Visualizing the effects of distributed volume Non-Kolmogorov and anisotropic turbulence on incoherent long horizontal-path imaging

Jeremy P. Bos; V. S. Rao Gudimetla

doi:10.1117/12.2062086

3 October 2014 Visualizing the effects of distributed volume non-Kolmogorov and anisotropic turbulence on incoherent long horizontal-path imaging

Jeremy P. Bos, V. S. Rao Gudimetla

Author Affiliations +

Proceedings Volume 9224, Laser Communication and Propagation through the Atmosphere and Oceans III; 92240K (2014) https://doi.org/10.1117/12.2062086
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

Video imagery is extremely useful in developing an intuitive sense for the effects of atmospheric turbulence in long, horizontal-path imaging. This is especially true when attempting to understand the effects of Non-Kolmogorov and anisotropic turbulence. We have created simulated video sequences featuring a static scene where parameters such as turbulence strength, power-law exponent, direction and degree of anisotropy are varied. Because these image sequences are simulated, it is possible to explore the effects of these parameters using non-subjective measures such as the Mean Squared Error. We find that changing the power-law exponent while leaving the Fried parameter fixed results in more blurring but less anisoplantic tip-tilt distortions at lower power laws. Images have subjectively less blurring and more global tip-tilt distortion when the power law is higher than the Kolmogorov value. We also observe that Mean Squared Error increases approximately linearly with the degree of anisotropy.

Citation Download Citation

Jeremy P. Bos and V. S. Rao Gudimetla "Visualizing the effects of distributed volume non-Kolmogorov and anisotropic turbulence on incoherent long horizontal-path imaging", Proc. SPIE 9224, Laser Communication and Propagation through the Atmosphere and Oceans III, 92240K (3 October 2014); https://doi.org/10.1117/12.2062086

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