title: Wide field adaptive optics laboratory demonstration with closed-loop tomographic control.
abstract: 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.
authors.affiliation: ONERA, DOTA-HRA, B.P. 72, 29 avenue de la Division Leclerc, 92322 Chatillon Cedex, France. anne.costille@obs.ujf-grenoble.fr
authors.forename: Anne
authors.initials: A
authors.lastname: Costille
authors.forename: Cyril
authors.initials: C
authors.lastname: Petit
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Conan
authors.forename: Caroline
authors.initials: C
authors.lastname: Kulcsár
authors.forename: Henri-François
authors.initials: HF
authors.lastname: Raynaud
authors.forename: Thierry
authors.initials: T
authors.lastname: Fusco