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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 4 — Feb. 1, 2012
  • pp: A11–A16

Time-average Fourier telescopy: a scheme for high-resolution imaging through horizontal-path turbulence

William T. Rhodes  »View Author Affiliations

Applied Optics, Vol. 51, Issue 4, pp. A11-A16 (2012)

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The problem of high-resolution imaging through long horizontal-path ground-level turbulence has gone unsolved since it was first addressed many decades ago. In this paper I describe a method that shows promise for diffraction-limited imaging through ground-level turbulence with large (meters) apertures and at large (kilometers) distances. The key lies in collecting image data in the spatial frequency domain via the method of Fourier telescopy and taking suitable time averages of the magnitude and phase of the Fourier telescopy signal. The method requires active illumination of the target with laser light, and the time averages required will likely be over many tens of seconds if not tens of minutes or more. The scheme will thus not be suitable for time-varying scenes. The basic scheme is described, and principle challenges briefly discussed.

© 2012 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(110.0110) Imaging systems : Imaging systems
(110.0113) Imaging systems : Imaging through turbid media
(010.0280) Atmospheric and oceanic optics : Remote sensing and sensors

Original Manuscript: November 9, 2011
Manuscript Accepted: December 16, 2011
Published: January 26, 2012

William T. Rhodes, "Time-average Fourier telescopy: a scheme for high-resolution imaging through horizontal-path turbulence," Appl. Opt. 51, A11-A16 (2012)

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  12. Light bucket is a colloquial expression for a flux collecting detector designed solely to collect radiation with no attempt made to form an image.
  13. S. R. Silva and W. T. Rhodes are preparing a manuscript to be called “Sinusoidal motion of Young’s fringes for Fourier telescopy tests.”
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  19. D. Pava and W. T. Rhodes are preparing a manuscript to be called “Spatio-temporal non-redundant arrays for Fourier telescopy applications.”

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