Ms. Mailys Thorigny Profile

Mailys Thorigny

at Thales SESO S.A.S.

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Publications (3)

Proceedings Article | 11 June 2021 Open Access

Thales SESO silver coatings for space programs

Patrick Robert, Christian Du Jeu, Cédric Cammarata, Mailys Thorigny, Karine Mathieu, Mattieu Tatat, Vincent Costes, Fabrice Champandard, Aurélien Suau, Guillaume Briche, Jean-François Blanc

Proceedings Volume 11852, 118524M (2021) https://doi.org/10.1117/12.2599795

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Proceedings Article | 11 June 2021 Open Access

Cryogenic optics for space applications

Natacha Cocheteau, Julien Basile, Bruno Delaborde, Matthieu Gilles, Patrick Robert, Mailys Thorigny

Proceedings Volume 11852, 118522F (2021) https://doi.org/10.1117/12.2599378

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Proceedings Article | 11 June 2021 Open Access

Improvement of molecular adhesion for spatial applications at Thales SESO over the past 20 years

Natacha Cocheteau, Christian Du Jeu, Alizee Loarer, Patrick Robert, Mailys Thorigny

Proceedings Volume 11852, 118521N (2021) https://doi.org/10.1117/12.2599287

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Molecular adhesion is a well-known process used on terrestrial optics and other fields. This process consists in joining two surfaces without the use of any adhesive or additional material. Molecular adhesion is a high-precision production process, and assemblies obtained present a dimensional stability due to the absence of mechanical part or glue. In addition, since no adhesive materials are used in this process, the risks of contamination associated with degassing are avoided. Based on this benefits, this process is of particular interest for optical system manufacturing for spatial applications. For over the past 20 years, Thales SESO develop its own process of molecular adhesion. For example among others, it has been applied on the manufacturing of Fabry-Perot interferometers. Such as fused silica Fabry-Perot for ALADIN program in the frame of AEOLUS mission (launched in August 2018) or fused silica/Zerodur® Fabry-Perot for ATLID program. Both interferometer have under vacuum cavity. On the ATLID Fabry-Perot the sealing is also made using molecular adhesion. Back then, the molecular adhesion mechanical strength admissible was around 1 MPa. Then, Thales SESO improve its molecular adhesion process - through lots of collaborations with CNES and other partners – in order to be able to bond more complex designs and increase the mechanical resistance. Today the molecular adhesion mechanical strength admissible has been multiplied by a factor five. Those improvement have been applied in the frame of the Third Generation Meteorological satellite (MTG-IRS) for the manufacturing of corner cubes in accordance with the mechanical and thermal environments of a geostationary orbit coupled with very strict optical performances. Today, several corner cubes have been manufactured, and the strength of adhered bond have been demonstrated in terms of thermal, shock and random solicitations through mechanical qualifications. The major advantage of molecular adhesion for the corner cube application is the stability of the WFE under vacuum – which have been also demonstrated. Here, an overview of the Thales SESO realizations starting from Fabry-Perot first results to the latest results on corner cubes performances as well as the future of molecular adhesion for space applications imagined by Thales SESO.

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