Ray integrals of integrated photoelasticity at weak optical anisotropy

Abstract

As initial data, optical polarization tomography of tensor and vector fields uses ray integrals the values of which are determined from polarization measurements. Most algorithms of integrated photoelasticity are based on the linear approximation of the solution of the birefringence equations. In this work, the approximation of smooth rotation of quasi-principal axes of the polarization tensor is proposed for use in approximating values of ray integrals.