Results 21 to 30 of about 145,669 (318)

PASSATA - Object oriented numerical simulation software for adaptive optics [PDF]

, 2016
We present the last version of the PyrAmid Simulator Software for Adaptive opTics Arcetri (PASSATA), an IDL and CUDA based object oriented software developed in the Adaptive Optics group of the Arcetri observatory for Monte-Carlo end-to-end adaptive ...
Agapito, G., Esposito, S., Puglisi, A.
core   +2 more sources

Adaptive Optics Tip-Tilt Correction Based on Smith Predictor and Filter-Optimized Linear Active Disturbance Rejection Control Method

Sensors, 2023
A tip-tilt mirror (TTM) control method is designed to enhance the control bandwidth and ensure the rejection performance of the adaptive optics (AO) tip-tilt correction system.
Lingxi Kong, Kangjian Yang, Chunxuan Su, Sicheng Guo, Shuai Wang, Tao Cheng, Ping Yang   +6 more
doaj   +1 more source

ALFA: First Operational Experience of the MPE/MPIA Laser Guide Star System for Adaptive Optics [PDF]

, 1998
The sodium laser guide star adaptive optics system ALFA has been constructed at the Calar Alto 3.5-m telescope. Following the first detection of the laser beacon on the wavefront sensor in 1997 the system is now being optimized for best performance.
Davies, R. I., Eckart, A., Hackenberg, W., Holstenberg, H. -C., Kasper, M., Ott, T., Quirrenbach, A., Rabien, S.   +7 more
core   +3 more sources

Centroid-Predicted Deep Neural Network in Shack-Hartmann Sensors

IEEE Photonics Journal, 2022
The Shack-Hartmann wavefront sensor produces incorrect wavefront measurements when some sub-spots are weak and missing. In this paper, a method is proposed to predict the centroids of these sub-spots for the Shack-Hartmann wavefront sensor based on the ...
Mengmeng Zhao, Wang Zhao, Shuai Wang, Ping Yang, Kangjian Yang, Haiqi Lin, Lingxi Kong   +6 more
doaj   +1 more source

Pupil stabilization for SPHERE's extreme AO and high performance coronagraph system [PDF]

, 2007
We propose a new concept of pupil motion sensor for astronomical adaptive optics systems and present experimental results obtained during the first laboratory validation of this concept.
Beuzit, J. -L., Charton, J., Fusco, T., Jocou, L., Montagnier, G., Mouillet, D.   +5 more
core   +2 more sources

Adaptive Optics for Extremely Large Telescopes

, 2019
Adaptive Optics has become a key technology for the largest ground-based telescopes currently under or close to begin of construction. Adaptive optics is an indispensable component and has basically only one task, that is to operate the telescope at its ...
Hippler, Stefan
core   +1 more source

Design and Experimental Validation of a Model-Free Controller for Beam Stabilization in Adaptive Optics Systems

IEEE Photonics Journal
Stabilization of optical beams has always been a key factor affecting the performance of many optical systems. The Adaptive optics (AO) beam stabilization system requires further development to cope with increasingly complex application scenarios and ...
Sicheng Guo, Tao Cheng, Kangjian Yang, Lingxi Kong, Chunxuan Su, Shuai Wang, Ping Yang   +6 more
doaj   +1 more source

Adaptive Optics for Astronomy

, 2012
Adaptive Optics is a prime example of how progress in observational astronomy can be driven by technological developments. At many observatories it is now considered to be part of a standard instrumentation suite, enabling ground-based telescopes to ...
Arsenault R, Beuzit J-L, Bonaccini Calia D, Davies R, Ellerbroek BL, Ellerbroek BL, Foy R, Frogel J, Gendron E, Hubin N, Jones T, Labeyrie A, Markus Kasper, Merkle F, Merline WJ, Neichel B, Richard Davies, Riffel R, Rigaut F, Rousset G, Tyson RK, Wild V, Wizinowich P   +22 more
core   +1 more source

Robust control of a bimorph mirror for adaptive optics system [PDF]

, 2008
We apply robust control technics to an adaptive optics system including a dynamic model of the deformable mirror. The dynamic model of the mirror is a modification of the usual plate equation. We propose also a state-space approach to model the turbulent
Arzelier, Denis, Baudouin, Lucie, Guignard, Fabien, Prieur, Christophe   +3 more
core   +2 more sources

Optimization of Iterative Control Algorithms for High-Resolution Adaptive Optics Systems

IEEE Photonics Journal
As the number of wavefront sensor subapertures and deformable mirror actuators in adaptive optics systems increases, the computational time of the direct gradient wavefront control algorithm is excessively long, which is a major factor affecting the ...
Shenghu Liu, Wang Zhao, Shuai Wang, Kangjian Yang, Ping Yang, Hongli Guan, Han Guo, Ruifeng He   +7 more
doaj   +1 more source