Directing the shape of optical fractality in the Talbot band

Directing the shape of optical fractality in the talbot band In this study, using the method of changing the sensitivity of different optical paths in the range of the Fourier spectral interferometer that leads to the production of Talbot bands, and also using a near- field interferometer, behind a periodic scattering grid under parallel light patterns appear that are called Talbot carpets or quantum carpets. The present study also shows that for a specific propagation distance, at a certain radial distance, the shadow pattern changes to the near field and at another distance from the specific radius, the diffraction pattern changes from a near- field to a far-field. The results were first obtained by simulation and then confirmed by experiments.