Physics – Optics
Scientific paper
May 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976opa..agar.....j&link_type=abstract
In AGARD Opt. Propagation in the Atmosphere 17 p (SEE N76-29815 20-46)
Physics
Optics
Atmospheric Effects, Image Enhancement, Telescopes, Wave Front Reconstruction, Atmospheric Optics, Atmospheric Turbulence, Diffraction Limited Cameras, Optical Correction Procedure, Optical Paths
Scientific paper
The presence of the atmosphere degrades the imaging performance of large telescopes. Optical phase distortion imposed by atmospheric turbulence causes a loss in resolution capability of from 10 to 30 times a system's theoretical performance. A compensated imaging approach is reported which allows the retrieval of low contrast information by active adaptation of the telescope system to atmospheric conditions. This is accomplished through the use of real time wavefront sensing coupled with fast response deformable optics. In practice, the wavefront entering the telescope is measured to determine its wavefront deformation (optical path length difference across the aperture) and a mirror is then deformed to the conjugate of the deformations, producing a near diffraction limited image on a sensor. Analysis of the wavefront correction capabilities has been completed.
Justice J. W.
Urtz P. Jr. R.
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