Dr. Clémentine Béchet Profile

Dr. Clémentine Béchet

at CRAL - Observatoire de Lyon

SPIE Involvement:

Conference Program Committee | Author

Publications (31)

Proceedings Article | 3 September 2024 Poster + Paper

Poster + Paper

Upgrading SPHERE with the second stage AO system SAXO+: exploration of the parameter space with end-to-end numerical simulations

Charles Goulas, Raphaël Galicher, Fabrice Vidal, Johan Mazoyer, Florian Ferreira, Arnaud Sevin, Anthony Boccaletti, Eric Gendron, Clémentine Béchet, Michel Tallon, Isabelle Tallon, Maud Langlois, Magali Loupias, Eric Thiébaut, Caroline Kulcsár, Henri-François Raynaud, Nicolas Galland, Laura Schreiber, Emiliano Diolaiti, Isaac Bernardino Dinis, François Wildi, Gaël Chauvin, Julien Milli, David Mouillet, Markus Feldt, Markus Kasper, Miska Lelouarn, Raffaele Gratton

Proceedings Volume 13097, 1309769 (2024) https://doi.org/10.1117/12.3018709

KEYWORDS: Wavefront sensors, Adaptive optics, Coronagraphy, Turbulence, Actuators, Stars, Numerical simulations, Deformable mirrors

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Proceedings Article | 27 August 2024 Poster + Paper

Poster + Paper

Upgrading SPHERE with the second stage AO system SAXO+: frequency-based data-driven controller for adaptive optics

Isaac Dinis, François Wildi, Damien Ségransan, Vaibhav Gupta, Alireza Karimi, Michel Tallon, Isabelle Bosc, Maud Langlois, Magali Loupias, Clémentine Bechet, Eric Thiébaut, Charles Goulas, Florian Ferreira, Anthony Boccaletti, Fabrice Vidal, Caroline Kulcsar, Henri-François Raynaud, Nicolas Galland, Markus Kasper, Julien Milli, David Mouillet, Laura Schreiber, Emiliano Diolaiti, Raffaele Gratton, Gael Chauvin

Proceedings Volume 13097, 130977Z (2024) https://doi.org/10.1117/12.3020179

KEYWORDS: Adaptive optics, Vibration, Signal to noise ratio, Wavefront sensors, Tunable filters, Wavefronts, Wind speed

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Proceedings Article | 27 August 2024 Presentation + Paper

Presentation + Paper

Upgrading SPHERE with the second stage AO system SAXO+: first performance results of a data-driven predictive minimum-variance control strategy

Nicolas Galland, Henri-François Raynaud, Markus Kasper, Charles Goulas, Clémentine Béchet, Florian Ferreira, Michel Tallon, Fabrice Vidal, Maud Langlois, Anthony Boccaletti, Gaël Chauvin, Emiliano Diolaiti, Raffaele Gratton, Magali Loupias, Julien Milli, François Wildi, Caroline Kulcsár

Proceedings Volume 13097, 1309711 (2024) https://doi.org/10.1117/12.3020097

KEYWORDS: Adaptive optics, Device simulation, Control systems, Data modeling, Stochastic processes

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

Upgrading SPHERE with the second stage AO system SAXO+: non-common path aberrations estimation and correction

Johan Mazoyer, Charles Goulas, Fabrice Vidal, Isaac Bernardino Dinis, Julien Milli, Michel Tallon, Raphaël Galicher, Olivier Absil, Clémentine Bechet, Anthony Boccaletti, Florian Ferreira, Maud Langlois, Patrice Martinez, Laurent Mugnier, Mamadou N'diaye, Gilles Orban de Xivry, Axel Potier, Isabelle Tallon-Bosc, Arthur Vigan

Proceedings Volume 13096, 130969D (2024) https://doi.org/10.1117/12.3019921

KEYWORDS: Coronagraphy, Wavefront sensors, Adaptive optics

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

Towards higher resolution profiling using filtered laser-based adaptive optics telemetry

Clémentine Béchet

Proceedings Volume 12185, 121851O (2022) https://doi.org/10.1117/12.2630488

KEYWORDS: Optical filters, Profiling, Turbulence, Data modeling, Adaptive optics, Wavefront sensors, Atmospheric optics, Fourier transforms, Telescopes

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Proceedings Article | 29 August 2022 Paper

Paper

Accurate metrology for focal plane astronomical instruments

L. Vanzi, C. Bechet, M. Flores, A. Zapata, M. Parra, T. Shen, R. Dunner, M. Castro

Proceedings Volume 12188, 121883Y (2022) https://doi.org/10.1117/12.2629684

KEYWORDS: Calibration, Cameras, Metrology, Distortion, 3D acquisition, Imaging systems, Photogrammetry, Optical fibers, Machine vision, Computer vision technology

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Upgrading the high contrast imaging facility SPHERE: science drivers and instrument choices

A. Boccaletti, G. Chauvin, F. Wildi, J. Milli, E. Stadler, E. Diolaiti, R. Gratton, F. Vidal, M. Loupias, M. Langlois, F. Cantalloube, M. N’Diaye, D. Gratadour, F. Ferreira, M. Tallon, J. Mazoyer, D. Segransan, D. Mouillet, J.-L. Beuzit, M. Bonnefoy, R. Galicher, A. Vigan, I. Snellen, M. Feldt, S. Desidera, S. Rousseau, A. Baruffolo, C. Goulas, P. Baudoz, C. Bechet, M. Benisty, A. Bianco, B. Carry, E. Cascone, B. Charnay, E. Choquet, V. Christiaens, F. Cortecchia, V. Di Capprio, A. De Rosa, C. Desgrange, V. D'Orazi, S. Douté, M. Frangiamore, E. Gendron, C. Ginski, E. Huby, C. Keller, C. Kulcsár, R. Landman, S. Lagarde, E. Lagadec, A.-M. Lagrange, M. Lombini, M. Kasper, F. Ménard, Y. Magnard, G. Malaguti, D. Maurel, D. Mesa, G. Morgante, E. Pantin, T. Pichon, A. Potier, P. Rabou, S. Rochat, l. Terenzi, E. Thiébaut, I. Tallon-Bosc, H.-F Raynaud, D. Rouan, A. Sevin, F. Schiavone, L. Schrieber, A. Zanutta

Proceedings Volume 12184, 121841S (2022) https://doi.org/10.1117/12.2630154

KEYWORDS: Optical spheres, Planets, Exoplanets, Astronomy, Astrophysics, Spectral resolution, Adaptive optics, Stars, Wavefront sensors, Coronagraphy

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Proceedings Article | 26 August 2022 Paper

Paper

VERMILION: Visitor Extension spectRal sub-Mid-Infrared Light InterferOmeter iNstrument

Massinissa Hadjara, Romain Petrov, Stéphane Lagarde, Xinyang Chen, Jinhua He, Lei Zhu, Bruno Lopez, Florentin Millour, Anthony Meilland, Alexandre Gallenne, James Leftley, Abdelkarim Boskri, Juncheng Chen, Ernest Michael, Marcos Diaz, Rene Mendez, Amelia Bayo, Miguel Piña, Gabriel Pereira, Sebastián Manosalva, Christian Nitschelm, Juan Pablo Colque, Congcong Zhang, Dan Zhou, Fatmé Allouche, Yinlei Hao, Amokrane Berdja, Felipe Besser, Clémentine Marie Zélia Bechet, Andrés Guesalaga Meissner, Leonardo Vanzi, Abderrahmane Mezaoui, Nourredine Moussaoui

Proceedings Volume 12183, 121831V (2022) https://doi.org/10.1117/12.2627736

KEYWORDS: Stars, Spectral resolution, Astatine, Telescopes, Sensors, Adaptive optics, Spatial resolution, Observatories, K band, Interferometry

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Proceedings Article | 18 July 2018 Presentation + Paper

Presentation + Paper

Innovative real-time processing for solar adaptive optics

Éric Thiébaut, Michel Tallon, Loïc Denis, Maud Langlois, Clémentine Béchet, Gil Moretto, Bernard Gelly

Proceedings Volume 10703, 107031I (2018) https://doi.org/10.1117/12.2313776

KEYWORDS: Adaptive optics, Wavefront sensors, Linear filtering, Deformable mirrors, Wavefronts, Scintillation, Data modeling, Image resolution, Actuators, Control systems

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Proceedings Article | 13 July 2018 Presentation + Paper

Presentation + Paper

Rising MOONS: an update on the VLT’s next multi-object spectrograph as it begins to grow

William Taylor, Michele Cirasuolo, Jose Afonso, Marcella Carollo, Chris Evans, Hector Flores, Roberto Maiolino, Stephane Paltani, Leonardo Vanzi, Manuel Abreu, Jean-Phillipe Amans, David Atkinson, Joe Barrett, Steven Beard, Celementine Béchet, Martin Black, David Boettger, Saskia Brierley, David Buscher, Alexandre Cabral, William Cochrane, João Coelho, Miriam Colling, Ralf Conzelmann, Francesco Dalessio, Louise Dauvin, George Davidson, Holger Drass, Rolando Dünner, Alasdair Fairley, Giles Fasola, Debora Ferruzzi, Martin Fisher, Mauricio Flores, Bianca Garilli, Julien Gaudemard, Oscar Gonzalez, Isabelle Guinouard, Pablo Gutierrez, Peter Hammersley, Régis Haigron, Chris Haniff, Mahmoud Hayati, Derek Ives, Olaf Iwert, Philippe Laporte, David Lee, Gianluca Li Causi, Yerko Luco, Alastair Macleod, Vincenzo Mainieri, Charles Maire, Basile-Thierry Melse, Johannes Nix, Ernesto Oliva, António Oliveira, Livia Origlia, Ian Parry, Fernando Pedichini, Roberto Piazzesi, Phil Rees, Florent Reix, Myriam Rodrigues, Felipe Rojas, Stefano Rota, Frédéric Royer, Pedro Santos, Robin Schnell, Tzu-Chiang Shen, Michael Sordet, Jonathan Strachan, Xiaowei Sun, Graham Tait, Miguel Torres, Andre Tozzi, Simon Tulloch, Álvaro Valenzuela Navarro, Lauren Von Dran, Chris Waring, Stephen Watson, Brian Woodward, Yanbin Yang

Proceedings Volume 10702, 107021G (2018) https://doi.org/10.1117/12.2313403

KEYWORDS: Cameras, Optical fibers, Telescopes, Sensors, Metrology, Calibration, Spectrographs, Galactic astronomy, Astronomical imaging, Stars

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Proceedings Article | 10 July 2018 Paper

Paper

Overview of multi-conjugate adaptive optics reconstructors

Clémentine Béchet

Proceedings Volume 10703, 107031B (2018) https://doi.org/10.1117/12.2314397

KEYWORDS: Adaptive optics, Wavefronts, Tomography, Stars, Filtering (signal processing), Systems modeling, Turbulence, Wavefront distortions, Wavefront sensors, Reconstruction algorithms

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Proceedings Article | 9 August 2016 Paper

Paper

Implementation and performance of the metrology system for the multi-object optical and near-infrared spectrograph MOONS

Holger Drass, Leonardo Vanzi, Miguel Torres-Torriti, Rolando Dünner , Tzu-Chiang Shen, Francisco Belmar, Lousie Dauvin, Tomás Staig, Jonathan Antognini, Mauricio Flores, Yerko Luco, Clémentine Béchet, David Boettger, Steven Beard, David Montgomery, Stephen Watson, Alexandre Cabral, Mahmoud Hayati, Manuel Abreu, Phil Rees, Michele Cirasuolo, William Taylor, Alasdair Fairley

Proceedings Volume 9908, 99088E (2016) https://doi.org/10.1117/12.2232654

KEYWORDS: Metrology, Spectrographs, Cameras, Astronomical imaging, Time metrology, Calibration, Electroluminescent displays, Target detection, Staring arrays, Telescopes

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Proceedings Article | 27 July 2016 Paper

Paper

Laser beam shaping simulations for generation of artificial stars constellations

Héctor González-Núñez, Clémentine Béchet, Andrés Guesalaga

Proceedings Volume 9909, 99095K (2016) https://doi.org/10.1117/12.2232001

KEYWORDS: Adaptive optics, Deformable mirrors, Telescopes, Actuators, Sodium, Electroluminescent displays, Computer simulations, Optical simulations, Stars, Algorithm development

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Proceedings Article | 22 August 2014 Paper

Paper

Statistics of atmospheric turbulence at Cerro Pachon using the GeMS profiler

Ignacio Rodriguez, Benoit Neichel, Clémentine Béchet, Dani Guzmán, Andrés Guesalaga

Proceedings Volume 9148, 914866 (2014) https://doi.org/10.1117/12.2056665

KEYWORDS: Turbulence, Adaptive optics, Atmospheric turbulence, Telescopes, Gemini Observatory, Deconvolution, Profiling, Stars, Matrices, Statistical analysis

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Proceedings Article | 7 August 2014 Paper

Paper

Laboratory validation of a laser shaping system before guide star projection

Sebastián Zúñiga, Clémentine Béchet, Héctor González-Núñez, Benoit Neichel, Vincent Fesquet, Vincent Garrel, Pedro Escárate, Mario Castro, Dani Guzmán, Andrés Guesalaga

Proceedings Volume 9148, 91483I (2014) https://doi.org/10.1117/12.2056062

KEYWORDS: Actuators, Electroluminescent displays, Adaptive optics, Deformable mirrors, Calibration, Stars, Wavefront sensors, Mirrors, Laser guide stars, Microelectromechanical systems

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Proceedings Article | 4 August 2014 Paper

Paper

Towards a reliability assessment of the CN2 and wind speed vertical profiles retrieved from GeMS

Benoît Neichel, Elena Masciadri, Andres Guesalaga, Franck Lascaux, Clémentine Béchet

Proceedings Volume 9148, 914863 (2014) https://doi.org/10.1117/12.2056131

KEYWORDS: Adaptive optics, Turbulence, Atmospheric modeling, Tomography, Stars, Wind measurement, Telescopes, Astronomy, Reliability, 3D modeling

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Proceedings Article | 4 August 2014 Paper

Paper

Modeling the effect of high altitude turbulence in wide-field correlating wavefront sensing and its impact on the performance of solar AO systems

I. Montilla, M. Tallon, M. Langlois, C. Béchet, M. Collados Vera

Proceedings Volume 9148, 91486D (2014) https://doi.org/10.1117/12.2054952

KEYWORDS: Adaptive optics, Telescopes, Turbulence, Wavefront sensors, Solar telescopes, Error analysis, Systems modeling, Wavefronts, Device simulation, Atmospheric modeling

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Proceedings Article | 21 July 2014 Paper

Paper

Turbulence profiling methods applied to ESO's adaptive optics facility

Javier Valenzuela, Clémentine Béchet, Aurea Garcia-Rissmann, Frédéric Gonté, Johann Kolb, Miska Le Louarn, Benoît Neichel, Pierre-Yves Madec, Andrés Guesalaga

Proceedings Volume 9148, 91481X (2014) https://doi.org/10.1117/12.2054740

KEYWORDS: Adaptive optics, Turbulence, Wavefront sensors, Stars, Error analysis, Telescopes, Photons, Deconvolution, Statistical analysis, Gemini Observatory

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Proceedings Article | 13 September 2012 Paper

Paper

Multi-conjugate AO for the European Solar Telescope

I. Montilla, C. Béchet, M. Le Louarn, M. Tallon, J. Sánchez-Capuchino, M. Collados Vera

Proceedings Volume 8447, 84475H (2012) https://doi.org/10.1117/12.925744

KEYWORDS: Adaptive optics, Solar telescopes, Electroluminescent displays, Mirrors, Reconstruction algorithms, Sensors, Fourier transforms, Computer simulations, Deformable mirrors, Fractal analysis

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Proceedings Article | 13 September 2012 Paper

Paper

Optimal projection of reconstructed layers onto deformable mirrors with fractal iterative method for AO tomography

E. Brunner, Cl. Béchet, M. Tallon

Proceedings Volume 8447, 84475I (2012) https://doi.org/10.1117/12.926809

KEYWORDS: Adaptive optics, Deformable mirrors, Tomography, Wavefronts, Projection systems, Reconstruction algorithms, Algorithm development, Wave propagation, Actuators, Telescopes

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Proceedings Article | 13 September 2012 Paper

Paper

Optimization of adaptive optics correction during observations: algorithms and system parameters identification in closed-loop

Clémentine Béchet, Michel Tallon, Éric Thiébaut

Proceedings Volume 8447, 84472C (2012) https://doi.org/10.1117/12.926574

KEYWORDS: Adaptive optics, Wavefront sensors, Cesium, Turbulence, Telescopes, Calibration, Cerium, Stars, System identification, Large telescopes

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Proceedings Article | 13 September 2012 Paper

Paper

Calibration strategy of the AOF

J. Kolb, P.-Y. Madec, M. Le Louarn, N. Muller, C. Béchet

Proceedings Volume 8447, 84472D (2012) https://doi.org/10.1117/12.926369

KEYWORDS: Adaptive optics, Sensors, Calibration, Telescopes, Iterated function systems, Chemical elements, Actuators, Point spread functions, Deformable mirrors, Optical components

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Proceedings Article | 13 September 2012 Paper

Paper

ESO adaptive optics facility progress report

Robin Arsenault, Pierre-Yves Madec, Jerome Paufique, Paolo La Penna, Stefan Stroebele, Elise Vernet, Jean-Francois Pirard, Wolfgang Hackenberg, Harald Kuntschner, Lieselotte Jochum, Johann Kolb, Nicolas Muller, Miska Le Louarn, Paola Amico, Norbert Hubin, Jean-Louis Lizon, Rob Ridings, Jose Abad, Gert Fischer, Volker Heinz, Mario Kiekebusch, Javier Argomedo, Ralf Conzelmann, Sebastien Tordo, Robert Donaldson, Christian Soenke, Philippe Duhoux, Enrico Fedrigo, Bernard Delabre, Andreas Jost, Michel Duchateau, Mark Downing, Javier Moreno, Reinhold Dorn, Antonio Manescau, Domenico Bonaccini Calia, Marco Quattri, Christophe Dupuy, Ivan Guidolin, Mauro Comin, Ronald Guzman, Bernard Buzzoni, Jutta Quentin, Steffan Lewis, Paul Jolley, Maximilian Kraus, Thomas Pfrommer, Roberto Biasi, Daniele Gallieni, Clementine Bechet, Remko Stuik

Proceedings Volume 8447, 84470J (2012) https://doi.org/10.1117/12.926074

KEYWORDS: Telescopes, Adaptive optics, Mirrors, Space telescopes, Wavefront sensors, Sensors, Optics manufacturing, Actuators, Control systems, Interfaces

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Proceedings Article | 13 September 2012 Paper

Paper

Simulations of adaptive optics systems for the E-ELT

M. Le Louarn, Richard Clare, Clémentine Béchet, Michel Tallon

Proceedings Volume 8447, 84475D (2012) https://doi.org/10.1117/12.925128

KEYWORDS: Adaptive optics, Device simulation, Computer simulations, Stars, Tomography, Telescopes, Atmospheric modeling, Optical simulations, Laser guide stars, Mirrors

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Proceedings Article | 28 July 2010 Paper

Paper

Fractal iterative method for fast atmospheric tomography on extremely large telescopes

Michel Tallon, Isabelle Tallon-Bosc, Clémentine Béchet, Fabien Momey, Marie Fradin, Éric Thiébaut

Proceedings Volume 7736, 77360X (2010) https://doi.org/10.1117/12.858042

KEYWORDS: Tomography, Wavefronts, Adaptive optics, Wavefront sensors, Turbulence, Stars, Fractal analysis, Iterative methods, Error analysis, Large telescopes

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Proceedings Article | 28 July 2010 Paper

Paper

Manufacturing of the ESO adaptive optics facility

R, Arsenault, P.-Y. Madec, N. Hubin, S. Stroebele, J. Paufique, E. Vernet, W. Hackenberg, J.-F. Pirard, L. Jochum, A. Glindemann, A. Jost, R. Conzelmann, M. Kiekebusch, S. Tordo, J.-L. Lizon, R. Donaldson, E. Fedrigo, C. Soenke, M. Duchateau, A. Bruton, B. Delabre, M. Downing, J. Reyes, J. Kolb, C. Bechet, M. Lelouarn, D. Bonaccini Calia, M. Quattri, I. Guidolin, B. Buzzoni, C. Dupuy, R. Guzman, M. Comin, A. Silber, J. Quentin, P. La Penna, A. Manescau, P. Jolley, V. Heinz, P. Duhoux, J. Argomedo, D. Gallieni, P. Lazzarini, R. Biasi, M. Andrighettoni, G. Angerer, D. Pescoller, R, Stuik, A. Deep

Proceedings Volume 7736, 77360L (2010) https://doi.org/10.1117/12.857973

KEYWORDS: Telescopes, Adaptive optics, Mirrors, Laser guide stars, Sensors, Optics manufacturing, Real-time computing, Manufacturing, Actuators, Cameras

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

LITpro: a model fitting software for optical interferometry

I. Tallon-Bosc, M. Tallon, E. Thiébaut, C. Béchet, G. Mella, S. Lafrasse, O. Chesneau, A. Domiciano de Souza, G. Duvert, D. Mourard, R. Petrov, M. Vannier

Proceedings Volume 7013, 70131J (2008) https://doi.org/10.1117/12.788871

KEYWORDS: Data modeling, Interferometry, Visibility, Optical interferometry, Java, Surface conduction electron emitter displays, Photometry, Fourier transforms, Stars, Human-machine interfaces

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Proceedings Article | 16 July 2008 Paper

Paper

Reduced wavefront reconstruction mean square error using optimal priors: algebraic analysis and simulations

C. Béchet, M. Tallon, E. Thiébaut

Proceedings Volume 7015, 70153H (2008) https://doi.org/10.1117/12.790293

KEYWORDS: Wavefronts, Signal to noise ratio, Adaptive optics, Error analysis, Wavefront reconstruction, Reconstruction algorithms, Wave propagation, Turbulence, Wavefront sensors, Fractal analysis

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Proceedings Article | 7 July 2008 Paper

Paper

Shack-Hartmann wavefront reconstruction with elongated sodium laser guide stars: improvements with priors and noise correlations

Michel Tallon, Isabelle Tallon-Bosc, Clémentine Béchet, Eric Thiébaut

Proceedings Volume 7015, 70151N (2008) https://doi.org/10.1117/12.788902

KEYWORDS: Sodium, Wavefront sensors, Wavefronts, Wavefront reconstruction, Telescopes, Adaptive optics, Laser guide stars, Reconstruction algorithms, Large telescopes, Data modeling

Read Abstract +

Proceedings Article | 7 July 2008 Paper

Paper

Performances of the fractal iterative method with an internal model control law on the ESO end-to-end ELT adaptive optics simulator

C. Béchet, M. Le Louarn, M. Tallon, É. Thiébaut

Proceedings Volume 7015, 70151H (2008) https://doi.org/10.1117/12.788805

KEYWORDS: Adaptive optics, Data modeling, Turbulence, Error analysis, Monte Carlo methods, K band, Computer simulations, Iterative methods, Fractal analysis, Wavefronts

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Proceedings Article | 28 June 2006 Paper

Paper

FRIM: minimum-variance reconstructor with a fractal iterative method

Clémentine Béchet, Michel Tallon, Eric Thiébaut

Proceedings Volume 6272, 62722U (2006) https://doi.org/10.1117/12.672197

KEYWORDS: Wavefronts, Adaptive optics, Fractal analysis, Turbulence, Wavefront reconstruction, Iterative methods, Wavefront sensors, Reconstruction algorithms, Niobium, Computer simulations

Read Abstract +

Showing 5 of 31 publications

Conference Committee Involvement (4)

Adaptive Optics Systems IX

16 June 2024 | Yokohama, Japan

Adaptive Optics Systems VIII

17 July 2022 | Montréal, Québec, Canada

Adaptive Optics Systems VII

14 December 2020 | Online Only, California, United States

Adaptive Optics Systems VII

13 December 2020 | San Diego, California, United States

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