High Resolution Imaging Testbed Utilizing Sodium Laser Guide Star Adaptive Optics: The Real Time Wavefront Reconstructor Computer

2008 ◽  
Author(s):  
Richard G. Dekany ◽  
Antonin H. Bouchez
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Adaptive Optics ◽  
High Resolution Imaging ◽  
Laser Guide Star ◽  
The Real ◽  
Resolution Imaging ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

scholarly journals Statistics of the sodium layer parameters at low geographic latitude and its impact on adaptive-optics sodium laser guide star characteristics

2010 ◽  
Vol 511 ◽  
pp. A31 ◽  
Author(s):  
N. Moussaoui ◽  
B. R. Clemesha ◽  
R. Holzlöhner ◽  
D. M. Simonich ◽  
D. Bonaccini Calia ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Geographic Latitude ◽  
Sodium Layer ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

The Four-Laser Guide Star Facility: Design considerations and system implementation

2014 ◽  
Vol 3 (3) ◽  
Author(s):  
Domenico Bonaccini Calia ◽  
Wolfgang Hackenberg ◽  
Ronald Holzlöhner ◽  
Steffan Lewis ◽  
Thomas Pfrommer
Keyword(s):  
Adaptive Optics ◽  
Technical Solution ◽  
Laser Guide Star ◽  
Laser Guide Stars ◽  
Very Large Telescope ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Optical Telescopes ◽  
Atmospheric Seeing

AbstractGround-based optical telescopes, in particular large ones, require adaptive optics to overcome the atmospheric seeing limit due to turbulence. Correcting the distorted wavefront necessitates bright stars in the field of view. The sky coverage can be greatly increased by using artificial sodium laser guide stars in addition to natural guide stars. We describe the underlying physics and technical considerations relevant to such systems before discussing the design of the four-laser guide star facility (4LGSF) which is currently under development for the ESO Very Large Telescope (VLT) on Cerro Paranal, Chile. The focus is upon the justification of the requirements and their technical solution.

scholarly journals Rapid Diagnosis of Tuberculosis by Real-Time High-Resolution Imaging of Mycobacterium tuberculosis Colonies

2015 ◽  
Vol 53 (8) ◽  
pp. 2693-2696 ◽  
Author(s):  
Ramzi Ghodbane ◽  
Shady Asmar ◽  
Marlena Betzner ◽  
Marie Linet ◽  
Joseph Pierquin ◽  
...  
Keyword(s):  
Mycobacterium Tuberculosis ◽  
High Resolution ◽  
Real Time ◽  
Solid Medium ◽  
Contamination Rate ◽  
High Resolution Imaging ◽  
Standard Protocol ◽  
Content Type ◽  
The Real ◽  
Resolution Imaging

Culture remains the cornerstone of diagnosis for pulmonary tuberculosis, but the fastidiousness ofMycobacterium tuberculosismay delay culture-based diagnosis for weeks. We evaluated the performance of real-time high-resolution imaging for the rapid detection ofM. tuberculosiscolonies growing on a solid medium. A total of 50 clinical specimens, including 42 sputum specimens, 4 stool specimens, 2 bronchoalveolar lavage fluid specimens, and 2 bronchial aspirate fluid specimens were prospectively inoculated into (i) a commercially available Middlebrook broth and evaluated for mycobacterial growth indirectly detected by measuring oxygen consumption (standard protocol) and (ii) a home-made solid medium incubated in an incubator featuring real-time high-resolution imaging of colonies (real-time protocol). Isolates were identified by Ziehl-Neelsen staining and matrix-assisted laser desorption ionization–time of flight mass spectrometry. Use of the standard protocol yielded 14/50 (28%)M. tuberculosisisolates, which is not significantly different from the 13/50 (26%)M. tuberculosisisolates found using the real-time protocol (P= 1.00 by Fisher's exact test), and the contamination rate of 1/50 (2%) was not significantly different from the contamination rate of 2/50 (4%) using the real-time protocol (P= 1.00). The real-time imaging protocol showed a 4.4-fold reduction in time to detection, 82 ± 54 h versus 360 ± 142 h (P< 0.05). These preliminary data give the proof of concept that real-time high-resolution imaging ofM. tuberculosiscolonies is a new technology that shortens the time to growth detection and the laboratory diagnosis of pulmonary tuberculosis.

Recent development in real-time control system of Subaru adaptive optics including laser guide star mode

2010 ◽  
Author(s):  
Masayuki Hattori ◽  
Stephen Colley ◽  
Vincent Garrel ◽  
Sebastian Egner ◽  
Taras Golota ◽  
...  
Keyword(s):  
Control System ◽  
Real Time ◽  
Adaptive Optics ◽  
Laser Guide Star ◽  
Real Time Control ◽  
Time Control ◽  
Guide Star ◽  
Laser Guide

scholarly journals A sodium laser guide star facility for the ANU/EOS space debris tracking adaptive optics demonstrator

2014 ◽  
Author(s):  
Celine D'Orgeville ◽  
Francis Bennet ◽  
Mark Blundell ◽  
Rod Brister ◽  
Amy Chan ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Space Debris ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser

A Hybrid Pulsed Rayleigh-sodium Laser Guide Star Adaptive Optics System for Strong Turbulence Observations

2019 ◽  
Vol 131 (1005) ◽  
pp. 114501
Author(s):  
Keran Deng ◽  
Kai Wei ◽  
Kai Jin ◽  
Ruoxi Dong ◽  
Min Li ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Strong Turbulence ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Adaptive Optics System

scholarly journals First light for the sodium laser guide star adaptive optics system on the Lijiang 1.8m telescope

2016 ◽  
Vol 16 (12) ◽  
pp. 183 ◽  
Author(s):  
Kai Wei ◽  
Min Li ◽  
Shan-Qiu Chen ◽  
Yong Bo ◽  
Feng Chen ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Sodium Laser ◽  
Adaptive Optics System
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