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Atmospheric and Oceanic Optics

2018 year, number 2

Digital compensation of turbulent distortions of incoherent optical images using multiaperture systems

V.V. Dudorov, A.S. Eremina
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: многоапертурные системы наблюдения, турбулентная атмосфера, компьютерная обработка изображений, multiaperture systems, turbulent atmosphere, computational imaging


Possibilities of enhancement of the operational efficiency of optical multiaperture systems in a turbulent atmosphere are studied in numerical simulation. Features of the synthesis of an object image as a sum (superposition) of images from every individual aperture are analyzed under the presence of turbulent distortions. The quality of images synthesized by a matrix of N ´ N subapertures ( N = 5-10) is analyzed. It is shown that turbulent distortions in an image synthesized with the use of many subapertures accounting shifts of subimages at each subaperture are isoplanar in a wide range of atmospheric conditions. This allows significant improvement of the image quality by means of computer correction. In this case, there is an optimal subaperture size mainly determined by the Fried parameter, which characterizes the degree of turbulent distortions.