Adaptive imaging through far-field turbulence

Steven E. Troxel; Byron M. Welsh; Michael C. Roggemann

doi:10.1117/12.162014

9 November 1993 Adaptive imaging through far-field turbulence

Steven E. Troxel, Byron M. Welsh, Michael C. Roggemann

Proceedings Volume 2029, Digital Image Recovery and Synthesis II; (1993) https://doi.org/10.1117/12.162014
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

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 C²_n 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.

Citation Download Citation

Steven E. Troxel, Byron M. Welsh, and Michael C. Roggemann "Adaptive imaging through far-field turbulence", Proc. SPIE 2029, Digital Image Recovery and Synthesis II, (9 November 1993); https://doi.org/10.1117/12.162014

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