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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 27 — Sep. 20, 2011
  • pp: 5303–5309

Long-exposure filtering of turbulence-degraded wavefronts

James A. Gordon, David F. Buscher, and Fabien Baron  »View Author Affiliations

Applied Optics, Vol. 50, Issue 27, pp. 5303-5309 (2011)

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The quasi-static aberrations of optical telescopes are often determined using light from a star as the reference wavefront. We calculate the exposure time necessary to determine the amplitude of the phase aberrations for a given telescope to a given accuracy in the presence of atmospheric seeing. We implement a computational simulation of the atmosphere and present the root mean square of the generated wavefront Zernike amplitudes for a given exposure time. We find the exposure time τ required to reach a desired precision is strongly dependent on telescope diameter ( τ D 8 / 3 ) and can be many tens of minutes in extreme cases. We present the results so τ can be calculated for a range of telescopes and atmospheric parameters.

© 2011 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7060) Atmospheric and oceanic optics : Turbulence
(110.1220) Imaging systems : Apertures
(220.1010) Optical design and fabrication : Aberrations (global)

ToC Category:
Atmospheric and Oceanic Optics

Original Manuscript: May 15, 2011
Manuscript Accepted: July 25, 2011
Published: September 16, 2011

James A. Gordon, David F. Buscher, and Fabien Baron, "Long-exposure filtering of turbulence-degraded wavefronts," Appl. Opt. 50, 5303-5309 (2011)

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