Powerful laser guide star system at the Paranal Observatory.The actual laser guide star is the small spot above the apparent end of the laser beam.
A laser guide star is an artificial star image created for use in astronomical adaptive optics systems, which are employed in large telescopes in order to correct atmospheric distortion of light (called astronomical seeing). Adaptive optics (AO) systems require a wavefront reference source of light called a guide star. Natural stars can serve as point sources for this purpose, but sufficiently bright stars are not available in all parts of the sky, which greatly limits the usefulness of natural guide star adaptive optics. Instead, one can create an artificial guide star by shining a laser into the atmosphere. Light from the beam is reflected by components in the upper atmosphere back into the telescope. This star can be positioned anywhere the telescope desires to point, opening up much greater amounts of the sky to adaptive optics.
Because the laser beam is deflected by astronomical seeing on the way up, the returning laser light does not move around in the sky as astronomical sources do. In order to keep astronomical images steady, a natural star nearby in the sky must be monitored in order that the motion of the laser guide star can be subtracted using a tip-tilt mirror. However, this star can be much fainter than is required for natural guide star adaptive optics because it is used to measure only tip and tilt, and all higher-order distortions are measured with the laser guide star. This means that many more stars are suitable, and a correspondingly larger fraction of the sky is accessible.
A laserguidestar is an artificial star image created for use in astronomical adaptive optics systems, which are employed in large telescopes in order...
natural guidestar to use adaptive optics, so various methods to create artificial laserguide stars have been developed, including the sodium laser system...
ablated object. Using a laserguidestar and adaptive optics, a sufficiently large ground-based laser (1 megajoule pulsed HF laser) can offset the orbits...
ranging" or "laser imaging, detection, and ranging") is a method for determining ranges by targeting an object or a surface with a laser and measuring...
use of a laser beam to generate a reference light source (a laserguidestar, LGS) in the atmosphere. There are two kinds of LGSs: Rayleigh guide stars and...
massive objects. A few observatories have been constructed, such as the Laser Interferometer Gravitational Observatory LIGO. LIGO made its first detection...
used for a certain type of guidestarlaser deployed at US Air Force Research Laboratory facilities SOR and AMOS. The laser light is produced in a sum-frequency...
VLT and VISTA (background) The platform as night sets Beam of the laserguidestar facility at VLT's Yepun Unit Time-lapse taken at Paranal, showing the...
secondary mirror. The telescope will be supported by adaptive optics, six laserguidestar units, and multiple large science instruments. The observatory's design...
computer game company La Grande Sophie, a French singer-songwriter Laserguidestar, an adaptive optics instrument used in Astronomy Leaky gut syndrome...
A laser weapon is a type of directed-energy weapon that uses lasers to inflict damage. Despite decades of research and development, as of 2023[update]...
with laser beam integrity over distances. Lasers are being used for long-distance high-bandwidth communications and accuracy in air-to-air laser connectivity...
world-leading performance in optical and near-infrared astronomy, including laserguide stars, adaptive optics, multi conjugate adaptive optics, and multi-object...
Observatory Teide National Park Very Large Telescope "First Light for LaserGuideStar Technology Collaboration". European Southern Observatory. Retrieved...
sodium layer to be useful for creating an artificial laserguidestar in the upper atmosphere. The star is used by adaptive optics to compensate for movements...
around 90 to 100 km of elevation, which could be lit by a laser beam to make an artificial guidestar. His idea was tested successfully by DARPA but classified...
original on 31 May 2008. Retrieved 21 January 2010. "First Light for LaserGuideStar Technology Collaboration". European Southern Observatory. Archived...
appear as soft visual patches known as star clouds. The most conspicuous of these is the Large Sagittarius Star Cloud, a portion of the central bulge of...
Canada France Hawaii Telescope to the WHT and to equip the WHT with a laserguide-star, to participation in studies for possible integral-field units on the...
adaptive optics to correct atmospheric distortion ARGOS – multiple laserguidestar unit capable of supporting ground layer or multi conjugate adaptive...
light adaptive optics system and later in 1997, it hosted the UnISIS, laserguidestar adaptive optics system. As the use of the telescope for scientific...
The Plymouth Laser is a two-door 2+2 sports coupe sold by Plymouth from 1989 until 1994. The Laser and its siblings, the Mitsubishi Eclipse and Eagle...
Stomski, P.; Summers, D.; Wizinowich, P. (2005). "Keck Observatory LaserGuideStar Adaptive Optics Discovery and Characterization of a Satellite to the...
of lasers include laser printers and laser pointers. Lasers are used in medicine in areas such as bloodless surgery, laser eye surgery, and laser capture...
and Yepun (Evening Star), respectively. Originally there was some confusion as to whether Yepun actually stands for the evening star Venus, because a Spanish-Mapuche...
Stomski; D. Summers; P. Wizinowich (2 September 2005). "Keck Observatory LaserGuideStar Adaptive Optics Discovery and Characterization of a Satellite to the...
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