In Talbot effect, the change of the refractive index along the direction perpendicular to grating lines causes the change of fringes. In the other hand, the intensity of fringes is relative to the principal refractive index and its direction of birefringent object. This paper analyzes the two kinds of Talbot effect mentioned above. The result obtained is suitable for image processing.
"Talbot Carrier Image Processing Of Birefringence Effect", Proc. SPIE 0955, Industrial Laser Interferometry II, (14 December 1988); doi: 10.1117/12.947669; https://doi.org/10.1117/12.947669