Analysis of marine atmospheric turbulence effects on infrared imaging system by angle of arrival fluctuations |
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| Institution: | 1. National and Local Joint Engineering Research Center of Space Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China;2. College of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China;3. College of Glasgow, University of Electronic Science and Technology of China, Chengdu 611731, China;1. VSB–Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Department of Telecommunications, 17. listopadu 15/2172, Ostrava-Poruba, Czech Republic;2. VSB–Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Department of Cybernetics and Biomedical Engineering, 17. listopadu 15/2172, Ostrava-Poruba, Czech Republic;1. Departamento de Ingenierí Eléctrica, Universidad de Concepción, Casilla 160-C, Concepción, Chile;2. Escuela de Ingeniería Eléctrica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2147, Valparaíso 23-62804, Chile |
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| Abstract: | For the long-range infrared imaging system, the marine atmospheric turbulence degrades seriously the probability of object recognition and tracking. In this study, the angle of arrival fluctuations of an optical wave, which describes the distortion effects of marine atmospheric turbulence on an infrared optical imaging system, is investigated in detail both analytically and numerically. Analytic expressions of the angle of arrival fluctuations are derived for optical plane and spherical waves propagating through weak marine atmospheric turbulence with horizontal path, and they consider simultaneously finite turbulence inner scale, turbulence outer scale, wavelength, and aperture diameters. Numerical calculations are conducted to analyze the influence of marine weak turbulence on the infrared imaging. The results are useful for understanding the potential impact of deviations from the terrestrial turbulence. |
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| Keywords: | Marine atmospheric turbulence Maritime power spectrum Angle of arrival fluctuations |
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