Dr. Christophe Michel Profile

Dr. Christophe Michel

Research Engineer

Area of Expertise:

IBS coatings, large optics

Websites:

Company Website

Publications (17)

Proceedings Article | 3 September 2024 Presentation + Paper

Presentation + Paper

MORFEO at ELT: the adaptive optics module for ELT

Paolo Ciliegi, Guido Agapito, Matteo Aliverti, Francesca Annibali, Carmelo Aridiacono, Nicolò Azzaroli, Andrea Balestra, Ivano Baronchelli, Alessandro Ballone, Andrea Baruffolo, Federico Battaini, Simone Benedetti, Maria Bergomi, Andrea Bianco, Marco Bonaglia, Runa Briguglio, Lorenzo Busoni, Michele Cantiello, Giulio Capasso, Giulia Carlà, Elena Carolo, Enrico Cascone, Gaël Chauvin, Manal Chebbo, Simonetta Chinellato, Vincenzo Cianniello, Mirko Colapietro, Jean-Jacques Correia, Giuseppe Cosentino, Elia Costa, Domenico D'Auria, Vincenzo De Caprio, Nicholas Devaney, Ivan Di Antonio, Amico Di Cianno, Andrea Di Dato, Simone Di Filippo, Benedetta Di Francesco, Ugo Di Giammatteo, Chiara Di Prospero, Gianluca Di Rico, Andrea Di Rocco, Daphne Diretto, Mauro Dolci, Christian Eredia, Simone Esposito, Daniela Fantinel, Jacopo Farinato, Philippe Feautrier, Italo Foppiani, Matteo Genoni, Enrico Giro, Laurence Gluck, Alexander Goncharov, Paolo Grani, Davide Greggio, Sylvain Guieu, Marco Gullieuszik, Zoltan Hubert, Laurent Jocou, Salvatore Lampitelli, Tommaso Lapucci, Fulvio Laudisio, Vincent Leal, Yves Magnard, Demetrio Magrin, Deborah Malone, Luca Marafatto, Christophe Michel, David Mouillet, Thibaut Moulin, Matteo Munari, Sylvain Oberti, Fabrice Pancher, Giorgio Pariani, Amedeo Petrella, Laurent Pinnard, Cedric Plantet, Elisa Portaluri, Alfio Puglisi, Patrick Rabou, Kalyan Radhakrishnan, Roberto Ragazzoni, Edoardo Maria Alberto Redaelli, Marco Riva, Sylvain Rochat, Gabriele Rodeghiero, Luca Rosignoli, Bernardo Salasnich, Salvatore Savarese, Marcello Scalera, Pietro Schipani, Danilo Selvestrel, Benoit Sassolas, Rosanna Sordo, Ludovico Teodori, Gabriele Umbriaco, Angelo Valentini, Marco Xompero

Proceedings Volume 13097, 1309722 (2024) https://doi.org/10.1117/12.3019058

KEYWORDS: Wavefront sensors, Design, Calibration, Equipment, Adaptive optics, Sensors, Deformable mirrors, Mirrors, Laser guide stars, Reflection

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Proceedings Article | 27 August 2024 Presentation + Paper

Presentation + Paper

The MICADO first-light imager for the ELT: first steps of the SCAO system MAIT

Yann Clénet, Eric Gendron, Fabrice Vidal, Mathieu Cohen, Frédéric Chapron, Arnaud Sevin, Tristan Buey, Sylvain Guieu, Sylvestre Taburet, Bruno Borgo, Jean-Michel Huet, Olivier Dupuis, Kévin Cloiseau, Alexandre Blin, Julien Gaudemard, Claude Collin, Julian Porras, Florian Ferreira, Jordan Raffard, Fanny Chemla, Vincent Lapeyrère, Eric Meyer, Nicolas Gautherot, Emmanuel Tisserand, Hervé Locatelli, Gilles Fasola, Lahoucine Ghouchou, Camille Gennet, François Meyer, Amal Zidi, Caroline Kulcsár, Henri-François Raynaud, Benoit Sassolas, Laurent Pinard, Christophe Michel, Damien Gratadour, Roderick Dembet, Pierre Baudoz, Elsa Huby, Sebastian Rabien, Eckhard Sturm, Richard Davies

Proceedings Volume 13097, 1309728 (2024) https://doi.org/10.1117/12.3018078

KEYWORDS: Wavefront sensors, Manufacturing, Parabolic mirrors, Off axis mirrors, Adaptive optics, Turbulence, Real-time computing, Modulation, Dichroic mirrors, Telescopes

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Proceedings Article | 27 August 2024 Poster + Paper

Poster + Paper

Final optical design of MORFEO for the ELT

D. Magrin, G. Pariani, M. Munari, P. Rabou, A. Bianco, M. Bergomi, E. Redaelli, M. Aliverti, M. Riva, J. Farinato, L. Pinard, C. Michel, B. Sassolas, A. Ballone, G. Rodeghiero, G. Carlà, D. Greggio, L. Busoni, V. De Caprio, V. Cianniello, M. Kurita, L. Teodori, A. Di Rocco, P. Ciliegi

Proceedings Volume 13097, 1309754 (2024) https://doi.org/10.1117/12.3020359

KEYWORDS: Mirrors, Optical surfaces, Beam path, Equipment, Mirror surfaces, Design, Wavefront sensors, Astrometry, Adaptive optics, Spherical lenses

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Proceedings Article | 26 August 2024 Paper

Paper

MORFEO@ELT: extreme large size dichroic mirror

Andrea Bianco, Benoit Sassolas, Laurent Pinard, Christophe Michel, Demetrio Magrin, Paolo Ciliegi

Proceedings Volume 13100, 1310060 (2024) https://doi.org/10.1117/12.3021143

KEYWORDS: Coating, Dichroic mirrors, Reflectivity, Reflection, Deformable mirrors, Coating thickness, Tunable filters, Adaptive optics, Wavefront sensors, Refractive index

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Proceedings Article | 18 July 2024 Presentation + Paper

Presentation + Paper

The MICADO first light imager for the ELT: overview and current status

E. Sturm, R. Davies, J. Alves, Y. Clénet, J. Kotilainen, A. Monna, H. Nicklas, J.-U. Pott, E. Tolstoy, B. Vulcani, J. Achren, S. Annadevara, H. Anwand-Heerwart, C. Arcidiacono, S. Barboza, L. Barl, P. Baudoz, R. Bender, N. Bezawada, F. Biondi, P. Bizenberger, A. Blin, A. Boné, P. Bonifacio, B. Borgo, J. van den Born, T. Buey, Y. Cao, F. Chapron, G. Chauvin, F. Chemla, K. Cloiseau, M. Cohen, C. Colin, O. Czoske, J.-O. Dette, M. Deysenroth, E. Dijkstra, S. Dreizler, O. Dupuis, G. van Egmond, F. Eisenhauer, E. Elswijk, A. Emslander, M. Fabricius, G. Fasola, F. Ferreira, N. Förster Schreiber, A. Fontana, J. Gaudemard, N. Gautherot, E. Gendron, C. Gennet, R. Genzel, L. Ghouchou, S. Gillessen, D. Gratadour, A. Grazian, F. Grupp, S. Guieu, M. Gullieuszik, M. de Haan, J. Hartke, M. Hartl, F. Haussmann, T. Helin, H.-J. Hess, R. Hofferbert, H. Huber, E. Huby, J.-M. Huet, D. Ives, A. Janssen, P. Jaufmann, T. Jilg, D. Jodlbauer, J. Jost, W. Kausch, H. Kellermann, F. Kerber, H. Kravcar, K. Kravchenko, C. Kulcsár, H. Kuncarayakti, P. Kunst, S. Kwast, F. Lang, J. Lange, V. Lapeyrere, B. Le Ruyet, K. Leschinski, H. Locatelli, D. Massari, S. Mattila, S. Mei, F. Merlin, E. Meyer, C. Michel, L. Mohr, M. Montargès, F. Müller, N. Münch, R. Navarro, U. Neumann, N. Neumayer, L. Neumeier, F. Pedichini, A. Pflüger, R. Piazzesi, L. Pinard, J. Porras, E. Portulari, N. Przybilla, S. Rabien, J. Raffard, R. Ragazzoni, R. Ramlau, J. Ramos, S. Ramsay, H.-F. Raynaud, P. Rhode, A. Richter, H.-W. Rix, M. Rodenhuis, R.-R. Rohloff, R. Romp, P. Rousselot, N. Sabha, B. Sassolas, J. Schlichter, M. Schuil, M. Schweitzer, U. Seemann, A. Sevin, M. Simioni, L. Spallek, A. Sönmez, J. Suuronen, S. Taburet, J. Thomas, E. Tisserand, P. Vaccari, E. Valenti, G. Verdoes Kleijn, M. Verdugo, F. Vidal, R. Wagner, M. Wegner, D. van Winden, J. Witschel, A. Zanella, W. Zeilinger, J. Ziegleder, B. Ziegler

Proceedings Volume 13096, 1309611 (2024) https://doi.org/10.1117/12.3017752

KEYWORDS: Imaging systems, James Webb Space Telescope, Imaging spectroscopy, Design and modelling, Adaptive optics, Stars, Manufacturing, Equipment, Wavefront sensors, Spectroscopes

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Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

The MICADO first light imager for the ELT: overview of the SCAO module at its final design

Yann Clénet, Tristan Buey, Eric Gendron, Sonia Karkar, Fabrice Vidal, Mathieu Cohen, Frédéric Chapron, Arnaud Sevin, Simone Thijs, Sylvestre Taburet, Bruno Borgo, Jean-Michel Huet, Alexandre Blin, Olivier Dupuis, Julien Gaudemard, Florian Ferreira, Jordan Raffard, Fanny Chemla, Vincent Lapeyrère, Vincent Deo, Arielle Bertrou-Cantou, Nicolas Galland, Sylvain Guieu, Eric Meyer, Nicolas Gautherot, Emmanuel Tisserand, Hervé Locatelli, François Meyer, Amal Zidi, Caroline Kulcsár, Henri-François Raynaud, Benoit Sassolas, Laurent Pinard, Christophe Michel, Damien Gratadour, Bertrand Le Ruyet, Roderick Dembet, Manuel Ortiz, Claude Collin, Vartan Arslanyan, Bosko Doncic, Lahoucine Ghouchou, Issan Ibn Taïeb, Pierre Baudoz, Elsa Huby, Gérard Rousset, Sebastian Rabien, Veronika Hörmann, Eckhard Sturm, Richard Davies

Proceedings Volume 12185, 121854S (2022) https://doi.org/10.1117/12.2629856

KEYWORDS: Prototyping, Adaptive optics, Calibration, Real-time computing

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Dichroic coatings for astronomical instrumentation

E. Barthélémy-Mazot, M. Coulon, D. Hofman, C. Michel, L. Pinard, J. Teillon, B. Sassolas

Proceedings Volume 11451, 114515K (2020) https://doi.org/10.1117/12.2563398

KEYWORDS: Optical coatings, Astronomical instrumentation, Optics manufacturing, Astronomy, Astronomical imaging, Optical testing, Lawrencium, Spectrographs

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

High uniformity IBS coatings for the world’s largest Fabry-Perot etalon of the VTF instrument

L. Pinard, C. Michel, B. Sassolas, J. Teillon, G. Cagnoli, M. Sigwarth, T. Kentischer, W. Schmidt, B. Reichman

Proceedings Volume 10706, 107061R (2018) https://doi.org/10.1117/12.2312007

KEYWORDS: Fabry–Perot interferometers, Mirrors, Optical coatings, Reflectivity, LIGO, Interferometers, Wavefronts, Absorption, Silica, Coating equipment

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Proceedings Article | 10 July 2018 Paper

Paper

Dichroic and anti-reflective coatings for astronomical instrumentation

C. Michel, E. Barthelemy, D. Hofman, L. Pinard, B. Sassolas, J. Teillon, G. Cagnoli

Proceedings Volume 10706, 107064Y (2018) https://doi.org/10.1117/12.2312076

KEYWORDS: Optical coatings, Lenses, Antireflective coatings, Optics manufacturing, Spectrographs, Cameras, Reflectivity, Thin film coatings, Silica

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Proceedings Article | 9 August 2016 Paper

Paper

Development of high reflectivity coatings for large format Fabry-Perot etalons

M. Sigwarth, J. Baumgartner, A. Bell, G. Cagnoli, A. Fischer, C. Halbgewachs, F. Heidecke, Th. Kentischer, B. Kestner, P. Kuschnir, O. von der Lühe, L. Pinard, Ch. Michel, W. Reichman, B. Sassolas, Th. Scheiffelen, W. Schmidt

Proceedings Volume 9908, 99084F (2016) https://doi.org/10.1117/12.2232271

KEYWORDS: Fabry–Perot interferometers, Optical coatings, Reflectivity, Silica, Antireflective coatings, Prototyping, Annealing, Ion beam finishing, Thin film coatings, Polishing

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The Visible Tunable Filter (VTF) is a diffraction-limited narrowband tunable instrument for imaging spectropolarimetry in the wavelength range between 520 and 860 nm. It is based on large-format Fabry Perot. The instrument will be one of the first-light instruments of the 4m aperture Daniel K. Inoue Solar Telescope (DKIST). To provide a field of view of 1 arcmin and a spectral resolution λ/Δλ of about 100.000, the required free aperture of the Fabry Perot is 250mm. The high reflectivity coatings for the Etalon plates need to meet the specifications for the reflectivity over the entire wavelength range and preserve the plate figure specifications of better λ/300, and a micro roughness of < 0.4 nm rms. Coated surfaces with similar specifications have successfully been made for reflecting mirrors on thick substrates but not for larger format Fabry-Perot systems. Ion Beam Sputtering (IBS) based coatings provide stable, homogeneous, and smooth coatings. But IBS coatings also introduce stresses to the substrate that influence the plate figure in our case at the nm level. In a joint effort with an industry partner and a French CNRS research laboratory, we developed and tested processes on small and full size substrates, to provide coated Etalon plates to the required specifications. Zygo Extreme Precision Optics, Richmond, CA, USA, is polishing and figuring the substrates, doing the metrology and FE analysis. LMA (Laboratoire Matériaux Avancés, Lyon, France) is designing and making the IBS coatings and investigating the detailed behavior of the coatings and related processes. Both partners provide experience from manufacturing coated plane optics for gravitational wave detection experiments and EUV optics. The Kiepenheuer-Institut für Sonnenphysik, Freiburg, Germany is designing and building the VTF instrument and is leading the coating development. We present the characteristics of the coatings and the substrate processing concept, as well as results from tests on sample size and from full size substrate processing. We demonstrate that the tight specifications for a single Etalon can be reached.

Proceedings Article | 23 September 2015 Paper

Paper

Anti-reflective coating corrrection for ultra-low-reflectance large optics

B. Sassolas, J. Teillon, J. Degallaix, C. Michel, L. Pinard, G. Cagnoli

Proceedings Volume 9627, 96271V (2015) https://doi.org/10.1117/12.2191242

KEYWORDS: Reflectivity, Coating, Antireflective coatings, Crystals, Quartz, Sensors, Refractive index, Calibration, Ion beams, Sputter deposition

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Proceedings Article | 28 June 2013 Paper

Paper

Large filters for wide-field survey telescope LSST

Nazario Morgado, Laurent Pinard, Benoit Sassolas, Raffaele Flaminio, Daniéle Forest, Bernard Lagrange, Christophe Michel, Pierre Antilogus

Proceedings Volume 8450, 84503Q (2013) https://doi.org/10.1117/12.926071

KEYWORDS: Linear filtering, Optical filters, Large Synoptic Survey Telescope, Optical coatings, Mirrors, Absorption, Sensors, Transmittance, Digital filtering, Silica

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Proceedings Article | 18 December 2012 Paper

Paper

Realization of low-loss mirrors with sub-nanometer flatness for future gravitational wave detectors

C. Michel, N. Morgado, L. Pinard, B. Sassolas, R. Bonnand, J. Degallaix, D. Forest, R. Flaminio, G. Billingsley

Proceedings Volume 8550, 85501P (2012) https://doi.org/10.1117/12.981766

KEYWORDS: Mirrors, Coating, Sensors, Silica, LIGO, Fabry–Perot interferometers, Absorption, Scattering, Planetary systems, Thin film coatings

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Proceedings Article | 24 September 2012 Paper

Paper

LSST camera optics design

Scot Olivier, Vincent Riot, David Gilmore, Brian Bauman, Steve Pratuch, Lynn Seppala, John Ku, Martin Nordby, Mike Foss, Pierre Antilogus, Nazario Morgado, Benoit Sassolas, Raffaele Flaminio, Christophe Michel

Proceedings Volume 8446, 84466B (2012) https://doi.org/10.1117/12.926710

KEYWORDS: Cameras, Optical filters, Large Synoptic Survey Telescope, Lenses, Coating, Interfaces, Optical design, Bandpass filters, Spherical lenses, Silica

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Proceedings Article | 4 October 2011 Paper

Paper

Thickness uniformity improvement for the twin mirrors used in advanced gravitational wave detectors

B. Sassolas, Q. Benoît, R. Flaminio, D. Forest, J. Franc, M. Galimberti, A. Lacoudre, C. Michel, J.-L. Montorio, N. Morgado, L. Pinard

Proceedings Volume 8168, 81681Q (2011) https://doi.org/10.1117/12.896318

KEYWORDS: Mirrors, Coating, Silica, LIGO, Sensors, Interferometers, Reflectivity, Sputter deposition, Tantalum, Refractive index

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Proceedings Article | 3 April 2008 Paper

Paper

EUV near normal incidence collector development at SAGEM

R. Mercier Ythier, X. Bozec, R. Geyl, A. Rinchet, Christophe Hecquet, Marie-Françoise Ravet-Krill, Franck Delmotte, Benoît Sassolas, Raffaele Flaminio, Jean-Marie Mackowski, Christophe Michel, Jean-Luc Montorio, Nazario Morgado, Laurent Pinard, Elodie Roméo

Proceedings Volume 6921, 692135 (2008) https://doi.org/10.1117/12.787620

KEYWORDS: Reflectivity, Mirrors, Coating, Extreme ultraviolet, Plasma, Manufacturing, Polishing, Annealing, Grazing incidence, Silicon carbide

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Proceedings Article | 26 February 2004 Paper

Paper

Original optical metrologies of large components

Bernard Cimma, Danielle Forest, Patrick Ganau, Bernard Lagrange, Jean-Marie Mackowski, Christophe Michel, Jean-Luc Montorio, Nazario Morgado, Renee Pignard, Laurent Pinard, Alban Remillieux

Proceedings Volume 5252, (2004) https://doi.org/10.1117/12.513279

KEYWORDS: Absorption, Coating, Birefringence, Silica, Sapphire, Mirrors, Sensors, Interferometers, Metrology, Scattering

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Showing 5 of 17 publications

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