Compensation of atmospheric optical distortion using a synthetic beacon

@article{Primmerman1991CompensationOA,
  title={Compensation of atmospheric optical distortion using a synthetic beacon},
  author={Charles A. Primmerman and Daniel V. Murphy and Daniel A. Page and Byron George Zollars and Herbert T. Barclay},
  journal={Nature},
  year={1991},
  volume={353},
  pages={141-143}
}
ATMOSPHERIC turbulence limits the resolution of a ground-based astronomical telescope to much worse than the diffraction limit of the instrument. An adaptive-optics system, in which some part of the optical train of the telescope can be adjusted in real time, can compensate for atmospheric turbulence, but a beacon or guide-star is needed to allow measurement of the atmospheric optical distortion. It has been suggested1 that the measurement could be achieved by means of a synthetic beacon (also… 
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