Physics – Optics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976opa..agars....m&link_type=abstract
In AGARD Opt. Propagation in the Atmosphere 17 p (SEE N76-29815 20-46)
Physics
Optics
Atmospheric Attenuation, Optical Correction Procedure, Telescopes, Wave Front Reconstruction, Atmospheric Optics, Atmospheric Turbulence, Computerized Simulation, Image Enhancement
Scientific paper
The earth's turbulent atmosphere severely limits the resolution of conventional ground based telescopes. Methods of reducing this limitation for ground based telescopes include post detection processing in which the blurred recorded image is processed to extract information not discernable to the human visual system, and pre-detection compensation in which the wave front deformations are dynamically corrected in the optical system before the image is recorded. Computer simulations of both of these methods are presented. The simulations demonstrate that the post detection processing method produces only moderate improvement in resolution due to signal to noise limitations while the pre-detection method gives very significant improvements. As a part of the simulations, techniques of generating instantaneous realizations of wave fronts deformed by atmospheric turbulence and their corresponding point spread functions are presented.
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