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Holographic tomography in three-dimensional photoelasticity within the Born approximation

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Abstract

In this paper, a holographic tomography method for the reconstruction of the applied stress field in a three-dimensional (3-D) photoelastic object is presented based on the weak scattering approximation. The optical inhomogeneity and anisotropy in the object are caused by the applied stress field through the photoelastic effect. The method uses angular-diversity illumination with monochromatic plane waves and planar recording screens. Polarizations of wave fields are considered and used together with the equilibrium equations for uncoupling the components of the dyadic scattering function. In this method, the low-pass version of the 3-D stress dyadic field in a model is reconstructed in a nondestructive manner.

© 1992 Optical Society of America

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