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15 June 1995 Short-exposure imaging of coherently illuminated objects in turbulence
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The effect of correlation of opposing waves (one of them is incident on the viewed object and the other is reflected from it) on short-exposure imaging in turbulence is investigated theoretically. The case of strong optical turbulence is considered. As a result it is shown that the spatial spectrum of the mean of intensity in the image of coherently illuminated in a turbulent atmosphere object is presented in a form of two terms. The first term describes the short-exposure image of an incoherently illuminated object, and the other owes its origin to correlation of the opposing waves. This term contains the spectral components of the high- frequency part of spatial spectrum of the object, filtered by inhomogeneous medium in the absence of counter wave correlation. Both incoherent term of the spatial spectrum of short- exposure image and coherent one cover the more high-frequency range than in the case of long-exposure image. The behavior of quality of short-exposure coherent images as compared to long-exposure ones is estimated.
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Viktor A. Banakh and Chen Ben-Nam "Short-exposure imaging of coherently illuminated objects in turbulence", Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995);

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