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Proceedings Paper

Adaptive imaging through far-field turbulence
Author(s): Steven E. Troxel; Byron M. Welsh; Michael C. Roggemann
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Paper Abstract

This paper presents a new method for calculating the field angle dependent average OTF of an adaptive optic system and compares this method to calculations based on geometric optics. Geometric optics calculations are shown to be inaccurate due to the diffraction effects created by far-field turbulence and the approximations made in the atmospheric parameters. Our analysis includes diffraction effects and properly accounts for the effect of the atmospheric turbulence scale sizes. We show that for any atmospheric C2n profile, the actual OTF is always better than the OTF calculated using geometric optics. The magnitude of the difference between the calculation methods is shown to be dependent on the amount of far- field turbulence and the values of the outer scale dimension.

Paper Details

Date Published: 9 November 1993
PDF: 11 pages
Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); doi: 10.1117/12.162014
Show Author Affiliations
Steven E. Troxel, Air Force Institute of Technology (United States)
Byron M. Welsh, Air Force Institute of Technology (United States)
Michael C. Roggemann, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 2029:
Digital Image Recovery and Synthesis II
Paul S. Idell, Editor(s)

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