Adaptive imaging through far-field turbulence

Details Adaptive imaging through far-field turbulence Adaptive imaging through far-field turbulence

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.2029..369t&link_type=abstract

Proc. SPIE Vol. 2029, p. 369-379, Digital Image Recovery and Synthesis II, Paul S. Idell; Ed.

Physics

Optics

Scientific paper

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 C(superscript 2)(subscript 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.

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