22 July 2016 Final design of the grism cryogenic mount for the Euclid-NISP mission
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Abstract
The grism mount design for the Euclid-NISP mission was studied to maintain optical performances and alignment at cryogenic temperature, and to survive to launch vibrations. An Invar mount with strong weight-relief bonded to the Silica grism through tangential blades has been designed. In spring 2015 we proceeded to thermal cycling and vibration tests to successfully qualify the Grism Engineering Model in the Euclid space environment. Thanks to detailed Finite Element analyses, we correlated simulations and tests. Now that phase C began, we are manufacturing the Engineering and Qualification Model and the four Flight Models. Thus, random coupled analyses of the grisms on the complete wheel assembly and impact of interface preloads on the grism behavior have also been studied.
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Christelle Rossin, Christelle Rossin, Anne Costille, Anne Costille, Amandine Caillat, Amandine Caillat, Sandrine Pascal, Sandrine Pascal, Patrice Sanchez, Patrice Sanchez, Benjamin Foulon, Benjamin Foulon, Sebastien Vives, Sebastien Vives, Lorenzo Zavattini, Lorenzo Zavattini, Andrea Moroni, Andrea Moroni, Paolo Radaelli, Paolo Radaelli, "Final design of the grism cryogenic mount for the Euclid-NISP mission", Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991261 (22 July 2016); doi: 10.1117/12.2232293; https://doi.org/10.1117/12.2232293
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