A re-analysis of short-exposure turbulent effects on passive imaging

David H. Tofsted

doi:10.1117/12.850405

4 May 2010 A re-analysis of short-exposure turbulent effects on passive imaging

David H. Tofsted

Proceedings Volume 7685, Atmospheric Propagation VII; 768504 (2010) https://doi.org/10.1117/12.850405
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

In 1966, D. L. Fried developed a theoretical framework for describing the modulation transfer function (MTF) of optical turbulence effects for short-exposure imaging, thereby extending Hufnagel and Stanley's model for longexposure imaging through turbulence. In his analysis Fried assumed the independence of phase perturbations about the mean tilt factor and this tilt factor. In this reanalysis this assumption is deleted, resulting in a new term in the derivation. This term exhibits several new features, including superresolution at high spatial frequencies under moderate turbulence levels, and turbulence strength dependent degradation of the MTF at high turbulence levels.

Citation Download Citation

David H. Tofsted "A re-analysis of short-exposure turbulent effects on passive imaging", Proc. SPIE 7685, Atmospheric Propagation VII, 768504 (4 May 2010); https://doi.org/10.1117/12.850405

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