Dr. Emmanuel Sein Profile

Dr. Emmanuel Sein

Head/Optical Dept at Airbus Defence and Space Satellites

SPIE Involvement:

Author

Proceedings Article | 20 November 2017 Open Access

GAIA payload module mechanical development

S. Touzeau, E. Sein, C. Lebranchu

Proceedings Volume 10564, 105640W (2017) https://doi.org/10.1117/12.2309184

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Proceedings Article | 13 September 2012 Paper

The 3.2m all SiC Telescope for SPICA

Didier Castel, Emmanuel Sein, Sebastien Lopez, Takao Nakagawa, Michel Bougoin

Proceedings Volume 8450, 84502P (2012) https://doi.org/10.1117/12.926891

KEYWORDS: Telescopes, Mirrors, Polishing, Space telescopes, Reflectors, Silicon carbide, Optical benches, Optical instrument design, Reflector telescopes, Manufacturing

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Proceedings Article | 12 October 2004 Paper

The 3.5-m all-SiC telescope for SPICA

Yves Toulemont, Jacques Breysse, Dominique Pierot, Emmanuel Sein, Takao Nakagawa, Hidehiro Kaneda, Takashi Onaka, Masayuki Hirabayashi, Katsuhiro Narasaki, Hironobu Sakuta, Shinji Miura

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551405

KEYWORDS: Telescopes, Mirrors, Polishing, Space telescopes, Reflectors, Silicon carbide, Optical benches, Manufacturing, Wavefronts, Optics manufacturing

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Proceedings Article | 30 September 2004 Paper

A new generation of large SIC telescopes for space applications

Emmanuel Sein, Yves Toulemont, Jacques Breysse, Pierre Deny, Daniel de Chambure, Takao Nakagawa, Masayuki Hirabayashi

Proceedings Volume 5528, (2004) https://doi.org/10.1117/12.563154

KEYWORDS: Space telescopes, Telescopes, Silicon carbide, Mirrors, Reflectors, Manufacturing, Polishing, Optical instrument design, Reflector telescopes, Space mirrors

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Large Space based IR are presently under development. These telescopes are placed on the L2 Lagrangian point and will operate in far infrared range. EADS-ASTRIUM is manugacturing HERSCHEL telescope and will extend its technology to the SPICA Telescope. HERSCHEL operates in the spectral range between 80 and 670 μm wavelength and is devoted to astronomical investigations in the far-infrared, sub-millimetre and millimetre wavelength range. ASTRIUM has been awarded by ESA to manufacture tgeh 3,5m all SiC telescope. The concept for the HERSCEL telescope is based on an axisymetric, 3,5-m-diameter Cassegrain design. The driving requirements are the large diameter (3,5m) especially for the manufacturing aspects, the WFE which has to be kept below 6μrms, the operational temperatuer (70k) which brings distortionas wrt ambient environment, and finally the mass to keep below 300kg. This Development is part of the ESA HERSCHEL PLANK program. SPICA Telescope driving requirements are also the large diameter (3,5m) especially critical for the manufacturing aspects, the WFE which has to be kept below 350nmrms, and the operational temperature (4,5K) which requires to master the distortions wrt ambient environment. Telescope will operate in the 5 to 200 μm wavelength range. ASTRIUM has been awarded by Sumitomo and ISAS to study the faisability of teh 3,5m all SiC telescope. The main features developed in this paper are: The final design and the recent manufacturing developments of the HERSHEL telescope and the expected performances of such a telescope in space environment The preliminary design of the SPICA telescope and teh predicted performances which are taking advantage from the Silicone Carbide properties developed for HERSCHEL telescope, especially considering the homogeneity inside the structure its stability from abient to the operational temperature range (4,5K). The study shows that the Silicone Carbide Telescope design can fulfil the mechanical and optical requirements, in a passive way without actuators.

Proceedings Article | 5 March 2003 Paper

A 3.5m diameter Sic telescope for Herschel mission

Emmanuel Sein, Yves Toulemont, Frederic Safa, Michel Duran, Pierre Deny, Daniel de Chambure, Thomas Passvogel, Goeran Pilbratt

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461804

KEYWORDS: Telescopes, Space telescopes, Silicon carbide, Mirrors, Reflectors, Manufacturing, Reflector telescopes, Polishing, Distortion, Aerospace engineering

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SPIE Conference Volume | 8 April 2003

Sensors, Systems, and Next-Generation Satellites VI

SPIE Conference Volume | 30 September 1994

Space Optics 1994: Space Instrumentation and Spacecraft Optics

Conference Committee Involvement (2)

Sensors, Systems, and Next Generation Satellites VIII

23 September 2002 | Crete, Greece

Space Optics 1994: Space Instrumentation and Spacecraft Optics

17 April 1994 | Garmisch, Germany

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