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Digital holography at long-wave infrared for measuring the deformation of large space reflectors under thermal vacuum

par Vandenrijt, Jean-François;Thizy, Cédric;Stockman, Yvan ;Queeckers, Patrick ;Dubois, Frank ;Doyle, Dominic;Georges, Marc
Référence ESA SP, 691 SP
Publication Publié, 2012

Article révisé par les pairs

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Résumé :

Deformation metrology of complex space structures and reflectors is a recurrent problem addressed by ESA. Consequently suitable measurement techniques have to be developed and validated to support relevant on-ground qualification and verification testing. For that purpose a novel infrared digital holographic interferometer has been developed to measure the deformation of space reflectors without considering specific optical and expensive components such as null lenses. Laboratory investigations as well as thermal vacuum measurements have been performed to demonstrate the performances of this newly developed interferometer.