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In this thesis, the penetrative imaging of 2D objects
embedded in layeredmedia under multifrequency plane waves
illumination is being investigated. Weknow that the Green's
function of a line source embedded in layered media can
beformulated by using plane wave expansion. Here, the
multifrequency plane wave backward propagation is being proposed
based on the Green's function mensioned above. The FFT is
applied on computation process of the Fourier transform,futher,
it's employed in the computation of Green's function,
penetrating fieldand image reconstruction. Besides, the
performance of the penetrative imageunder the interference of
uniform distributed random noise and multiple reflected field is
also discussed. An experimental measurement is implemented
accordingly. Finally, further developments for practical
applications in nondestructive detection are forseen by the
experimental results together with their simulations.
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