Dr. Grégory P. Lousberg Profile

Dr. Grégory P. Lousberg

System Engineering Manager at AMOS AS

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Author

Publications (20)

Proceedings Article | 17 June 2024 Presentation + Paper

Design and manufacturing of the CHIME spectrometer unit

Vincent Moreau, Gregory Lousberg, Benoît Borguet, Etienne Renotte, Roberto Di Paola, Pierre Gloesener

Proceedings Volume 13021, 1302102 (2024) https://doi.org/10.1117/12.3017071

KEYWORDS: Spectroscopy, Manufacturing, Design, Spectrographs, Diffraction gratings, Optics manufacturing, Blazed gratings, Hyperspectral imaging

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Proceedings Article | 29 August 2022 Poster + Paper

DAG 4m telescope: optics completion, on-site integration and test

Olivier Pirnay, Pierre Albart, Christian Bastin, Jonathan de Ville, Eric Gabriel, Thibault Leseur, Grégory Lousberg, Laurence Méant, Sabrina Orban, Jean-Marc Tortolani, Manfredi Amalfi, Gianpietro Marchiori, Francesco Rampini, Andrea Busatta, Cahit Yeşilyaprak, Onur Keskin

Proceedings Volume 12182, 121824A (2022) https://doi.org/10.1117/12.2632248

KEYWORDS: Mirrors, Telescopes, Active optics, Adaptive optics, Image quality, Optical alignment, Optical instrument design, Actuators

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AMOS with EIE as main subcontractor has recently completed the erection of the 4 m telescope located at the Turkish Eastern Anatolia Observatory (DAG) set up by the Ataturk University Astrophysics Research and Application Centre (ATASAM) of Erzurum. The telescope design is based on a Ritchey-Chrétien configuration with two folded Nasmyth focal planes and a focal length of 56m. The optical train is composed of three mirrors: the primary mirror (M1) with an optical aperture of 4m, a convex secondary mirror (M2), and a large flat folding mirror (M3). Diffraction-limited performances in optical and near infrared spectral bands will be achieved thanks to the combination of active and adaptive optics systems. The active optics system is controlling the shape of the primary mirror by means of 66 axial force actuators and position actively the secondary and tertiary mirrors by means of hexapods. The adaptive optics system will be implemented at one of the two Nasmyth ports. As main contractor, AMOS is in charge of the overall project management, the system engineering, the optical design and the active optics development. As main sub-contractor and partner of AMOS, EIE is in charge of the development of the mount. Following the factory acceptance in Europe, the telescope was dismounted and delivered in early 2021. The activities onsite were carried out according to the assembly, integration and verification plan (AIV plan). In the meantime, the fabrication of the 4 m primary mirror was completed, and the full set of mirrors was forwarded on-site before the end of the year 2021. In this paper is presented a brief description of the design and performances of the telescope followed by the project progress status at the time the optics are being integrated in the telescope for the first time. This includes the review of the mirrors as-built quality and the excepted performances of the telescope mount after alignment and tuning. The path forward final acceptance is explained with the presentation of the optical alignment method and the test carried-out on-sky.

Proceedings Article | 29 August 2022 Paper

Active optics system implemented in the primary mirror support of the Daniel K. Inouye Solar Telescope (DKIST) solar telescope: design, analysis and tests

Grégory Lousberg, Vincent Moreau, Jean-Marc Schumacher, Eric Gabriel, Carlo Flebus

Proceedings Volume 12182, 121823M (2022) https://doi.org/10.1117/12.2632236

KEYWORDS: Mirrors, Actuators, Solar telescopes, Active optics, Telescopes, Finite element methods, Adaptive optics, Performance modeling, Optical instrument design, Thermal modeling

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Proceedings Article | 25 August 2022 Presentation + Paper

Mount Abu 2.5m Telescope: first light and performance assessment

Christian Bastin, Gregory Lousberg, Olivier Pirnay, Cédric Adam, Pierre Albart, Jonathan De Ville, Alexis Feutry, Carlo Flebus, Nicolas Fontana, Eric Gabriel, Audrey Lanotte, Fabien Lemagne, Thibault Leseur, Laurence Méant, Nathalie Ninane, Sabrina Orban, Jean-Marc Tortolani, Jonathan Verspecht

Proceedings Volume 12187, 121870H (2022) https://doi.org/10.1117/12.2632285

KEYWORDS: Telescopes, Active optics, Mirrors, Optical alignment, Optics manufacturing, Image quality, Cameras, Wavefronts, Wavefront sensors, Optical testing

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Proceedings Article | 11 June 2021 Open Access

Design, manufacturing, alignment, and testing of the Back Telescope assembly of the MeteoSat Third Generation InfraRed Sounder (MTG-IRS)

Grégory Lousberg, Coralie De Clercq, Brunella Carlomagno, Jérémie Salazar, Virgile Monamy, Romain Vandoolaeghe, Jean-Marc Defise, Carlo Flebus

Proceedings Volume 11852, 118521T (2021) https://doi.org/10.1117/12.2599323

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Proceedings Article | 14 January 2021 Poster + Paper

Mont ABU 2.5m Telescope: How to assess large telescope performances in factory?

Audrey Lanotte, Nicolas Fontana, Cédric Adam, Pierre Albart, Jonathan De Ville, Carlo Flebus, Eric Gabriel, Fabien Lemagne, Thibault Leseur, Joseph Lombardo, Grégory Lousberg, Sabrina Orban, Olivier Pirnay, Jean-Marc Tortolani

Proceedings Volume 11445, 1144530 (2021) https://doi.org/10.1117/12.2563419

KEYWORDS: Telescopes, Optics manufacturing, Large telescopes, Design for manufacturability, Optical fabrication, Optical instrument design, Observatories, Optical telescopes, Physical research, Disk lasers

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Proceedings Article | 12 July 2018 Paper

EUCLID: design, analysis, fabrication, and test of a 1.3 m collimator for the on-ground characterization of the EUCLID payload module

Olivier Pirnay, Grégory Lousberg, Virgile Monamy, Pierre Gloesener, Katja Rieth, Fabien Lemagne, Grégoire Réaud, Carlo Flebus

Proceedings Volume 10698, 1069835 (2018) https://doi.org/10.1117/12.2313533

KEYWORDS: Collimators, Mirrors, Interferometers, Image quality, Cryogenics, Optical fabrication, Wavefronts, Optical fibers, Reflectivity, Line of sight stabilization, Thermal analysis

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Proceedings Article | 6 July 2018 Paper

Mt ABU 2.5m Telescope: design and fabrication

Olivier Pirnay, Grégory Lousberg, Audrey Lanotte, Eric Gabriel, Jean-Marc Tortolani, Nicolas Fontana, Sabrina Orban

Proceedings Volume 10700, 107005S (2018) https://doi.org/10.1117/12.2313364

KEYWORDS: Telescopes, Mirrors, Control systems, Actuators, Cameras, Active optics, Optical instrument design, Image quality, Optics manufacturing, Wavefront sensors, Wavefront analysis

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Proceedings Article | 6 July 2018 Presentation + Paper

Commissioning and first scientific operations of the wide-field 2.6m Javalambre Survey Telescope

A. J. Cenarro, A. Ederoclite, C. Íñiguez, A. Marín-Franch, H. Vázquez Ramió, A. Yanes-Díaz, S. Chueca, N. Lasso-Cabrera, S. Rueda-Teruel, F. Rueda-Teruel, D. Cristóbal-Hornillos, J. Varela, G. López-Alegre, R. Bello, J.-L. Antón-Bravo, S. Bielsa de Toledo, M. Domínguez-Martínez, A. Moreno-Signes, R. Iglesias-Marzoa, M. C. Díaz-Martín, T. Civera, J. Hernández-Fuertes, D. Muniesa-Gallardo, J. Castillo, A. López-Sáinz, M. Moles, G. Lousberg, C. Bastin, O. Pirnay

Proceedings Volume 10700, 107000D (2018) https://doi.org/10.1117/12.2309520

KEYWORDS: Telescopes, Cameras, Optical filters, Monochromatic aberrations, Control systems, Astronomy, Imaging systems, Charge-coupled devices, Observatories

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Proceedings Article | 6 July 2018 Presentation + Paper

DAG 4m telescope: assembly, integration and testing

Olivier Pirnay, Grégory Lousberg, Eric Gabriel, Gianpietro Marchiori, Andrea Busatta, Cahit Yeşilyaprak, Onur Keskin

Proceedings Volume 10700, 107001Y (2018) https://doi.org/10.1117/12.2313476

KEYWORDS: Optical testing, Astronomical telescopes, Telescope design, Large telescopes, Telescopes, Mirrors, Active optics, Actuators, Optical instrument design, Image quality, Cameras, Optical fabrication, Control systems, Optical alignment

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Proceedings Article | 15 June 2018 Paper

EUCLID: design, analysis, fabrication, and test of a 1.3m collimator for the on-ground characterization of the EUCLID Payload Module

Olivier Pirnay, Grégory Lousberg, Virgile Monamy, Pierre Gloesener, Katja Rieth, Fabien Lemagne, Carlo Flebus

Proceedings Volume 10692, 106920B (2018) https://doi.org/10.1117/12.2313525

KEYWORDS: Collimators, Mirrors, Interferometers, Image quality, Cryogenics, Optical fabrication, Polishing, Wavefronts, Optical fibers, Reflectivity, Thermal analysis, Line of sight stabilization

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Proceedings Article | 17 November 2017 Open Access

Design, manufacturing and alignment of a fluorescence imaging spectrometer based on refractive optics and a transmission grating

G. Lousberg, F. Lemagne, P. Gloesener, C. Flebus, S. Rougelot, C. Coatantiec, B. Harnisch

Proceedings Volume 10563, 1056331 (2017) https://doi.org/10.1117/12.2304156

KEYWORDS: Optical alignment, Optics manufacturing, Telescopes, Space telescopes, Spatial resolution, Optical benches, 3D metrology, Manufacturing, Astronomical imaging, Spectroscopy

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Proceedings Article | 9 August 2016 Paper

OAJ 2.6m survey telescope: optical alignment and on-sky evaluation of IQ performances

Gregory Lousberg, Christian Bastin, Vincent Moreau, Olivier Pirnay, Carlo Flebus, Sergio Chueca, César Iñiguez, Alessandro Ederoclite, Héctor Ramió, A. Javier Cenarro

Proceedings Volume 9911, 991109 (2016) https://doi.org/10.1117/12.2234267

KEYWORDS: Telescopes, Image quality, Wavefront sensors, Optical alignment, Mirrors, Cameras, Image processing, Wavefronts, Monochromatic aberrations, Stars

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Proceedings Article | 27 July 2016 Paper

The design of an adaptive optics telescope: the case of DAG

Laurent Jolissaint, Onur Keskin, Lorenzo Zago, Sinan Kaan Yerli, Cahit Yesilyaprak, Emeric Mudry, Grégory Lousberg

Proceedings Volume 9906, 99063J (2016) https://doi.org/10.1117/12.2233297

KEYWORDS: Telescopes, Telescopes, Adaptive optics, Active optics, Optical instrument design, Wavefronts, Mirrors, Space telescopes, Sensors, Monochromatic aberrations, Error analysis

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Proceedings Article | 22 July 2016 Paper

Active optics system for the 4m telescope of the Eastern Anatolia Observatory (DAG)

Gregory Lousberg, Emeric Mudry, Christian Bastin, Jean-Marc Schumacher, Eric Gabriel, Olivier Pirnay, Carlo Flebus

Proceedings Volume 9912, 99126F (2016) https://doi.org/10.1117/12.2234261

KEYWORDS: Telescopes, Mirrors, Active optics, Optical instrument design, Optics manufacturing, Actuators, Observatories, Monochromatic aberrations, Wavefront sensors, Telescopes, Optical instrument design, Optics manufacturing, Wavefronts

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Proceedings Article | 22 July 2016 Paper

New isostatic mounting concept for a space born Three Mirror Anastigmat (TMA) on the Meteosat Third Generation Infrared Sounder Instrument (MTG-IRS)‎

Maximilian Freudling, Jesko Klammer, Gregory Lousberg, Jean-Marc Schumacher, Christian Körner

Proceedings Volume 9912, 99121F (2016) https://doi.org/10.1117/12.2232782

KEYWORDS: Space telescopes, Space mirrors, Mirrors, Telescopes, Infrared radiation, Infrared telescopes, Optical instrument design, Aluminum, Mirror structures, Aerospace engineering

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Proceedings Article | 23 September 2015 Paper

Design and analysis of an active optics system for a 4-m telescope mirror combining hydraulic and pneumatic supports

Gregory Lousberg, Vincent Moreau, Jean-Marc Schumacher, Maxime Piérard, Aude Somja, Pierre Gloesener, Carlo Flebus

Proceedings Volume 9626, 962624 (2015) https://doi.org/10.1117/12.2191272

KEYWORDS: Mirrors, Actuators, Active optics, Adaptive optics, Monochromatic aberrations, Telescopes, Finite element methods, Performance modeling, Solar telescopes, Optical instrument design

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Proceedings Article | 23 September 2015 Paper

Wavefront curvature sensing in a 2.5m wide-field telescope: design, analysis, and implementation for real-time correction of telescope alignment

Gregory Lousberg, Vincent Moreau, Olivier Pirnay, Pierre Gloesener, Carlo Flebus

Proceedings Volume 9626, 962625 (2015) https://doi.org/10.1117/12.2191274

KEYWORDS: Telescopes, Wavefronts, Sensors, Wavefront sensors, Reconstruction algorithms, Charge-coupled devices, Zemax, Optical instrument design, Stars, Optical alignment

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Proceedings Article | 22 July 2014 Paper

OAJ 2.6-m survey telescope: assembly, integration, and testing

Olivier Pirnay, Christian Bastin, Grégory Lousberg, Jean-Marc Tortolani, Peter Verheyden

Proceedings Volume 9145, 91452E (2014) https://doi.org/10.1117/12.2056513

KEYWORDS: Telescopes, Image quality, Mirrors, Cameras, Active optics, CCD image sensors, Optical fabrication, Sensors, Optical alignment, Optics manufacturing

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Proceedings Article | 17 September 2012 Paper

OAJ: 2.6m wide field survey telescope

Olivier Pirnay, Vincent Moreau, Grégory Lousberg

Proceedings Volume 8444, 84440G (2012) https://doi.org/10.1117/12.926174

KEYWORDS: Telescopes, Mirrors, Image quality, Charge-coupled devices, Control systems, Cameras, Lenses, Stars, Optical fabrication, Sensors

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Showing 5 of 20 publications

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