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.
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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T
Fusco
C
C
Petit
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G
Rousset
J M
JM
Conan
J L
JL
Beuzit