Mr. Julien Charton Profile

Julien Charton

CSO at Bertin Alpao

SPIE Involvement:

Author

Publications (40)

Proceedings Article | 28 August 2024 Presentation

Presentation

GNAO: the new AO facility for Gemini North, facility overview at preliminary design

Gaetano Sivo, Julia Scharwächter, Masen Lamb, Manuel Lazo, Célia Blain, Stephen Goodsell, Martin Tschimmel, Jennifer Lotz, Scott Dahm, Kim Tomasino-Reed, William Rambold, Joseph D'amato, Ricardo Cardenes, Tim Gaggstatter, Pedro Gigoux, Jed Diller, Thomas Schneider, Charles Cavedoni, Stacy Kang, Stanislas Karewicz, Heather Carr, Logan Sato, Paul Hirst, John White, Lindsay Magill, Molly Grogan, Suresh Sivanandam, Adam Muzzin, Scott Chapman, Uriel Conod, Jennifer Dunn, Jean-Pierre Véran, Edward Chapin, Morten Andersen, Franck Marchis, Ruben Diaz, John Blakeslee, Michael Pierce, Rodrigo Carrasco, Hwihyun Kim, Anja Feldmeier-Krause, Alan McConnachie, James Jee, Wesley Fraser, Mark Ammons, Christopher Packham, John Bally, Trent Dupuy, Daniel Huber, Chadwick Trujillo, Marcos van Dam, Jon Lawrence, Thierry Fusco, Benoît Neichel, Julien Charton, Marc Ferrari, Michael Goodwin, Sylvain Cetre, Pierre Jouve, Carlos Correia, Andrew Rakich, Jessica Zheng, Yizheng Wang, Timothy Chin, Lew Waller, Tony Farrell, Summer Luo, Jean-François Sauvage, Cédric Taïssir Héritier, Delphine Barbon-Dubosc, Francois Dolon, Nisrine Arab, Matthieu Grau

Proceedings Volume 13097, 130970J (2024) https://doi.org/10.1117/12.3019911

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Proceedings Article | 28 August 2024 Presentation

Presentation

Cassiopée: toward technological development for XAO on ELT

Benoît Neichel, Thierry Fusco, Jean-Luc Gach, Philippe Feautrier, Julien Charton, Piero Bruno, Francisco Oyarzun, Mathieu Motte, Jonathan Dray, Mahawa Cissé, Romain Fétick, Cédric Taïssir Heritier, Jean-Francois Sauvage

Proceedings Volume 13097, 130971G (2024) https://doi.org/10.1117/12.3019601

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Proceedings Article | 27 August 2024 Presentation + Paper

Presentation + Paper

Cassiopée, towards technological development for XAO on ELT: the e-APD infrared detector

Jean-Luc Gach, Piero Bruno, Julien Charton, Philippe Feautrier, Thierry Fusco, Benoit Neichel, Jean-François Sauvage

Proceedings Volume 13103, 131030C (2024) https://doi.org/10.1117/12.3019626

KEYWORDS: Cameras, Sensors, Vibration, Adaptive optics, Quantum efficiency, Design, Dark current, Optical filters

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Proceedings Article | 27 August 2024 Poster + Paper

Poster + Paper

Comparison of predictive control laws in adaptive optics for free-space optical communications

Jonathan Dray, Baptiste Sinquin, Morgan Gray, Benoit Neichel, Cédric Taïssir Héritier, Carlos Correia, Raissa Camelo, Jalo Nousiainen, Thierry Fusco, Cyril Petit, Armin Schimpf, Julien Charton

Proceedings Volume 13097, 130977W (2024) https://doi.org/10.1117/12.3019728

KEYWORDS: Adaptive optics, Wavefront sensors, Machine learning, Simulations, Free space optics, Matrices, Free space optical communications, Adaptive control, Signal filtering, Performance modeling

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Proceedings Article | 27 August 2024 Presentation + Paper

Presentation + Paper

Advanced control of ALPAO DMs leads to significant AO performance improvements

I. Boudjema, B. Sinquin, A. Schimpf, H. Forrière, B. Martin, J. Charton

Proceedings Volume 13097, 130970Y (2024) https://doi.org/10.1117/12.3020100

KEYWORDS: Adaptive optics, Actuators, Wave propagation, Deformable mirrors, Real-time computing, Free space optical communications, Control systems, Telecommunications

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Proceedings Article | 27 August 2024 Paper

Paper

AOB: the new adaptive optics bench at Gemini North

Pierre Jouve, Carlos Correia, Thierry Fusco, Benoit Neichel, Andrew Rakich, Jon Lawrence, Julien Charton, Timothy Chin, Michael Goodwin, Masen Lamb, Gaetano Sivo

Proceedings Volume 13097, 130976C (2024) https://doi.org/10.1117/12.3019126

KEYWORDS: Adaptive optics, Super resolution, Stars, Imaging systems, Design, Gemini Observatory, Vibration, Calibration, Point spread functions, Commercial off the shelf technology

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Proceedings Article | 3 October 2022 Presentation

Presentation

Modelling the mysteries of temporal effects in deformable mirrors: Fast and accurate dynamic model

Julien Charton, Stefan Ströbele, Lorenzo Pettazzi, Pierre-Yves Madec

Proceedings Volume 12185, 121850M (2022) https://doi.org/10.1117/12.2629418

KEYWORDS: Deformable mirrors, Modeling, Adaptive optics, Actuators, Finite element methods, Systems modeling, Manufacturing, MATLAB, Control systems, Wave propagation

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

ESO’s ultra-fast wavefront sensor unveils the mysteries of deformable mirrors’ temporal behaviour

S. Ströbele, L. Pettazzi, J. Charton, P.-Y. Madec, P. Pathak, M. Kasper

Proceedings Volume 12185, 1218526 (2022) https://doi.org/10.1117/12.2627917

KEYWORDS: Actuators, Cameras, Adaptive optics, Deformable mirrors, Phase measurement, Wavefronts, Wavefront sensors

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Proceedings Article | 24 September 2021 Presentation + Paper

Presentation + Paper

Current status of PAPYRUS: the pyramid based adaptive optics system at LAM/OHP

E. Muslimov, N. Levraud, V. Chambouleyron, I. Boudjema, A. Lau, A. Caillat, F. Pedreros, G. Otten, K. El Hadi, K. Joaquina, M. Maxime, M. El Morsy, O. Beltramo-Martin, R. Fétick, Z. Ke, J-F. Sauvage, B. Neichel, T. Fusco, J. Schmitt, A. Le Van Suu, J. Charton, A. Schimpf, B. Martin, F. Dintrono, S. Esposito, E. Pina

Proceedings Volume 11876, 118760H (2021) https://doi.org/10.1117/12.2597170

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Proceedings Article | 9 September 2019 Paper

Paper

The low-order wavefront control system for the PICTURE-C mission: deformable mirror anti-aliasing through temporal dithering

Kuravi Hewawasam, Christopher Mendillo, Glenn Howe, Jason Martel, Susanna Finn, Timothy Cook, Julien Charton, Pierre Mahiou, Supriya Chakrabarti

Proceedings Volume 11117, 111171Q (2019) https://doi.org/10.1117/12.2529706

KEYWORDS: Actuators, Wavefronts, Wavefront sensors, Interfaces, Control systems, Mirrors, Clocks, Deformable mirrors, Analog electronics, Coronagraphy

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Proceedings Article | 7 August 2014 Paper

Paper

Recent improvements of high density magnetic deformable mirrors: faster, larger and stronger

Julien Charton, Urban Bitenc, Jean-Francois Curis, Sebastien Camet, Romain Di Chiaro, Rozenn Bougeard

Proceedings Volume 9148, 914825 (2014) https://doi.org/10.1117/12.2055872

KEYWORDS: Actuators, Deformable mirrors, Magnetism, Wavefronts, Adaptive optics, Manufacturing, Monte Carlo methods, Algorithm development, Prototyping, Optimization (mathematics)

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Proceedings Article | 21 July 2014 Paper

Paper

1500Hz adaptive optics system using commercially available components

Armin Schimpf, Mickael Micallef, Julien Charton

Proceedings Volume 9148, 914851 (2014) https://doi.org/10.1117/12.2056395

KEYWORDS: Adaptive optics, Wavefront sensors, Cameras, Deformable mirrors, Wavefronts, Actuators, System integration, Sensors, Electron multiplying charge coupled devices, Control systems

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Proceedings Article | 26 September 2013 Paper

Paper

Sphere: complete laboratory performance and prediction for on-sky first light

Jean-François Sauvage, Jean-Luc Beuzit, Ronald Roelfsema, Markus Feldt, Kjetil Dohlen, David Mouillet, Pascal Puget, Francois Wildi, Lyu Abe, Andrea Baruffolo, Pierre Baudoz, Andreas Bazzon, Anthony Boccaletti, Tristan Buey, Marcel Carbillet, Julien Charton, Riccardo Claudi, Anne Costille, Alain Delboulbé, Silvano Desidera, Carsten Dominik, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Enrico Giro, Laurence Gluck, Raffaele Gratton, Thomas Henning, Norbert Hubin, Markus Kasper, Anne-Marie Lagrange, Maud Langlois, David Le Mignant, Jean-Louis Lizon, Fabrice Madec, Yves Magnard, Patrice Martinez, Dino Mesa, Ole Möller-Nilsson, Thibaut Moulin, Claire Moutou, Alexey Pavlov, Denis Perret, Cyril Petit, Johan Pragt, Patrick Rabou, Sylvain Rochat, Bernardo Salasnich, Gérard Rousset, Hans-Martin Schmid, Arnaud Sevin, Christian Soenke, Eric Stadler, Marcos Suarez, Massimo Turatto, Stéphane Udry, Arthur Vigan, Farrokh Vakili, Gérard Zins, Alice Zurlo

Proceedings Volume 8864, 88640B (2013) https://doi.org/10.1117/12.2025562

KEYWORDS: Optical spheres, Coronagraphy, Turbulence, Exoplanets, Stars, Planets, Iterated function systems, Adaptive optics, Visible radiation, Polarimetry

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Proceedings Article | 13 September 2012 Paper

Paper

The SPHERE XAO system SAXO: integration, test, and laboratory performance

C. Petit, J.-F. Sauvage, A. Sevin, A. Costille, T. Fusco, P. Baudoz, J.-L. Beuzit, T. Buey, J. Charton, K. Dohlen, P. Feautrier, E. Fedrigo, J.-L. Gach, N. Hubin, E. Hugot, M. Kasper, D. Mouillet, D. Perret, P. Puget, J.-C. Sinquin, C. Soenke, M. Suarez, F. Wildi

Proceedings Volume 8447, 84471Z (2012) https://doi.org/10.1117/12.925919

KEYWORDS: Adaptive optics, Optical spheres, Turbulence, Spatial filters, Point spread functions, Coronagraphy, Imaging systems, Real-time computing, Wavefronts, Control systems

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Proceedings Article | 15 September 2011 Paper

Paper

The performance of the SPHERE sub-systems in the integration lab

François Wildi, Jean Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Anthony Bocaletti, Riccardo Claudi, Anne Costille, Philippe Feautrier, Thierry Fusco, Raffaele Gratton, Markus Kasper, Maud Langlois, Patrice Martinez, Dino Mesa, David Le Mignant, Alexey Pavlov, Cyril Petit, Johannes Pragt, Patrick Rabou, Sylvain Rochat, Ronald Roelfsema, Jean-François Sauvage, Hans Martin Schmid, Eric Stadler, Claire Moutou

Proceedings Volume 8151, 81510M (2011) https://doi.org/10.1117/12.894389

KEYWORDS: Optical spheres, Sensors, Adaptive optics, Coronagraphy, Stars, Iterated function systems, Planets, Point spread functions, Polarimetry, Image filtering

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Proceedings Article | 15 September 2011 Paper

Paper

The ZIMPOL high contrast imaging polarimeter for SPHERE: sub-system test results

Ronald Roelfsema, Daniel Gisler, Johan Pragt, Hans Martin Schmid, Andreas Bazzon, Carsten Dominik, Andrea Baruffolo, Jean-Luc Beuzit, Julien Charton, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Markus Feldt, Menno de Haan, Norbert Hubin, Markus Kasper, Christoph Keller, Jean-Louis Lizon, David Mouillet, Alexey Pavlov, Pascal Puget, Sylvain Rochat, Bernardo Salasnich, Peter Steiner, Christian Thalmann, Rens Waters, François Wildi

Proceedings Volume 8151, 81510N (2011) https://doi.org/10.1117/12.893101

KEYWORDS: Polarization, Polarimetry, Planets, Sensors, Stars, Exoplanets, Modulators, Optical spheres, Coronagraphy, Demodulation

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Proceedings Article | 14 February 2011 Paper

Paper

Recent developments and future challenges for MEMS adaptive optics

F. Rooms, J. Charton

Proceedings Volume 7931, 793109 (2011) https://doi.org/10.1117/12.876475

KEYWORDS: Adaptive optics, Deformable mirrors, Actuators, Wavefronts, Microelectromechanical systems, Mirrors, Sensors, Electronics, Wavefront sensors, Control systems

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Proceedings Article | 28 July 2010 Paper

Paper

SAXO, the eXtreme Adaptive Optics System of SPHERE: overview and calibration procedure

J.-F. Sauvage, T. Fusco, C. Petit, S. Meimon, E. Fedrigo, M. Suarez Valles, M. Kasper, N. Hubin, J.-L. Beuzit, J. Charton, A. Costille, P,. Rabou, D. Mouillet, P. Baudoz, T. Buey, A. Sevin, F. Wildi, K. Dohlen

Proceedings Volume 7736, 77360F (2010) https://doi.org/10.1117/12.856942

KEYWORDS: Adaptive optics, Optical spheres, Turbulence, Calibration, Coronagraphy, Exoplanets, Filtering (signal processing), Sensors, Signal processing, Phase measurement

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Proceedings Article | 21 July 2010 Paper

Paper

The differential tip-tilt sensor of SPHERE

Pierre Baudoz, Reinhold Dorn, Jean-Louis Lizon, Thierry Fusco, Kjetil Dohlen, Julien Charton, Jean-Luc Beuzit, Pascal Puget, David Mouillet, Markus Felt, Francois Wildi, Andrea Barrufolo, Markus Kasper, Norbert Hubin

Proceedings Volume 7735, 77355B (2010) https://doi.org/10.1117/12.858274

KEYWORDS: Sensors, Optical spheres, Coronagraphy, Stars, Adaptive optics, Visible radiation, Near infrared, Infrared imaging, Wavefront sensors, Temperature metrology

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Proceedings Article | 20 July 2010 Paper

Paper

The ZIMPOL high-contrast imaging polarimeter for SPHERE: design, manufacturing, and testing

Ronald Roelfsema, Hans Martin Schmid, Johannes Pragt, Daniel Gisler, Rens Waters, Andreas Bazzon, Andrea Baruffolo, Jean-Luc Beuzit, Anthony Boccaletti, Julien Charton, Claudio Cumani, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Markus Feldt, Charlotte Groothuis, Menno de Haan, Hiddo Hanenburg, Norbert Hubin, Franco Joos, Markus Kasper, Christoph Keller, Jan Kragt, Jean-Louis Lizon, David Mouillet, Aleksej Pavlov, Florence Rigal, Sylvain Rochat, Bernardo Salasnich, Peter Steiner, Christian Thalmann, Lars Venema, François Wildi

Proceedings Volume 7735, 77354B (2010) https://doi.org/10.1117/12.857045

KEYWORDS: Polarization, Charge-coupled devices, Sensors, Polarimetry, Modulators, Optical spheres, Planets, Mirrors, Stars, Modulation

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Proceedings Article | 18 September 2009 Paper

Paper

Improvement of science throughput of 1m class telescopes thanks to COTS adaptive optics

F. Rooms, J. Charton, L. Jocou, S. Cetre, T. Fusco

Proceedings Volume 7439, 74390O (2009) https://doi.org/10.1117/12.826820

KEYWORDS: Adaptive optics, Telescopes, Deformable mirrors, Wavefront sensors, Actuators, Commercial off the shelf technology, Photons, Electron multiplying charge coupled devices, Wavefronts, Sensors

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Proceedings Article | 20 August 2009 Paper

Paper

Calibrating SPHERE, the exo-planet imager for the VLT

Francois Wildi, David Mouillet, Jean-Luc Beuzit, Markus Feldt, Kjetil Dohlen, Thierry Fusco, Cyril Petit, Silvano Desidera, Raffaele Gratton, Hans-Martin Schmid, Maud Langlois, A. Vigan, Julien Charton, Riccardo Claudi, Ronald Roelfsema, Andrea Baruffolo, Pascal Puget

Proceedings Volume 7440, 74400Q (2009) https://doi.org/10.1117/12.826535

KEYWORDS: Calibration, Optical spheres, Polarization, Sensors, Adaptive optics, Coronagraphy, Polarimetry, Telescopes, Imaging systems, Near infrared

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Proceedings Article | 20 August 2009 Paper

Paper

SPHERE: the VLT planet imager in the post FDR phase

Francois Wildi, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Pierre Baudoz, Anthony Boccaletti, Lyu Abe, Riccardo Claudi, Philippe Feautrier, Thierry Fusco, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Rainer Lenzen, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Ronald Roelfsema, Michel Saisse, Hans Martin Schmid, Eric Stadler, Claire Moutou, Massimo Turatto, Stephane Udry, Rens Waters, Thomas Henning, Anne-Marie Lagrange, Farrokh Vakili

Proceedings Volume 7440, 74400P (2009) https://doi.org/10.1117/12.826521

KEYWORDS: Optical spheres, Planets, Adaptive optics, Iterated function systems, Imaging systems, Coronagraphy, Stars, Polarimetry, Sensors, Exoplanets

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Proceedings Article | 24 February 2009 Paper

Paper

A new deformable mirror and experimental setup for free-space optical communication

F. Rooms, S. Camet, J. Charton, J.-F. Curis, L. Jocou

Proceedings Volume 7199, 71990O (2009) https://doi.org/10.1117/12.817253

KEYWORDS: Deformable mirrors, Adaptive optics, Free space optics, Actuators, Free space optical communications, Mirrors, Wavefront sensors, Cameras, Wavefronts, Monochromatic aberrations

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Proceedings Article | 25 July 2008 Paper

Paper

SPHERE: a planet finder instrument for the VLT

Jean-Luc Beuzit, Markus Feldt, Kjetil Dohlen, David Mouillet, Pascal Puget, Francois Wildi, Lyu Abe, Jacopo Antichi, Andrea Baruffolo, Pierre Baudoz, Anthony Boccaletti, Marcel Carbillet, Julien Charton, Riccardo Claudi, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Jean-Luc Gach, Raffaele Gratton, Thomas Henning, Norbert Hubin, Franco Joos, Markus Kasper, Maud Langlois, Rainer Lenzen, Claire Moutou, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Florence Rigal, Ronald Roelfsema, Gérard Rousset, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Christian Thalmann, Massimo Turatto, Stéphane Udry, Farrokh Vakili, Rens Waters

Proceedings Volume 7014, 701418 (2008) https://doi.org/10.1117/12.790120

KEYWORDS: Planets, Optical spheres, Stars, Coronagraphy, Sensors, Iterated function systems, Adaptive optics, Near infrared, Polarimetry, Calibration

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Proceedings Article | 12 July 2008 Paper

Paper

The SPHERE XAO system: design and performance

Cyril Petit, Thierry Fusco, Julien Charton, David Mouillet, Patrick Rabou, Tristan Buey, Gérard Rousset, Jean-François Sauvage, Pierre Baudoz, Pierre Gigan, Markus Kasper, Enrico Fedrigo, Norbert Hubin, Philippe Feautrier, Jean-Luc Beuzit, Pascal Puget

Proceedings Volume 7015, 70151U (2008) https://doi.org/10.1117/12.790308

KEYWORDS: Adaptive optics, Coronagraphy, Optical spheres, Calibration, Sensors, Imaging systems, Stars, Telescopes, Near infrared, Cameras

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Proceedings Article | 24 September 2007 Paper

Paper

The SPHERE exoplanet imager: status report at PDR

Francois Wildi, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Jacopo Antichi, Pierre Baudoz, Anthony Boccaletti, Marcel Carbillet, Riccardo Claudi, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Rainer Lenzen, Claire Moutou, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Ronald Roelfsema, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Christian Thalmann, Massimo Turatto, Stéphane Udry, Rens Waters, Thomas Henning, Anne-Marie Lagrange, Farrokh Vakili

Proceedings Volume 6691, 66910L (2007) https://doi.org/10.1117/12.734785

KEYWORDS: Optical spheres, Stars, Planets, Coronagraphy, Iterated function systems, Sensors, Imaging spectroscopy, Near infrared, Adaptive optics, Polarization

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Proceedings Article | 28 June 2006 Paper

Paper

SPHERE: A planet finder instrument for the VLT

Kjetil Dohlen, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Pascal Puget, Jacopo Antichi, Andrea Baruffolo, Pierre Baudoz, Alessandro Berton, Anthony Boccaletti, Marcel Carbillet, Julien Charton, Riccardo Claudi, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Jean-Luc Gach, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Andy Longmore, Claire Moutou, Cyril Petit, Johan Pragt, Patrick Rabou, Gerard Rousset, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Daphne Stamm, Massimo Turatto, Rens Waters, Francois Wildi

Proceedings Volume 6269, 62690Q (2006) https://doi.org/10.1117/12.671537

KEYWORDS: Coronagraphy, Stars, Adaptive optics, Optical spheres, Planets, Sensors, Iterated function systems, Polarimetry, Cameras, Polarization

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Proceedings Article | 23 January 2006 Paper

Paper

A new deformable mirror for adaptive optics

R. Rousier, C. Divoux, H. Grange, J. Charton, M. H. Vaudaine, L. Jocou, N. Raphoz, M. Trzmiel, C. Pisella, C. Chappaz

Proceedings Volume 6114, 61140K (2006) https://doi.org/10.1117/12.651659

KEYWORDS: Actuators, Mirrors, Silicon, Electrodes, Deformable mirrors, Dielectrics, Semiconducting wafers, Etching, Wavefronts, Optical lithography

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Proceedings Article | 25 October 2004 Paper

Paper

NAOS performance characterization and turbulence parameters estimation using closed-loop data

Thierry Fusco, Nancy Ageorges, Gerard Rousset, Didier Rabaud, Eric Gendron, David Mouillet, Francois Lacombe, Gerard Zins, Julien Charton, Christopher Lidman, Norbert Hubin

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.563009

KEYWORDS: Adaptive optics, Turbulence, Telescopes, Real-time computing, Stars, Data analysis, Computing systems, Error analysis, Signal to noise ratio, Large telescopes

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Proceedings Article | 25 October 2004 Paper

Paper

LGS implementation for NAOS

Markus Kasper, Julien Charton, Bernhard Delabre, Rob Donaldson, Enrico Fedrigo, Guy Hess, Norbert Hubin, Jean-Louis Lizon, Matty Nylund, Christian Soenke, Gerard Zins

Proceedings Volume 5490, (2004) https://doi.org/10.1117/12.551650

KEYWORDS: Adaptive optics, Sodium, LIDAR, Stars, Mirrors, Telescopes, Calibration, Wavefront sensors, Sensors, Avalanche photodetectors

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Proceedings Article | 7 February 2003 Paper

Paper

Performances and results on the sky of the NAOS visible wavefront sensor

Philippe Feautrier, Gerard Rousset, Reinhold Dorn, Cyril Cavadore, Julien Charton, Claudio Cumani, Thierry Fusco, Norbert Hubin, Pierre Kern, Jean-Luis Lizon, Yves Magnard, Pascal Puget, Didier Rabaud, Patrick Rabou, Eric Stadler

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.458945

KEYWORDS: Charge-coupled devices, Wavefront sensors, Sensors, CCD cameras, CCD image sensors, Adaptive optics, Visible radiation, Stars, Telescopes, Staring arrays

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Proceedings Article | 7 February 2003 Paper

Paper

NAOS--the first AO system of the VLT: on-sky performance

Gerard Rousset, Francois Lacombe, Pascal Puget, Norbert Hubin, Eric Gendron, Thierry Fusco, Robin Arsenault, Julien Charton, Philippe Feautrier, Pierre Gigan, Pierre Kern, Anne-Marie Lagrange, Pierre-Yves Madec, David Mouillet, Didier Rabaud, Patrick Rabou, Eric Stadler, Gerard Zins

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459332

KEYWORDS: Stars, Adaptive optics, Telescopes, Mirrors, Calibration, Infrared imaging, Cameras, Real-time computing, Deformable mirrors, Point spread functions

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Proceedings Article | 7 February 2003 Paper

Paper

NAOS: from an AO system to an astronomical instrument

Francois Lacombe, Gerard Zins, Julien Charton, G. Chauvin, Guillaume Dumont, Philippe Feautrier, Thierry Fusco, Eric Gendron, Norbert Hubin, Pierre Kern, Anne-Marie Lagrange, David Mouillet, Pascal Puget, Didier Rabaud, Patrick Rabou, Gerard Rousset, Jean-Luc Beuzit

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459739

KEYWORDS: Adaptive optics, Astronomy, Refraction, Infrared imaging, Atmospheric optics, Visible radiation, Telescopes, Planets, Thermography, Stars

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Proceedings Article | 7 February 2003 Paper

Paper

NAOS infrared wavefront sensor design and performance

Eric Gendron, Francois Lacombe, Daniel Rouan, Julien Charton, Claude Collin, Bertrand Lefort, Claude Marlot, Genevieve Michet, Gerard Nicol, Sylvain Pau, V. Phan, Bernard Talureau, Jean-Luis Lizon, Norbert Hubin

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.460025

KEYWORDS: Sensors, Microlens, Infrared sensors, Video, Optical filters, Clocks, Adaptive optics, Wavefront sensors, Charge-coupled devices, Glasses

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Proceedings Article | 30 January 2003 Paper

Paper

System-level simulation of micromirrors for adaptive optics

Julien Charton, Zoltan Hubert, Eric Stadler, Wilfrid Schartz, Jean-Luc Beuzit

Proceedings Volume 4842, (2003) https://doi.org/10.1117/12.458104

KEYWORDS: Actuators, Mirrors, Adaptive optics, Systems modeling, Computer simulations, Finite element methods, Electrodes, 3D modeling, Micromirrors, Computer aided design

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Proceedings Article | 20 January 2003 Paper

Paper

A micromachined deformable mirror for adaptive optics

Wilfrid Schwartz, Claire Divoux, Jacques Margail, Laurent Jocou, Julien Charton, Eric Stadler, Thomas Jager, Fabrice Casset, T. Enot

Proceedings Volume 4983, (2003) https://doi.org/10.1117/12.477924

KEYWORDS: Actuators, Silicon, Mirrors, Adaptive optics, Polymers, Deformable mirrors, Etching, Polymeric actuators, Electrodes, Dry etching

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Proceedings Article | 7 July 2000 Paper

Paper

NAOS real-time computer for optimized closed-loop and online performance estimation

Didier Rabaud, Frederic Chazallet, Gerard Rousset, Catherine Amra, Benoit Argast, Joseph Montri, Guillaume Dumont, Beatrice Sorrente, Pierre-Yves Madec, Eric Gendron, Robin Arsenault, David Mouillet, Norbert Hubin, Julien Charton

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390359

KEYWORDS: Real-time computing, Sensors, Video, Adaptive optics, Wavefronts, Point spread functions, Digital signal processing, Wavefront sensors, Laser guide stars, Signal processing

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Proceedings Article | 7 July 2000 Paper

Paper

Status of the VLT Nasmyth adaptive optics system (NAOS)

Gerard Rousset, Francois Lacombe, Pascal Puget, Eric Gendron, Robin Arsenault, Pierre Kern, Didier Rabaud, Pierre-Yves Madec, Norbert Hubin, Gerard Zins, Eric Stadler, Julien Charton, Pierre Gigan, Philippe Feautrier

Proceedings Volume 4007, (2000) https://doi.org/10.1117/12.390304

KEYWORDS: Mirrors, Adaptive optics, Actuators, Cameras, Deformable mirrors, Manufacturing, Real-time computing, Telescopes, Wavefront sensors, Sensors

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Proceedings Article | 16 June 2000 Paper

Paper

NAOS computer-aided control: an optimized and astronomer-oriented way of controlling large adaptive optics systems

Gerard Zins, Francois Lacombe, Jens Knudstrup, David Mouillet, Didier Rabaud, Stephane Marteau, Laurent Rousset-Rouviere, Olivier Rondeaux, Julien Charton, Bertrand Lefort, Gerard Rousset, Norbert Hubin

Proceedings Volume 4009, (2000) https://doi.org/10.1117/12.388412

KEYWORDS: Adaptive optics, Control systems, Telescopes, Wavefront sensors, Calibration, Astronomy, Sensors, Space telescopes, Data archive systems, Turbulence

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