Wide field adaptive optics laboratory demonstration with closed-loop tomographic control.
HOMER, the new bench developed at ONERA devoted to wide field adaptive optics (WFAO) laboratory research, has allowed the first experimental validations of multi-conjugate adaptive optics (MCAO) and laser tomography adaptive optics (LTAO) concepts with a linear quadratic Gaussian (LQG) control approach. Results obtained in LTAO in closed loop show the significant gain in performance brought by LQG control, which allows tomographic reconstruction. We present a calibration and model identification strategy. Experimental results are shown to be consistent with end-to-end simulations. These results are very encouraging and demonstrate robustness of performance with respect to inevitable experimental uncertainties. They represent a first step for the study of very large telescope (VLT) and extremely large telescopes (ELT) instruments.
Costille
Anne
A
ONERA, DOTA-HRA, B.P. 72, 29 avenue de la Division Leclerc, 92322 Chatillon Cedex, France. anne.costille@obs.ujf-grenoble.fr
Petit
Cyril
C
Conan
Jean-Marc
JM
Kulcsár
Caroline
C
Raynaud
Henri-François
HF
Fusco
Thierry
T