Wavefront Sensing, Active and Adaptive Optics, and Control Systems

Improvements on adaptive optics control approaches: experimental tests of wavefront correction forecasting

[+] Author Affiliations
Dario Del Moro

University of Rome “Tor Vergata,” Department of Physics, Via della Ricerca Scientifica 1, Rome I-00133, Italy

Roberto Piazzesi

University of Rome “Tor Vergata,” Department of Physics, Via della Ricerca Scientifica 1, Rome I-00133, Italy

CNR-Istituto di Fotonica e Nanotecnologie, Via Trasea 7, Padua I-35131, Italy

Marco Stangalini

University of Rome “Tor Vergata,” Department of Physics, Via della Ricerca Scientifica 1, Rome I-00133, Italy

INAF-Osservatorio Astronomico di Roma, Monte Porzio Catone (RM), I-00040, Italy

Luca Giovannelli

University of Rome “Tor Vergata,” Department of Physics, Via della Ricerca Scientifica 1, Rome I-00133, Italy

Francesco Berrilli

University of Rome “Tor Vergata,” Department of Physics, Via della Ricerca Scientifica 1, Rome I-00133, Italy

J. Astron. Telesc. Instrum. Syst. 1(1), 019002 (Dec 02, 2014). doi:10.1117/1.JATIS.1.1.019002
History: Received August 4, 2014; Accepted October 30, 2014
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Abstract.  The FORS (closed loop forecasting system) control algorithm has been already successfully applied to improve the efficiency of a simulated adaptive optics (AO) system. To test its performance in real conditions, we implemented this algorithm in a hardware AO demonstrator, introducing controlled aberrations into the system. We present here the results of introducing into the system both a simple periodic defocus aberration and a real open loop defocus time sequence acquired at the vacuum tower telescope solar telescope. In both cases, FORS yields a significant performance increase, improving the stability of the system in closed-loop conditions and decreasing the amplitude of the residual uncorrected wavefront aberrations.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Dario Del Moro ; Roberto Piazzesi ; Marco Stangalini ; Luca Giovannelli and Francesco Berrilli
"Improvements on adaptive optics control approaches: experimental tests of wavefront correction forecasting", J. Astron. Telesc. Instrum. Syst. 1(1), 019002 (Dec 02, 2014). ; http://dx.doi.org/10.1117/1.JATIS.1.1.019002


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