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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 12, Iss. 11 — Nov. 1, 1995
  • pp: 2517–2522

Influence of stratospheric turbulence on infrared imaging

A. S. Gurvich and M. S. Belen’kii  »View Author Affiliations


JOSA A, Vol. 12, Issue 11, pp. 2517-2522 (1995)
http://dx.doi.org/10.1364/JOSAA.12.002517


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Abstract

We introduce a model for the power spectrum of stratospheric turbulence that is based on data from in situ measurements and on results of the theory of saturated internal gravity waves. We then study the effect of that stratospheric turbulence on the scintillation and the coherence of starlight and on the degradation of star image. It is shown that, because the stratospheric phase structure function is approximately quadratic over a distance comparable with the aperture of a large telescope, stratospheric turbulence does not significantly degrade short-exposure images of star but does degrade long-exposure ones. The influence of stratosphere on star image degradation is more important in the IR than in the visible range because of the specific dependence of the stratospheric coherence radius on the light wavelength. Star image motion and blurring are determined by different characteristics of the atmosphere and cannot be explained solely on the basis of the Kolmogorov model. The modified astronomical imaging theory predicts greater improvement in resolution as the result of tilt removal than does a conventional theory.

© 1995 Optical Society of America

History
Original Manuscript: December 8, 1994
Revised Manuscript: April 3, 1995
Manuscript Accepted: June 9, 1995
Published: November 1, 1995

Citation
A. S. Gurvich and M. S. Belen’kii, "Influence of stratospheric turbulence on infrared imaging," J. Opt. Soc. Am. A 12, 2517-2522 (1995)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-12-11-2517

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