Closed-loop experimental validation of the spatially filtered Shack-Hartmann concept.
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.
Fusco
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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
Petit
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C
Rousset
G
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Conan
J M
JM
Beuzit
J L
JL