26 June 2017 Deformation measurements by ESPI of the surface of a heated mirror and comparison with numerical model
Author Affiliations +
Abstract
The manufacture of mirrors for space application is expensive and the requirements on the optical performance increase over years. To achieve higher performance, larger mirrors are manufactured but the larger the mirror the higher the sensitivity to temperature variation and therefore the higher the degradation of optical performances. To avoid the use of an expensive thermal regulation, we need to develop tools able to predict how optics behaves with thermal constraints. This paper presents the comparison between experimental surface mirror deformation and theoretical results from a multiphysics model. The local displacements of the mirror surface have been measured with the use of electronic speckle pattern interferometry (ESPI) and the deformation itself has been calculated by subtracting the rigid body motion. After validation of the mechanical model, experimental and numerical wave front errors are compared.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fabian Languy, Jean-François Vandenrijt, Philippe Saint-Georges, Marc P. Georges, "Deformation measurements by ESPI of the surface of a heated mirror and comparison with numerical model", Proc. SPIE 10329, Optical Measurement Systems for Industrial Inspection X, 103291M (26 June 2017); doi: 10.1117/12.2270258; https://doi.org/10.1117/12.2270258
PROCEEDINGS
12 PAGES


SHARE
Back to Top