Results 31 to 40 of about 117,696 (296)

On-sky wide field adaptive optics correction using multiple laser guide stars at the MMT [PDF]

, 2008
We describe results from the first astronomical adaptive optics system to use multiple laser guide stars, located at the 6.5-m MMT telescope in Arizona. Its initial operational mode, ground-layer adaptive optics (GLAO), provides uniform stellar wavefront
Baranec, Baranec, Baranec, Baranec, Boccas, Casali, Christoph Baranec, Craig Kulesa, Don McCarthy, Egner, Ellerbroek, Freed, Gavel, Georges, Gilmozzi, Hinz, Keith Powell, Lloyd-Hart, Lloyd-Hart, Lloyd-Hart, Lloyd-Hart, Marchetti, Martin, McCarthy, Michael Hart, Miguel Snyder, Milton, N. Mark Milton, Pickering, Putnam, Rigaut, Stalcup, Szeto, Thomas Stalcup, Tokovinin, Vaitheeswaran, Velur, Verin, Vidhya Vaitheeswaran, Wildi, Wizinowich   +40 more
core   +2 more sources

Intelligent Optical Systems Using Adaptive Optics [PDF]

Advances in Science and Technology, 2012
Until recently, the phrase adaptive optics generally conjured images of large deformable mirrors being integrated into telescopes to compensate for atmospheric turbulence. However, the development of smaller, cheaper devices has sparked interest for other aerospace and commercial applications.
openaire   +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   +3 more sources

Modeling update for the Thirty Meter Telescope laser guide star dual-conjugate adaptive optics system [PDF]

, 2010
This paper describes the modeling efforts undertaken in the past couple of years to derive wavefront error (WFE) performance estimates for the Narrow Field Infrared Adaptive Optics System (NFIRAOS), which is the facility laser guide star (LGS) dual ...
Ellerbroek, Brent, Gilles, Luc, Wang, Lianqi   +2 more
core   +1 more source

Flow Field Estimation with Distortion Correction Based on Multiple Input Deep Convolutional Neural Networks and Hartmann–Shack Wavefront Sensing

Photonics
The precise estimation of fluid motion is critical across various fields, including aerodynamics, hydrodynamics, and industrial fluid mechanics. However, refraction at complex interfaces in the light path can cause image deterioration and lead to severe ...
Zeyu Gao, Xinlan Ge, Licheng Zhu, Shiqing Ma, Ao Li, Lars Büttner, Jürgen Czarske, Ping Yang   +7 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

Real-time turbulence profiling with a pair of laser guide star Shack–Hartmann wavefront sensors for wide-field adaptive optics systems on large to extremely large telescopes [PDF]

, 2010
Real-time turbulence profiling is necessary to tune tomographic wavefront reconstruction algorithms for wide-field adaptive optics (AO) systems on large to extremely large telescopes, and to perform a variety of image post-processing tasks involving ...
Ellerbroek, B. L., Gilles, L.
core   +1 more source

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

Mode-Voltage Constrained Control for Adaptive Optics System

IEEE Photonics Journal
In the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang, Youming Guo, Nanfei Yan, Ying Yang, Lanqiang Zhang, Qiong Tu, Lingxiao Li, Changhui Rao   +7 more
doaj   +1 more source

Optical calibration and performance of the adaptive secondary mirror at the Magellan telescope

Scientific Reports, 2018
In this paper we describe the procedure for the optical calibration of large size deformable mirrors, acting as wavefront correctors for adaptive optics systems.
Runa Briguglio, Fernando Quirós-Pacheco, Jared R. Males, Marco Xompero, Armando Riccardi, Laird M. Close, Katie M. Morzinski, Simone Esposito, Enrico Pinna, Alfio Puglisi, Lauren Schatz, Kelsey Miller   +11 more
doaj   +1 more source