Results 241 to 250 of about 504,859 (272)

Fizeau beam-combination for optical astronomy: piston retrieval

SPIE Proceedings, 2003
The field of view for the first generation VLTI instruments (VINCI, MIDI, AMBER etc.) is limited to the diffraction limited beam of a single telescope (for a 8.2-meter telescope at 2-micron this is 0.6 arcseconds). However, the VLTI infrastructure with its main delay lines, transfers a 2 arcseconds beam from the telescopes to the interferometric ...
Eric J. Bakker, Rudolf S. Le Poole
openaire   +2 more sources

Piston error correction of sparse aperture systems using the metaheuristic stochastic parallel gradient descent algorithm.

Applied Optics, 2020
The next generation of optical telescopes will provide high-resolution imaging of celestial objects by using the aperture synthesis technique. To preserve the quality of the image, fast corrections of the pistons among subapertures have to be applied ...
Kaiyuan Yang, Zongliang Xie, Haotong Ma, Hongyi Hu, Bo Qi, Jianliang Shi, Qiang Wang, Wenyi Lv   +7 more
semanticscholar   +1 more source

The Giant Magellan Telescope’s high contrast adaptive optics testbed: NGAO wavefront sensing and control laboratory results

Astronomical Telescopes + Instrumentation
The Natural Guide-star Adaptive Optics (NGAO) mode of the Giant Magellan Telescope (GMT) is one of the two diffraction-limited AO modes under development by GMTO and its partner institutions.
F. Quirós-Pacheco, A. Bouchez, C. Plantet, Bo Xin, Jordi Molgó, William Schoenell, Alfio T. Puglisi, Fabio Rossi, Patricio Schurter, J. Haddad, R. Demers, Simone Esposito, A. Cheffot, Nicolò Azzaroli, L. Carbonaro, T. Lapucci, E. Pinna, Laird M. Close, S. Haffert, M. Kautz, J. Males, Avalon Mcleod, A. Hedglen, V. Gasho, Marcos A. van Dam   +24 more
semanticscholar   +1 more source

Model driven-based extended target piston sensing for optical synthesis aperture imaging system

Applied Optics and Photonics China
The next generation of Earth observation on-orbit optical telescopes will provide high-resolution imaging of complex scene by using the aperture synthesis technique. Fast correction of pistons among each subaperture is the critical factor to preserve the
Kaiyuan Yang, Xiafei Ma, Haotong Ma, Zongliang Xie   +3 more
semanticscholar   +1 more source

The MICADO first light imager for the ELT: starting manufacturing of the relay optics

Astronomical Telescopes + Instrumentation
MICADO is the Multi-AO Imaging Camera for Deep Observations, a first light instrument for the Extremely Large Telescope (ELT). The instrument will be assisted by a Single-Conjugate Adaptive Optics (SCAO) system and the Multiconjugate adaptive Optics ...
S. Barboza, André Boné, R. Rohloff, Friedrich Müller, R. Hofferbert, José Ramos, J. Pott, Norbert Münch, Armin Böhn, Tobias Stadler, Tobias Maurer, P. Bizenberger, David Serrano, Wolfram Schlossmacher, Helmut Espig, James Mulherin, Christopher Hall, Michael DeMarco   +17 more
semanticscholar   +1 more source

Modeling of the optical piston: Density-wave shape and resonance-fluorescence effects

Physical Review A, 1988
We present results of a numerical model of the optical piston driven by laser-induced drift (LID). The model is based on a drift-velocity formulation of Lawandy, derived from an asymmetric-random-walk argument, and includes resonance-fluorescence effects. The model is applied primarily to the experimental conditions of H. G. C.
M.T. Perkins, D. Frezzo, Nabil M. Lawandy, Joseph M. Calo   +3 more
openaire   +3 more sources

Adaptive optics development at the Giant Magellan Telescope: recent progress

Astronomical Telescopes + Instrumentation
In the past two years significant forward progress has been achieved in development of Adaptive Optics sensing and control technology needed for the observation modes of the Giant Magellan Telescope1.
R. Demers, F. Quirós-Pacheco, Patricio Schurter, Bo Xin, J. Haddad, Jordi Molgó, William Schoenell, Rod Conan, Rodrigo Romano, A. Bouchez, Marcos A. van Dam, Daniel Catropa, J. Kansky, Brian Mcleod, S. McMuldroch, William Podgorski, Mark Witinski, Laird M. Close, V. Gasho, S. Haffert, A. Hedglen, M. Kautz, J. Males, C. Plantet, Alfio T. Puglisi, Fabio Rossi, A. Cheffot, Nicolò Azzaroli, L. Carbonaro, T. Lapucci, E. Pinna, Simone Esposito, C. d’Orgeville, Noelia Mart́ınez Rey, T. Travouillon, B. Nemati, Guillermo Gonzalez, Joel Nissen   +37 more
semanticscholar   +1 more source

Analysis of piston error of an optical sparse-aperture imaging system

SPIE Proceedings, 2009
With the development of Earth and Space missions, the quest for higher spatial resolution for telescopes will turn into urgent need. Optical sparse-aperture system can be designed to obtain high resolution in astronomical object imaging with several independent small-aperture telescopes.
Yuhong Wan, Shiquan Tao, Zhuqing Jiang, Zhiwei Zhou, Juan Zhao, Dayong Wang   +5 more
openaire   +2 more sources

Software development and integration of an adaptive-optics testbed using the Giant Magellan Telescope software frameworks

Astronomical Telescopes + Instrumentation
The Giant Magellan Telescope (GMT) is a next-generation ground-based segmented telescope. In the last few years, significant progress has been made by the GMT team and partners to design a natural guide-star wavefront control strategy that can reliably ...
Jordi Molgó, William Schoenell, J. Filgueira, F. Quirós-Pacheco, Alfio T. Puglisi, Fabio Rossi, T. Lapucci, A. Bouchez, Bo Xin, Patricio Schurter, R. Demers, Laird M. Close, S. Haffert, M. Kautz, J. Males, Marianne Cox, José Soto, Chien Peng, Hector Swett, Chris Contaxis, Jorge Barrios, Gibreel El-Halabi, Paulo H. Silva   +22 more
semanticscholar   +1 more source

Piston sensing for a segmented mirror system via a digital dispersed fringe generated by wavelength tuning.

Optics Letters, 2020
A dispersed fringe sensor (DFS) is a promising approach for sensing the large-scale piston error for segmented mirror systems. In this Letter, a novel method, to the best of our knowledge, for piston sensing based on a digital dispersed fringe (DDF ...
Yongfeng Zhang, H. Xian
semanticscholar   +1 more source