Closed-loop experimental validation of the spatially filtered Shack-Hartmann concept |
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Authors: | Fusco T Petit C Rousset G Conan J M Beuzit J L |
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Institution: | Office National d'Etudes et de Recherche Aerospatiales, Département d'Optique Théorique et Appliquée, 29 Avenue de la Division Leclerc, 92322 Chatillon Cedex, France thierry.fusco@onera.fr |
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Abstract: | An experimental validation of the spatially filtered Shack-Hartmann concept (F-SH) is presented that allows aliasing effects to be decreased. This effect is studied by use of an adaptive optical testbed with a focal plane pinhole in front of the wave-front sensor. First, the ability to close the loop on turbulence is demonstrated. Then the performance gain conferred by the device is quantified and compared with end-to-end simulation results. Another property of the F-SH concept, i.e., the reduction of the waffle modes, is highlighted. |
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