Dr. Grégory P. Lousberg Profile

Dr. Grégory P. Lousberg

System Engineering Manager at AMOS AS

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

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

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

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

Read Abstract +

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

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

Read Abstract +

Proceedings Article | 25 August 2022 Presentation + Paper

Presentation + Paper

Mount Abu 2.5m Telescope: first light and performance assessment

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

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

Read Abstract +

Proceedings Article | 11 June 2021 Open Access

Open Access

Presentation + Paper

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

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

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

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Proceedings Article | 14 January 2021 Poster + Paper

Poster + Paper

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

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

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

Read Abstract +

Proceedings Article | 12 July 2018 Paper

Paper

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

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

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

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Mt ABU 2.5m Telescope: design and fabrication

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

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

Presentation + Paper

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

A. Marín-Franch, A. Ederoclite, A. Yanes-Díaz, D. Cristóbal-Hornillos, J. Varela, H. Vázquez Ramió, N. Lasso-Cabrera, C. Íñiguez, S. Rueda-Teruel, F. Rueda-Teruel, R. Bello, J.-L. Antón-Bravo, M. Moles, G. López-Alegre, 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. J. Cenarro, S. Chueca, A. López-Sáinz, C. Bastin, G. Lousberg, 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

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

Paper

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

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

Read Abstract +

Proceedings Article | 17 November 2017 Open Access

Open Access

Paper

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

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

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

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, A. Javier Cenarro, Héctor Ramió

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

Paper

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

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

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

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

Paper

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

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

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

Read Abstract +

Proceedings Article | 23 September 2015 Paper

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

Read Abstract +

Proceedings Article | 22 July 2014 Paper

Paper

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

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

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

Read Abstract +

Proceedings Article | 17 September 2012 Paper

Paper

OAJ: 2.6m wide field survey telescope

Vincent Moreau, Olivier Pirnay, 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 19 publications

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