Dr. Raphaël Galicher Profile

Dr. Raphaël Galicher

Visiting Worker at LESIA

SPIE Involvement:

Author

Publications (48)

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

Read Abstract +

Proceedings Article | 23 August 2024 Paper

Paper

Polarization effects on high contrast imaging: measurements on THD2 bench

Pierre Baudoz, Celia Desgrange, Raphaël Galicher, Iva Laginja

Proceedings Volume 13092, 130926L (2024) https://doi.org/10.1117/12.3020010

KEYWORDS: Polarization, Coronagraphy, Mirrors, Reflection, Polarizers, Parabolic mirrors, Astronomical instrumentation, High dynamic range imaging, Exoplanets

Read Abstract +

Proceedings Article | 23 August 2024 Poster + Paper

Poster + Paper

Revisiting the Borde-Traub focal plane wavefront estimation technique for exoplanet direct imaging

Axel Potier, A. J. Eldorado Riggs, Garreth Ruane, Phillip Poon, Matthew Noyes, Greg Allan, Alexander Walter, Camilo Mejia Prada, Raphaël Galicher, Johan Mazoyer, Pierre Baudoz

Proceedings Volume 13092, 130926E (2024) https://doi.org/10.1117/12.3018289

KEYWORDS: Coronagraphy, Exoplanets, Wavefront sensors

Read Abstract +

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

Read Abstract +

Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

Improving VLT/SPHERE without additional hardware: comparing quasi-static correction strategies

Axel Potier, Zahed Wahhaj, Raphael Galicher, Johan Mazoyer, Pierre Baudoz, Gael Chauvin, Garreth Ruane

Proceedings Volume 12185, 1218568 (2022) https://doi.org/10.1117/12.2629926

KEYWORDS: Calibration, Speckle, Coronagraphy, Optical spheres, Modulation, Coherence imaging, Wavefront sensors, Image processing, Adaptive optics, Turbulence

Read Abstract +

Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

SAXO+ upgrade: system choices and numerical simulations

Fabrice Vidal, Charles Goulas, Raphaël Galicher, Anthony Boccaletti, Faustine Cantalloube, Éric Gendron, Arnaud Sevin, Florian Ferreira, Gaël Chauvin, Maud Langlois, Julien Milli

Proceedings Volume 12185, 121854D (2022) https://doi.org/10.1117/12.2629325

KEYWORDS: Adaptive optics, Device simulation, Real-time computing, Wavefront sensors, Optical spheres, Turbulence, Stars, Point spread functions, Computer simulations, Numerical simulations

Read Abstract +

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

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Analytical model-based analysis of long-exposure images from ground-based telescopes

Lucie Leboulleux, Raphaël Galicher, Eric Gendron, Pierre Baudoz, Gérard Rousset

Proceedings Volume 11448, 114483Z (2020) https://doi.org/10.1117/12.2562627

KEYWORDS: Model-based design, Telescopes, Adaptive optics, Atmospheric turbulence, Image quality, Device simulation, Exoplanets, Image resolution, Coronagraphy, Imaging systems

Read Abstract +

Proceedings Article | 21 August 2018 Paper

Paper

Current limitation of the THD2 bench: the scatter issue

A. Potier, P. Baudoz, R. Galicher, F. Patru, S. Thijs

Proceedings Volume 10698, 106986G (2018) https://doi.org/10.1117/12.2313986

KEYWORDS: Bidirectional reflectance transmission function, Scattering, Exoplanets, Coronagraphy

Read Abstract +

Proceedings Article | 21 August 2018 Paper

Paper

Review of high-contrast imaging systems for current and future ground- and space-based telescopes I: coronagraph design methods and optical performance metrics

G. Ruane, A. Riggs, J. Mazoyer, E. Por, M. N’Diaye, E. Huby, P. Baudoz, R. Galicher, E. Douglas, J. Knight, B. Carlomagno, K. Fogarty, L. Pueyo, N. Zimmerman, O. Absil, M. Beaulieu, E. Cady, A. Carlotti, D. Doelman, O. Guyon, S. Haffert, J. Jewell, N. Jovanovic, C. Keller, M. Kenworthy, J. Kuhn, K. Miller, D. Sirbu, F. Snik, J. Kent Wallace, M. Wilby, M. Ygouf

Proceedings Volume 10698, 106982S (2018) https://doi.org/10.1117/12.2312948

KEYWORDS: Coronagraphy, Space telescopes, Signal to noise ratio, Planets, Point spread functions, Stars, Wavefronts, Telescopes, Optical instrument design, Adaptive optics

Read Abstract +

Proceedings Article | 13 July 2018 Paper

Paper

Fast focal plane wavefront sensing on ground-based telescopes

Benjamin Gerard, Christian Marois, Raphaël Galicher, Jean-Pierre Véran

Proceedings Volume 10703, 1070351 (2018) https://doi.org/10.1117/12.2314134

KEYWORDS: Visibility, Calibration, Wavefronts, Point spread functions, Wavefront sensors, Signal to noise ratio, Modulation transfer functions, Speckle, Stars, Telescopes

Read Abstract +

Proceedings Article | 12 July 2018 Presentation + Paper

Presentation + Paper

Towards the experimental validation of the non-linear dark hole on the THD bench

Olivier Herscovici-Schiller, Laurent Mugnier, Pierre Baudoz, Raphaël Galicher, Jean-François Sauvage, Fabien Patru, Lucie Leboulleux, Arthur Vigan, Kjetil Dohlen, Thierry Fusco, Laurent Pueyo, Rémi Soummer, Jean-Michel Le Duigou

Proceedings Volume 10703, 1070329 (2018) https://doi.org/10.1117/12.2314100

KEYWORDS: Coronagraphy, Point spread functions, Deformable mirrors, Sensors, Wavefronts, Calibration, Cameras, Fourier transforms, Wavefront sensors, Spatial light modulators

Read Abstract +

Proceedings Article | 12 July 2018 Paper

Paper

In-lab testing of six-level phase mask coronagraphs onto the high-contrast imaging THD2 bench

Fabien Patru, Pierre Baudoz, Raphaël Galicher, Faouzi Boussaha, Josiane Firminy, Qing Cao, Kai Wang, Lujing Xing, Marion Bonafous, Axel Potier

Proceedings Volume 10703, 107032L (2018) https://doi.org/10.1117/12.2314152

KEYWORDS: Etching, Coronagraphy, Signal attenuation, Manufacturing, Data modeling, Exoplanets, Reactive ion etching, Optical lithography

Read Abstract +

While radial velocity and transit techniques are efficient to probe exoplanets with short orbits, the study of long-orbit planets requires direct imaging and coronagraphic techniques. However, the coronagraph must deal with planets that are 10⁴ to 10¹⁰ fainter than their hosting star at a fraction of arcsecond, requiring efficient coronagraphs at short angular separation. Phase masks proved to be a good solution in monochromatic or limited spectral bandwidth but expansion to broadband requires complex phase achromatization. Solutions use photonic crystals, subwavelength grating or liquid crystal polymers but their manufacturing remains complex. An easier solution is to use photolithography and reactive ion etching and to optimize the azimuthal phase distribution like achieved in the six-level phase mask (SLPM) coronagraph (Hou et al. 2014). We present here the laboratory results of two SLPM coronagraphs enabling high-contrast imaging in wide-band. The SLPM is split in six sectors with three different depths producing three levels of optical path difference and yielding to uniform phase shifts of 0, π or 2π at the specified wavelength. Using six sectors instead of four sectors enables to mitigate the chromatic effects of the SLPM compared to the FQPM (Four-Quadrant Phase Mask) while keeping the manufacturing easy. Following theoretical developments achieved by University of Shanghai and based on our previous experience to fabricate FQPM components, we have manufactured SLPM components by reactive ion etching at Paris Observatory and we have tested it onto the THD2 facility at LESIA. The THD2 bench was built to study and compare high-contrast imaging techniques in the context of exoplanet imaging. The bench allows reducing the starlight below a 10⁻⁸ contrast level in visible/near-infrared. In this paper, we show that the SLPM is easy to fabricate at low cost and is easy to implement with a unique focal plane mask and no need of pupil apodization. Detection of a planet can be achieved at small inner working angle down to 1 λ/D. The on-axis attenuation of the best SLPM component reaches 2 × 10⁻⁵ at λ = 800 nm and is better than 10⁻⁴ in intensity over a 10% spectral bandwidth. Along the diagonal transition, we show that the off-axis transmission is attenuated by less than 3% over a 10% bandwidth and will need to be calibrated. Any etching imperfections can affect the SLPM performance, by lowering the on-axis attenuation and by changing the optimal wavelength. Despite few nanometers of uncertainty for etching the depths, we show that this first component can provide a high-contrast attenuation in laboratory

Proceedings Article | 11 July 2018 Paper

Paper

Effect of multiple deformable mirrors in broadband high-contrast coronagraphs

Chris de Jonge, Pierre Baudoz, Raphaël Galicher, Robert Huisman, Reynier Peletier, Bayu Jayawardhana

Proceedings Volume 10703, 107035D (2018) https://doi.org/10.1117/12.2313677

KEYWORDS: Deformable mirrors, Coronagraphy, Phase measurement, Speckle, Exoplanets

Read Abstract +

Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Review of high-contrast imaging systems for current and future ground-based and space-based telescopes III: technology opportunities and pathways

Frans Snik, Olivier Absil, Pierre Baudoz, Mathilde Beaulieu, Eduardo Bendek, Eric Cady, Brunella Carlomagno, Alexis Carlotti, Nick Cvetojevic, David Doelman, Kevin Fogarty, Raphaël Galicher, Olivier Guyon, Sebastiaan Haffert, Elsa Huby, Jeffrey Jewell, Nemanja Jovanovic, Christoph Keller, Matthew Kenworthy, Justin Knight, Jonas Kuhn, Johan Mazoyer, Kelsey Miller, Mamadou N'Diaye, Barnaby Norris, Emiel Por, Laurent Pueyo, A. J. Eldorado Riggs, Garreth Ruane, Dan Sirbu, J. Kent Wallace, Michael Wilby, Marie Ygouf

Proceedings Volume 10706, 107062L (2018) https://doi.org/10.1117/12.2313957

KEYWORDS: Coronagraphy, Space telescopes, Imaging systems, Exoplanets, Telescopes, Point spread functions, Liquid crystals, Adaptive optics, Wavefront sensors

Read Abstract +

Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Review of high-contrast imaging systems for current and future ground-based and space-based telescopes: Part II. Common path wavefront sensing/control and coherent differential imaging

Nemanja Jovanovic, Olivier Absil , Pierre Baudoz, Mathilde Beaulieu, Michael Bottom, Eric Cady, Brunella Carlomagno, Alexis Carlotti, David Doelman, Kevin Fogarty, Raphaël Galicher, Olivier Guyon, Sebastiaan Haffert, Elsa Huby, Jeffrey Jewell, Christoph Keller, Matthew Kenworthy, Justin Knight, Jonas Kühn, Kelsey Miller, Johan Mazoyer, Mamadou N'Diaye, Emiel Por, Laurent Pueyo, A. Riggs, Garreth Ruane, Dan Sirbu, Frans Snik, J. Wallace, Michael Wilby, Marie Ygouf

Proceedings Volume 10703, 107031U (2018) https://doi.org/10.1117/12.2314260

KEYWORDS: Exoplanets, Coronagraphy, Wavefronts, Speckle, Wavefront sensors, Point spread functions, Imaging systems, Cameras, Modulation, Coherence imaging, Phase retrieval

Read Abstract +

Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Optimization and performance of multi-deformable mirror correction on the THD2 bench

Pierre Baudoz, Raphaël Galicher, Axel Potier, Olivier Dupuis, Simone Thijs, Fabien Patru

Proceedings Volume 10706, 107062O (2018) https://doi.org/10.1117/12.2314089

KEYWORDS: Coronagraphy, Mirrors, Deformable mirrors, Actuators, Spatial frequencies, Cameras, Planets

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Prototype of S4EI (spectral sampling with slicer for stellar and extragalactical instrumentation): a new generation 3D Spectro-imager

F. Sayède, M. Puech, P. Mein, R. Galicher, J.-M. Malherbe, J.-P. AMANS

Proceedings Volume 10702, 1070254 (2018) https://doi.org/10.1117/12.2313205

KEYWORDS: Spectrographs, Spectral resolution, Telescopes, Spatial resolution, Galactic astronomy, Imaging systems, Collimators

Read Abstract +

S4EI (Spectral Sampling with Slicer for Stellar and Extragalactical Instrumentation) is a new concept for extending Multichannel Subtractive Double Pass (ie S4I - Spectral Sampling with Slicer for Solar Instrumentation) to night-time astronomy. The Multichannel Subtractive Double Pass (MSDP) spectrographs have been widely used in solar spectroscopy because of their ability to provide an excellent compromise between field of view and the spatial and spectral resolutions. Compared with other spectrographs, MSDP can deliver simultaneous monochromatic images without any time-scanning requirements (as the standard Fabry-Perot), with limited loss of flux. Spatial resolution is the same as for an Imager given by the telescope: it can be very high. It is based on new generation reflecting plane image slicers working with large apertures specific to night-time telescopes. The resulting design could be potentially very attractive and innovative for different domains of astronomy, e.g., the simultaneous spatial mapping of accurately flux-calibrated emission lines between OH sky lines in extragalactic astronomy or the simultaneous imaging of stars, exoplanets and interstellar medium. The determination of physical and chemical properties of galaxies needs to observe several emission lines at different wavelengths. The combination of these lines gives access to the distribution in dust, star formation rate, metallicity, the kinematics or even to the electron density of the gas in the galaxies. The spatial resolution of MSDP allows, like the 3D or integral field spectrographs the construction of spatial distribution maps. The advantage of S4EI is that by measuring simultaneously the different lines, the relative errors of the flux calibration between the different wavelengths of the lines are potentially limited by the uncertainty of the calibration source used, which is expected to significantly reduce the associated errors and thus increase the precision and accuracy of estimates.

Proceedings Article | 29 July 2016 Paper

Paper

Coronagraphic wavefront sensing with COFFEE: high spatial-frequency diversity and other news

L. Mugnier, J.-F. Sauvage, O. Herscovici-Schiller, P. Baudoz, R. Galicher, J.-M. Le Duigou

Proceedings Volume 9904, 99043A (2016) https://doi.org/10.1117/12.2233726

KEYWORDS: Wavefront sensors, Exoplanetary science, Sensors, Optical aberrations, Coronagraphy, Optical fiber cables, Imaging systems, Calibration, Mirrors, Error analysis

Read Abstract +

Proceedings Article | 27 July 2016 Paper

Paper

Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images

J. Milli, T. Banas, D. Mouillet, D. Mawet, J. Girard, A. Vigan, A. Boccaletti, M. Kasper, Zahed Wahhaj, A. M. Lagrange, J.-L. Beuzit, T. Fusco, J.-F. Sauvage, R. Galicher

Proceedings Volume 9909, 99094Z (2016) https://doi.org/10.1117/12.2231703

KEYWORDS: Adaptive optics, Speckle, Optical spheres, Point spread functions, Adaptive optics, Optical spheres, Coronagraphy, Sensors, Stars, Telescopes, Lamps, Camera shutters

Read Abstract +

Proceedings Article | 22 July 2016 Paper

Paper

Development and characterization of Four-Quadrant Phase Mask coronagraph (FQPM)

M. Bonafous, R. Galicher, P. Baudoz, J. Firminy, F. Boussaha

Proceedings Volume 9912, 99126J (2016) https://doi.org/10.1117/12.2234497

KEYWORDS: Exoplanets, Coronagraphy, Photomasks, Point spread functions, Optical lithography, Lithography, Photoresist materials, Control systems, Optical microscopes, Scanning electron microscopy

Read Abstract +

Proceedings Article | 28 August 2014 Paper

Paper

MAPLE: reflected light from exoplanets with a 50-cm diameter stratospheric balloon telescope

Christian Marois, Colin Bradley, John Pazder, Reston Nash, Stanimir Metchev, Frédéric Grandmont, Anne-Lise Maire, Ruslan Belikov, Bruce Macintosh, Thayne Currie, Raphaël Galicher, Franck Marchis, Dimitri Mawet, Eugene Serabyn, Eric Steinbring

Proceedings Volume 9143, 91432R (2014) https://doi.org/10.1117/12.2056747

KEYWORDS: Planets, Telescopes, Stars, Space telescopes, Exoplanets, Adaptive optics, Electron multiplying charge coupled devices, Optical design, Mirrors, Coronagraphy

Read Abstract +

Proceedings Article | 28 August 2014 Paper

Paper

High contrast imaging on the THD bench: progress and upgrades

R. Galicher, P. Baudoz, J. R. Delorme, J. Mazoyer, G. Rousset, J. Firminy, F. Boussaha, M. N'Diaye, K. Dohlen, A. Caillat

Proceedings Volume 9143, 91435A (2014) https://doi.org/10.1117/12.2055902

KEYWORDS: Coronagraphy, Deformable mirrors, Stars, Exoplanets, Cameras, Wavefront sensors, Mirrors, Prototyping, Colorimetry, Speckle

Read Abstract +

Proceedings Article | 7 August 2014 Paper

Paper

A measurement of the systematic astrometric error in GeMS and the short-term astrometric precision in ShaneAO

S. Ammons, Benoit Neichel, Jessica Lu, Donald Gavel, Srikar Srinath, Rosalie McGurk, Alex Rudy, Connie Rockosi, Christian Marois, Bruce Macintosh, Dmitry Savransky, Raphael Galicher, Eduardo Bendek, Olivier Guyon, Eduardo Marin, Vincent Garrel, Gaetano Sivo

Proceedings Volume 9148, 91481J (2014) https://doi.org/10.1117/12.2057233

KEYWORDS: Stars, Distortion, Adaptive optics, Point spread functions, Planets, Error analysis, Exoplanets, Imaging systems, Observatories, Imaging spectroscopy

Read Abstract +

Proceedings Article | 28 July 2014 Paper

Paper

High-contrast imaging in wide spectral band with a self-coherent camera and achromatic coronagraphs

J. Delorme, R. Galicher, P. Baudoz, G. Rousset, J. Mazoyer, M. N'Diaye, K. Dohlen, A. Caillat

Proceedings Volume 9151, 91515Q (2014) https://doi.org/10.1117/12.2056846

KEYWORDS: Coronagraphy, Prototyping, Cameras, Wavefront sensors, Adaptive optics, Speckle, Space telescopes, Exoplanets, Stars, Modulation

Read Abstract +

Proceedings Article | 28 July 2014 Paper

Paper

The high contrast imaging modes of MICADO

Pierre Baudoz, Anthony Boccaletti, Sylvestre Lacour, Raphaël Galicher, Yann Clénet, Damien Gratadour, Éric Gendron, Tristan Buey, Gérard Rousset, Michael Hartl, Richard Davies

Proceedings Volume 9147, 91479E (2014) https://doi.org/10.1117/12.2057010

KEYWORDS: Coronagraphy, Planets, Stars, Adaptive optics, Exoplanets, Optical spheres, Telescopes, Point spread functions, Imaging systems, Device simulation

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

Gemini planet imager observational calibrations II: detector performance and calibration

Patrick Ingraham, Marshall Perrin, Naru Sadakuni, Jean-Baptiste Ruffio, Jérôme Maire, Jeff Chilcote, James Larkin, Franck Marchis, Raphael Galicher, Jason Weiss

Proceedings Volume 9147, 91477O (2014) https://doi.org/10.1117/12.2057437

KEYWORDS: Sensors, Gemini Planet Imager, Calibration, Electroluminescent displays, Electrons, Gemini Observatory, Iterated function systems, Point spread functions, Signal to noise ratio, Data modeling

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

Overview of the MICADO SCAO system

Yann Clénet, Tristan Buey, Gérard Rousset, Mathieu Cohen, Philippe Feautrier, Eric Gendron, Zoltan Hubert, Fanny Chemla, Damien Gratadour, Pierre Baudoz, Sylvestre Lacour, Anthony Boccaletti, Arnaud Sevin, Fabrice Vidal, Raphaël Galicher, Denis Perret, Bertrand Le Ruyet, Frédéric Chapron, Eric Stadler, Patrick Rabou, Laurent Jocou, Sylvain Rochat, Gaël Chauvin, Richard Davies

Proceedings Volume 9148, 91480Z (2014) https://doi.org/10.1117/12.2055220

KEYWORDS: Adaptive optics, Coronagraphy, Point spread functions, Relays, Cameras, Telescopes, Device simulation, Mirrors, Real-time computing, Wavefront sensors

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

Deformable mirror interferometric analysis for the direct imagery of exoplanets

Johan Mazoyer, Raphaël Galicher, Pierre Baudoz, Patrick Lanzoni, Frédéric Zamkotsian, Gérard Rousset

Proceedings Volume 9148, 914846 (2014) https://doi.org/10.1117/12.2057833

KEYWORDS: Actuators, Interferometry, Deformable mirrors, Mirrors, Coronagraphy, Photovoltaics, Digital signal processing, Exoplanets, Adaptive optics, Phase measurement

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging

Christian Marois, Carlos Correia, Raphael Galicher, Patrick Ingraham, Bruce Macintosh, Thayne Currie, Rob De Rosa

Proceedings Volume 9148, 91480U (2014) https://doi.org/10.1117/12.2055245

KEYWORDS: Planets, Point spread functions, Gemini Planet Imager, Speckle, Signal to noise ratio, Contamination, Algorithm development, Stars, Photonic integrated circuits, Methane

Read Abstract +

Proceedings Article | 14 July 2014 Paper

Paper

An aperture masking mode for the MICADO instrument

S. Lacour, P. Baudoz, E. Gendron, A. Boccaletti, R. Galicher, Y. Clénet, D. Gratadour, T. Buey, G. Rousset, M. Hartl, R. Davies

Proceedings Volume 9147, 91479F (2014) https://doi.org/10.1117/12.2057070

KEYWORDS: Spatial frequencies, Adaptive optics, Cameras, Telescopes, Optical transfer functions, Astronomy, K band, Image segmentation, Fourier transforms, Electroluminescent displays

Read Abstract +

Proceedings Article | 8 July 2014 Paper

Paper

S4EI (Spectral Sampling with Slicer for Stellar and Extragalactical Instrumentation), a new-generation of 3D spectro-imager dedicated to night astronomy

Frédéric Sayède, Mathieu Puech, Pierre Mein, Piercarlo Bonifacio, Jean-Marie Malherbe, Raphaël Galicher, Jean-Philippe Amans, Gilles Fasola

Proceedings Volume 9147, 91473O (2014) https://doi.org/10.1117/12.2055121

KEYWORDS: Spectral resolution, Spectrographs, Stars, Galactic astronomy, Mirrors, Telescopes, Astronomy, Sensors, Extragalactic astronomy, Exoplanets

Read Abstract +

Proceedings Article | 26 September 2013 Paper

Paper

Speckle correction in polychromatic light with the self-coherent camera for the direct detection of exoplanets

J. Mazoyer, R. Galicher, P. Baudoz, G. Rousset

Proceedings Volume 8864, 88640N (2013) https://doi.org/10.1117/12.2023508

KEYWORDS: Coronagraphy, Exoplanets, Fourier transforms, Planets, Cameras, Stars, Actuators, Point spread functions, Autoregressive models, Speckle

Read Abstract +

Proceedings Article | 26 September 2013 Paper

Paper

High-contrast imaging with a self-coherent camera

Raphaël Galicher, Johan Mazoyer, Pierre Baudoz, Gérard Rousset

Proceedings Volume 8864, 88640M (2013) https://doi.org/10.1117/12.2025298

KEYWORDS: Deformable mirrors, Cameras, Coronagraphy, Planets, Modulation, Speckle, Stars, Exoplanets, Calibration, Photomasks

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Paper

Test results for the Gemini Planet Imager data reduction pipeline

Jérôme Maire, Marshall Perrin, René Doyon, Jeffrey Chilcote, James Larkin, Jason Weiss, Christian Marois, Quinn Konopacky, Maxwell Millar-Blanchaer, James Graham, Jennifer Dunn, Raphael Galicher, Franck Marchis, Sloane Wiktorowicz, Kathleen Labrie, Sandrine Thomas, Stephen Goodsell, Fredrik Rantakyro, David Palmer, Bruce Macintosh

Proceedings Volume 8451, 84513G (2012) https://doi.org/10.1117/12.926202

KEYWORDS: Gemini Planet Imager, Calibration, Gemini Observatory, Polarimetry, Speckle, Databases, Signal attenuation, Planets, Stars, Exoplanets

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Paper

Experimental results on wavefront correction using the self-coherent camera

M. Mas, P. Baudoz, J. Mazoyer, R. Galicher, G. Rousset

Proceedings Volume 8446, 844689 (2012) https://doi.org/10.1117/12.926586

KEYWORDS: Deformable mirrors, Coronagraphy, Actuators, Wavefronts, Numerical simulations, Cameras, Speckle, Point spread functions, Autoregressive models, Sensors

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Paper

Dark hole and planet detection: laboratory results using the self-coherent camera

Pierre Baudoz, Johan Mazoyer, Marion Mas, Raphaël Galicher, Gérard Rousset

Proceedings Volume 8446, 84468C (2012) https://doi.org/10.1117/12.926575

KEYWORDS: Coronagraphy, Planets, Cameras, Fourier transforms, Space telescopes, Infrared imaging, Modulation, Actuators, Data centers, Imaging spectroscopy

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Paper

Experimental parametric study of the self-coherent camera

Johan Mazoyer, Pierre Baudoz, Marion Mas, Gerard Rousset, Raphaël Galicher

Proceedings Volume 8442, 844250 (2012) https://doi.org/10.1117/12.926080

KEYWORDS: Coronagraphy, Point spread functions, Cameras, Deformable mirrors, Space telescopes, Planets, Stars, Fourier transforms, Actuators, Device simulation

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Paper

Atmospheric characterization of cold exoplanets with a 1.5-m space coronagraph

Anne-Lise Maire, Raphaël Galicher, Anthony Boccaletti, Pierre Baudoz, Jean Schneider, Kerri Cahoy, Daphne Stam, Wesley Traub

Proceedings Volume 8442, 84424G (2012) https://doi.org/10.1117/12.925563

KEYWORDS: Planets, Stars, Jupiter, Coronagraphy, Neptune, Clouds, Sensors, Photons, Exoplanets, Atmospheric modeling

Read Abstract +

Proceedings Article | 21 September 2012 Paper

Paper

SPICES: a 1.5-m space coronagraph for spectro-polarimetric characterization of cold exoplanets

Anne-Lise Maire, Anthony Boccaletti, Jean Schneider, Raphaël Galicher, Pierre Baudoz, Daphne Stam, Wesley Traub, Pierre-Olivier Lagage, Raffaele Gratton

Proceedings Volume 8442, 84420I (2012) https://doi.org/10.1117/12.925559

KEYWORDS: Planets, Coronagraphy, Clouds, Stars, Exoplanets, Telescopes, Space telescopes, Electroluminescent displays, Polarimetry, Jupiter

Read Abstract +

Proceedings Article | 10 August 2010 Paper

Paper

See-coast: polarimetric and spectral characterization of exoplanets with a small space telescope

Raphaël Galicher, Pierre Baudoz, Anthony Boccaletti, Anne-Lise Maire, Samuel Ronayette, Jean Schneider

Proceedings Volume 7731, 773126 (2010) https://doi.org/10.1117/12.857880

KEYWORDS: Planets, Space telescopes, Coronagraphy, Calibration, Telescopes, Deformable mirrors, Polarimetry, Exoplanets, Stars, Speckle

Read Abstract +

Proceedings Article | 28 July 2010 Paper

Paper

Focal plane wavefront sensor sensitivity for ELT planet finder

P. Baudoz, M. Mas, R. Galicher, G. Rousset

Proceedings Volume 7736, 77365S (2010) https://doi.org/10.1117/12.858272

KEYWORDS: Planets, Coronagraphy, Image processing, Adaptive optics, Picosecond phenomena, Wavefront sensors, Speckle, Phase measurement, Wavefronts, Cameras

Read Abstract +

Proceedings Article | 21 July 2010 Paper

Paper

Experimental results of multi-stage four quadrant phase mask coronagraph

Pi. Baudoz, F. Assemat, R. Galicher, J. Baudrand, A. Boccaletti

Proceedings Volume 7735, 773581 (2010) https://doi.org/10.1117/12.858273

KEYWORDS: Coronagraphy, Planets, Signal attenuation, Optics manufacturing, Prototyping, Telescopes, Cameras, Point spread functions, Colorimetry, Visible radiation

Read Abstract +

Proceedings Article | 21 July 2010 Paper

Paper

Self-coherent camera: first results of a high-contrast imaging bench in visible light

Marion Mas, Pierre Baudoz, Gerard Rousset, Raphaël Galicher, Jacques Baudrand

Proceedings Volume 7735, 773566 (2010) https://doi.org/10.1117/12.857898

KEYWORDS: Coronagraphy, Wavefronts, Deformable mirrors, Actuators, Sensors, Wavefront sensors, Visible radiation, Speckle, Cameras, Calibration

Read Abstract +

Proceedings Article | 17 July 2008 Paper

Paper

Self-Coherent Camera: active correction and post-processing for Earth-like planet detection

Raphaël Galicher, Pierre Baudoz, Gérard Rousset

Proceedings Volume 7015, 70156P (2008) https://doi.org/10.1117/12.787968

KEYWORDS: Coronagraphy, Wavefronts, Stars, Infrared imaging, Calibration, Cameras, Planets, Space telescopes, Error analysis, Deformable mirrors

Read Abstract +

Proceedings Article | 15 July 2008 Paper

Paper

Theory and laboratory tests of the multi-stage phase mask coronagraph

P. Baudoz, R. Galicher, J. Baudrand, A. Boccaletti

Proceedings Volume 7015, 70156C (2008) https://doi.org/10.1117/12.788722

KEYWORDS: Coronagraphy, Planets, Diffraction, Image processing, Stars, Large telescopes, Prototyping, Colorimetry, Exoplanets, Adaptive optics

Read Abstract +

Proceedings Article | 11 July 2008 Paper

Paper

Post-coronagraphic wave-front sensing for the exo-planet imaging camera and spectrograph, EPICS for the European ELT

Christophe Vérinaud, Roxane Mollard, Pierre Kern, Raphaël Galicher, Pierre Baudoz, Jean-Luc Beuzit, Gérard Rousset

Proceedings Volume 7015, 70151W (2008) https://doi.org/10.1117/12.789932

KEYWORDS: Coronagraphy, Sensors, Cameras, Error analysis, Adaptive optics, Stars, Spectrographs, Turbulence, Deformable mirrors, Integrated optics

Read Abstract +

Proceedings Article | 12 October 2004 Paper

Paper

Pupil Remapping Coronagraph (PRC): a high-performance coronagraph for a small-size visible Terrestrial Planet Finder

Olivier Guyon, Stephen Ridgway, Claude Aime, Anthony Boccaletti, Jean-Luc Beuzit, Raphael Galicher, Pierre Kern, Takayuki Kotani, Anne-Marie Lagrange, Richard Lyon, Fabien Malbet, Koji Murakawa, Masashi Otsubo, Daniel Rouan, Remi Soummer, Hiroshi Suto, Motohide Tamura, Robert Woodruff

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552429

KEYWORDS: Telescopes, Space telescopes, Apodization, Coronagraphy, Point spread functions, Planets, Mirrors, Imaging systems, Stars, Polishing

Read Abstract +

Showing 5 of 48 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement