy Morris, Christopher Saunter, R. Meyers, Jacopo Farinato, Carmelo Arcidiacono, Adriano Ghedina

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551722

KEYWORDS: Wavefronts, Telescopes, Sensors, Adaptive optics, Stars, Sodium, Rods, CCD cameras, Mirrors, Wavefront sensors

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Proceedings Article | 25 October 2004 Paper

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 | 25 October 2004 Paper

Paper

Test performance of the PARSEC laser system

Sebastian Rabien, Richard Davies, Thomas Ott, Jianlang Li, Roberto Abuter, Stefan Kellner, Udo Neumann

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551572

KEYWORDS: Optical amplifiers, Laser systems engineering, Laser guide stars, Sodium, Mirrors, Continuous wave operation, Stars, Adaptive optics, High power lasers, Fabry–Perot interferometers

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Proceedings Article | 7 July 2004 Paper

Paper

PIGS on sky - dream or reality?

Stephan Kellner, Roberto Ragazzoni, Wolfgang Gassler, Emiliano Diolaiti, Jacopo Farinato, Carmelo Arcidiacono, Richard Myers, Tim Morris, Adriano Ghedina

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566234

KEYWORDS: Sensors, Stars, Telescopes, Wavefront sensors, Adaptive optics, Laser guide stars, Sodium, Wavefronts, Glasses, Wavefront distortions

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Proceedings Article | 7 July 2004 Paper

Paper

Layer-Oriented on paper, laboratory, and soon on the sky

Jacopo Farinato, Roberto Ragazzoni, Carmelo Arcidiacono, Bagnara Paolo, Andrea Baruffolo, Harald Baumeister, Raffaella Bisson, Hermann Bohnhardt, Angela Brindisi, Joar Brynnel, Massimo Cecconi, Julien Coyne, Bernhard Delabre, Emiliano Diolaiti, Rob Donaldson, Enrico Fedrigo, Francis Franza, Wolfgang Gassler, Adriano Ghedina, Thomas Herbst, Norbert Hubin, Stephan Kellner, Johann Kolb, Jean-Louis Lizon, Matteo Lombini, Enrico Marchetti, Gianluigi Meneghini, Lars Mohr, Roland Reiss, Ralf-Rainer Rohloff, Roberto Soci, Elise Vernet, Robert Weiss, Marco Xompero, Wenli Xu

Proceedings Volume 5382, (2004) https://doi.org/10.1117/12.566345

KEYWORDS: Sensors, Stars, Wavefront sensors, Telescopes, Adaptive optics, Mirrors, Interferometry, Wavefronts, Prototyping, Deformable mirrors

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Proceedings Article | 7 March 2003 Paper

Paper

Design and results of the fast timing photo-polarimeter OPTIMA

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

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

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

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Proceedings Article | 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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Showing 5 of 31 publications

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