Dr. Johan D. Floriot Profile

Dr. Johan D. Floriot

Research Engineer at Lab d'Astrophysique de Marseille

SPIE Involvement:

Author

Area of Expertise:

Optics , Telescope , Metrology , System engineering , Optical design , Instrumentation

Publications (22)

Proceedings Article | 30 August 2022 Poster + Paper

Poster + Paper

Experimental validation of exoplanet centring strategies for high dispersion coronagraphy

M. El Morsy, A. Vigan, M. Lopez, G. P. P. Otten, É. Choquet, F. Madec, A. Costille, J.-F. Sauvage, K. Dohlen, E. Muslimov, R. Pourcelot, J. Floriot, J.-A. Benedetti, P. Blanchard, P. Balard, G. Murray

Proceedings Volume 12185, 121858O (2022) https://doi.org/10.1117/12.2629312

KEYWORDS: Point spread functions, Fiber science, Calibration, Exoplanets, Mirrors, Cameras, Single mode fibers, Coronagraphy, Optical spheres, Electroluminescence

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí Telescope

Alix Nouvel de la Flèche, Jean-Luc Atteia, Hervé Valentin, Marie Larrieu, Jérémie Boy, Olivier Gravrand, Olivier Boulade, Jean-Claude Clemens, Aurélia Secroun, Eric Kajfasz, Olivier Llido, Stéphane Basa, François Dolon, Johan Floriot, Simona Lombardo, Adrien Lamoure, Laurent Rubaldo, Bruno Fieque, Julien Roumegoux, Hervé Geoffray, Alan Watson, William Lee, Nathaniel Butler

Proceedings Volume 12191, 121910Q (2022) https://doi.org/10.1117/12.2627826

KEYWORDS: Sensors, Calibration, Astronomy, Telescopes, Near infrared, Cameras, Data acquisition, Stars, Signal detection, Readout integrated circuits

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CAGIRE is the near infrared camera of the Colibrí robotic telescope, designed for the follow-up of SVOM alerts, mainly Gamma Ray Bursts (GRBs), and the quick imaging of sky regions where transient sources are detected by the SVOM satellite. CAGIRE is based on the Astronomical Large Format Array (ALFA) 2k x 2k SWIR sensor from the French consortium CEA-LYNRED. In the context of CAGIRE the sensor is operated in “Up the Ramp” mode to observe the sky in a square field of view of 21.7 arcmin on a side, in the range of wavelengths from 1.1 to 1.8 μm. An observation with CAGIRE consists of a series of short (1-2 minutes) exposures during which the pixels are read out every 1.3 second, continuously accumulating charges proportionally to the received flux, building a ramp.

The main challenge is to quickly process and analyse these ramps, in order to identify and study the near infrared counterparts of the bursts, within 5 minutes of the reception of an alert. Our preprocessing, which is under development, aims at providing reliable flux maps for the astronomy pipeline. It is based on a sequence of operations. First, calibration maps are used to identify saturated pixels, and for each pixel, the usable (non saturated) range of the ramp. Then, the ramps are corrected for the electronic common mode noise, and differential ramps are constructed. Finally, the flux is calculated from the differential ramps, using a previously calibrated map of pixel non-linearities. We present here the sequence of operations performed by the preprocessing, which are based on previous calibrations of the sensor response. These operations lead to the production of a flux map corrected from cosmic-rays hits, a map depicting the quality of the fit, a map of saturated pixels and a map of pixels hit by cosmic-rays, before the acquisition of the next ramp. These maps will be used by the astronomy pipeline to quickly extract the scientific results of the observations, like the identification of uncatalogued or quickly variable sources that could be GRB afterglows.

Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Development of diffraction gratings and grisms engraved by photolithography for NIR space instruments

J. Floriot, L. Martin, T. Pamplona, S. Basa

Proceedings Volume 12188, 1218825 (2022) https://doi.org/10.1117/12.2627330

KEYWORDS: Diffraction gratings, Manufacturing

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Tools and equipment needed for the installation, calibration and maintenance of the instruments and optics for the Colibrí Telescope in SPM Observatory

María Pedrayes-López, Stéphane Basa, Edgar Omar Cadena Zepeda, François Dolon, Liliana Figueroa, Johan Floriot, Elena Jiménez-Bailón, Rosalía Langarica, Eduardo López Ángeles, Erica Lugo-Ibarra, José Ochoa, Pierre Richaud, Silvio Tinoco, Alan Watson

Proceedings Volume 12182, 1218248 (2022) https://doi.org/10.1117/12.2630646

KEYWORDS: Telescopes, Mirrors, Finite element methods, Observatories, Interfaces

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

MOSAIC on the ELT: optomechanical design of the NIR spectrograph

J. Floriot, L. Martin, T. Pamplona, Z. Challita, B. Delabre, K. Dohlen, K. El Hadi, E. Prieto, J. G. Cuby, M. Puech, L. A. M. Tasca

Proceedings Volume 12184, 121842Z (2022) https://doi.org/10.1117/12.2628924

KEYWORDS: Cameras, Spectrographs, Near infrared, Optical design

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Structural design techniques applied in DDRAGO/CAGIRE instruments for the COLIBRĺ Telescope

Alejandro Farah, Andrés Heron-Romero, Jorge Fuentes-Fernández, Silvio Tinoco, Rosalía Langarica, Arthur Langlois, Johan Floriot, François Dolon, Jaime Ruíz-Díaz-Soto, Alan Watson, Stéphane Basa, Jérémie Boy, Salvador Cuevas, William Lee

Proceedings Volume 12184, 1218488 (2022) https://doi.org/10.1117/12.2630437

KEYWORDS: Telescopes, Tolerancing, Sensors, Structural design, Finite element methods, Electronics, Optics manufacturing, Interfaces, Charge-coupled devices, Optical components

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

MOSAIC on the ELT: development of a camera prototype for the near-infrared spectrograph unit

Laurent Martin, Tony Pamplona, Florian Ramage, Johan Floriot, Vincent Lapère, Zalpha Challita, Michael Carle, Bernard Delabre, Philippe Maquet, Philippe Godefroy, Kjetil Dohlen, Kacem El Hadi, Eric Prieto, Jean-Gabriel Cuby, Roser Pello, Mathieu Puech, Lidia Tasca

Proceedings Volume 12184, 121848C (2022) https://doi.org/10.1117/12.2628781

KEYWORDS: Cameras, Prototyping, Near infrared, Spectrographs, Sensors, Cryogenics

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The control system of the DDRAGO imager of COLIBRÍ, a ground follow-up telescope of the SVOM mission

Fernando Angeles, Stéphane Basa, Jérémie Boy, Salvador Cuevas, François Dolon, Alejandro Farah, Johan Floriot, Jorge Fuentes-Fernández, Rosalía Langarica, William Lee, Jaime Ruíz-Díaz-Soto, Silvio Tinoco, Hervé Valentin, Alan Watson

Proceedings Volume 12184, 1218489 (2022) https://doi.org/10.1117/12.2630452

KEYWORDS: Sensors, Electronics, Control systems, Power supplies, Computing systems, Charge-coupled devices, Fluctuations and noise, Telescopes, Connectors, Camera shutters

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Design of the DDRAGO wide-field imager for the COLIBRÍ Telescope

Rosalía Langarica, Alan Watson, Fernando Angeles, Jean-Luc Atteia, Stéphane Basa, Salvador Cuevas, François Dolon, Alejandro Farah, Johan Floriot, Jorge Fuentes-Fernández, William Lee, Jaime Ruíz-Díaz-Soto, Silvio Tinoco, Hervé Valentin

Proceedings Volume 12184, 121847W (2022) https://doi.org/10.1117/12.2629456

KEYWORDS: Telescopes, Sensors, Lenses, Charge-coupled devices, Imaging systems, Electronics, Mirrors, Interfaces, Optomechanical design

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Proceedings Article | 29 August 2022 Presentation

Presentation

MOSAIC on the ELT: the multi-object spectrograph for the ESO Extremely Large Telescope

Lidia Tasca, Mathieu Puech, Ruben Sanchez-Janssen, Myriam Rodrigues, Gavin Dalton, Eric Prieto, Franck Ducret, Jose Afonso, Beatriz Barbuy, Jean-Gabriel Cuby, Alexis Finoguenov, Jesus Gallego, Jorge Iglesias, Lex Kaper, Susan Kassin, Simon Morris, Christopher Miller, Goran Ostlin, Laura Pentericci, Matthias Steinmetz, Daniel Schaerer, Bodo Ziegler, Joar Brynnel, Bruno Castilho, Africa Castillo-Morales, Christopher Davison, Michel Dupieux, Kjetil Dohlen, Kacem El Hadi, Johan Floriot, Maria Luisa García-Vargas, Armando Gil de Paz, Isabelle Guinouard, Clement Hottier, Marc Jaquet, Annemieke Janssen, Andreas Kelz, Philippe Laporte, Laurent Martin, Marie Larrieu, Ian Lewis, Tim Morris, Ramon Navarro, Ana Perez, Walter Seifert, Christian Surace, Markus Thurneysen, Francois Wildi

Proceedings Volume 12184, 1218422 (2022) https://doi.org/10.1117/12.2630138

KEYWORDS: Spectrographs, Large telescopes, Galactic astronomy, Astronomical imaging, Stars, Near infrared, Spectroscopes, Near infrared spectroscopy, Molybdenum, Visible radiation

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Proceedings Article | 29 August 2022 Poster

Poster

MOSAIC on the ELT: Planification of the instrument AITV

Kacem El Hadi, Kjetil Dohlen, Zalpha Challita, Johan Floriot, Laurent Martin, Tony Pamplona, Marc Jaquet, Franck Ducret, Christian Surace, Myriam Rodrigues, Marie Larrieu, Eric Prieto, Jean-Gabriel Cuby, Mathieu Puech, Lidia Tasca

Proceedings Volume 12184, 121843C (2022) https://doi.org/10.1117/12.2629462

KEYWORDS: Telescopes, Spectrographs, Molybdenum, Adaptive optics, Stars, Star sensors, Standards development, Sensors, Sensor calibration, Relays

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

Design and structural architectural development of the enclosure of the COLIBRI Telescope

Erica Lugo-Ibarra, Liliana Figueroa Carrillo, Alan Watson, Stéphane Basa, Edgar Cadena, François Dolon, Johan Floriot, Elena Jiménez-Bailón, William Lee, Eduardo López Ángeles, José Ochoa Abundis, María Pedrayes-López

Proceedings Volume 12182, 121821N (2022) https://doi.org/10.1117/12.2630476

KEYWORDS: Telescopes, Observatories, Astronomical telescopes, Astronomy, Humidity, Vibration control, Temperature metrology

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

COLIBRI, a wide-field 1.3 m robotic telescope dedicated to the transient sky

Stéphane Basa, William Lee, François Dolon, Alan Watson, Johan Floriot, Jean-Luc Atteia, Nathaniel Butler, Damien Dornic, Simona Lombardo, Samuel Ronayette, Michel Ageron, François Agneray, Fernando Ángeles , Ludovik Bautista, Hafid Benamar-Aissa, Cyril Blanpain, Olivier Boulade, Jérémie Boy, Veronique Buat, Edgar Cadena, Salvador Cuevas, Alejandro Farah, Liliana Figueroa, Jorge Fuentes, Carole Gaïti, Pascal Gallais, Eric Kajfasz, Rosalía Langarica, Arthur Langlois, Marie Larrieu, Auguste Le Van Suu, Julien Lecubin, Eduardo López Ángeles, Erica Lugo, Adrien Malgoyre, Romain Mathon, Chrystel Moreau, Alix Nouvel-De-La-Flèche, José Luis Ochoa, Maria Pedrayes-López, Pascale Ramon, Jaime Ruíz-Díaz-Soto, Silvio Tinoco, Hervé Valentin

Proceedings Volume 12182, 121821S (2022) https://doi.org/10.1117/12.2627139

KEYWORDS: Telescopes, Observatories, Sensors, Robotics, Safety, Infrared radiation, Astronomy, Mirrors

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

The Infra-Red Telescope (IRT) on board the THESEUS mission

Diego Götz, Stéphane Basa, Frédéric Pinsard, Laurent Martin, Axel Arhancet, Enrico Bozzo, Christophe Cara, Isabel Escudero Sanz, Pierre-Antoine Frugier, Johan Floriot, Ludovic Genolet, Paul Hedderman, Emeric Le Floc'h, Isabelle Le Mer, Stéphane Paltani, Tony Pamplona, Céline Paries, Thibaut Prod'homme, Benjamin Schneider, Chris Tenzer, Thierry Tourrette, Henri Triou

Proceedings Volume 11444, 114442M (2020) https://doi.org/10.1117/12.2561435

KEYWORDS: Telescopes, Spectroscopes, Observatories, Space operations, Gamma radiation, Eye, Near infrared

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Proceedings Article | 10 July 2018 Paper

Paper

End-to-end simulations for COLIBRI, ground follow-up telescope for the SVOM mission.

D. Corre, S. Basa, A. Klotz, A. Watson, M. Ageron, P. Ambert, F. Ángeles, J. Atteia, P. Blanc, O. Boulade, J. Boy, E. Cadena, B. Cordier, S. Cuevas Cardona, F. Dolon, D. Dornic, D. Dubreuil, A. Farah, L. Figueroa, J. Floriot, J. Fuentes-Fernández, P. Gallais, E. Jiménez-Bailón, R. Langarica Lebre, J. Le Borgne, W. Lee, A. Le Van Suu, M. Marcos, R. Mathon, C. Meessen, J. Ochoa, E. Pallier, J. Platzer, F. Quirós, S. Ronayette, D. Turpin, H. Valentin, S. Vergani

Proceedings Volume 10705, 107051R (2018) https://doi.org/10.1117/12.2313127

KEYWORDS: Near infrared, Modeling, Astronomical imaging, Optical telescopes, Astronomical instrumentation

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

Primary and secondary mirror manufacturing for COLIBRI ground follow-up telescope of the SVOM mission

J. Floriot, M. Marcos, J. Fuentes-Fernandez, A. Watson, S. Cuevas Cardona, W. Lee, S. Basa, D. Corre, M. Ferrari, E. Hugot, K. Dohlen, F. Uribe, A. Simon, R. Lebre, E. Jimenez-Bailon, J. L. Ochoa, F. Quiros, E. Cadena, L. Figueroa, E. Pallier, J. Platzer, A. Klotz, J. L. !!!!!!!!Attéia, H. Valentin, R. Mathon, J. Boy, P. Ambert, J. F. Le Borgne, D. Dornic, C. Meessen, M. Ageron, O. Boulade, B. Cordier, D. Dubreuil, S. Ronayette, P. Gallais, A. Le Van Suu, P. E. Blanc, F. Dolon

Proceedings Volume 10706, 107060M (2018) https://doi.org/10.1117/12.2311656

KEYWORDS: Telescopes, Mirrors, Polishing, Wavefront sensors, Interferometry

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Proceedings Article | 6 July 2018 Paper

Paper

Structural design techniques applied in astronomical instruments

Alejandro Farah, Rosalia Langarica, Alan M. Watson, Jorge Fuentes-Fernández, Salvador Cuevas, Fernando Ángeles, Silvio Tinoco, Jaime Ruíz-Diáz-Soto, Carlos Tejada, Fernando Quirós, J. Floriot, M. Marcos, S. Basa, D. Corre, M. Ferrari, E. Hugot, K. Dohlen, E. Pallier, J. Platzer, A. Klotz, J. L. Attéia, H. Valentin, R. Mathon, J. Boy, P. Ambert, J. F. Le Borgne, D. Dornic, C. Meessen, M. Ageron, O. Boulade, B. Cordier, D. Dubreuil, S. Ronayette, P. Gallais, A. Le Van Suu, P. E. Blanc, F. Dolon

Proceedings Volume 10700, 107003K (2018) https://doi.org/10.1117/12.2314539

KEYWORDS: Telescopes, Computer aided design, Structural design, Interfaces, Astronomy, Mechanical engineering, Sensors, Electronics, Optical design, Optical components

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

Ultra fine measurement of the effect of a vacuum exposure on the central wavelength of narrow-bandpass interference filters manufactured by dual ion beam sputtering

Johan Floriot, Frédéric Lemarquis, Morgan Boucanssot, Michel Lequime

Proceedings Volume 10567, 1056742 (2017) https://doi.org/10.1117/12.2308139

KEYWORDS: Optical filters, Ion beams, Bandpass filters, Fabry–Perot interferometers, Sputter deposition, Manufacturing, Silica, Interference filters, Tunable lasers, Electronic filtering

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Proceedings Article | 22 July 2014 Paper

Paper

Stress polishing demonstrator for ELT M1 segments and industrialization

Emmanuel Hugot, Anaïs Bernard, Marie Laslandes, Johan Floriot, Thibaut Dufour, Denis Fappani, Jean Marc Combes, Marc Ferrari

Proceedings Volume 9145, 914539 (2014) https://doi.org/10.1117/12.2055867

KEYWORDS: Polishing, Mirrors, Actuators, Optical testing, Optics manufacturing, Finite element methods, Telescopes, Monochromatic aberrations, Zerodur, Optical spheres

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Proceedings Article | 30 September 2011 Paper

Paper

Stress polishing of E-ELT segment at LAM: full-scale demonstrator status

Marie Laslandes, Nicolas Rousselet, Marc Ferrari, Emmanuel Hugot, Johan Floriot, Sébastien Vivès, Gérard Lemaitre, Jean François Carré, Marc Cayrel

Proceedings Volume 8169, 816903 (2011) https://doi.org/10.1117/12.896704

KEYWORDS: Polishing, Mirrors, Actuators, Prototyping, Spherical lenses, Telescopes, Ion beam finishing, Optics manufacturing, Monochromatic aberrations, Manufacturing

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Proceedings Article | 18 June 2007 Paper

Paper

Surface metrology with a stitching Shack-Hartmann profilometric head

J. Floriot, X. Levecq, S. Bucourt, M. Thomasset, F. Polack, M. Idir, P. Mercère, S. Brochet, T. Moreno

Proceedings Volume 6616, 66162A (2007) https://doi.org/10.1117/12.726058

KEYWORDS: Wavefront sensors, Mirrors, Head, Wavefronts, Spherical lenses, Metrology, Calibration, Microlens, Synchrotrons, Surface finishing

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Proceedings Article | 25 February 2004 Paper

Paper

Cascaded solid-spaced filters for DWDM applications

Johan Floriot, Fabien Lemarchand, Michel Lequime

Proceedings Volume 5250, (2004) https://doi.org/10.1117/12.514048

KEYWORDS: Electronic filtering, Semiconducting wafers, Transmittance, Optical filters, Mirrors, Dielectric mirrors, Wafer-level optics, Wavelength division multiplexing, Dense wavelength division multiplexing, Refractive index

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Showing 5 of 22 publications

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