A series of experiments on passing Bessel beams in scattering media has been conducted confirming the effect of reconstruction of a Bessel beam after shading by single obstacles. Thus, the detailed theoretical and experimental investigations have confirmed that the self-reconstruction of the structure is the basic property of the Bessel beams. This property constitute a physical basis of the concrete developments of various optical probes for the nondestructive testing and studying various scattering media. Bessel beam based laser probes are perspective in optical tomography, confocal microscopy, multi-photon fluorescence microscopy, imaging through scattering media et all.

As an obstacle, various materials have been used, for example, metal balls, drops of a paint, etc. The experimental results have shown the presence of reconstruction in a good agreement with our theoretical calculations. The second kind of experiments included the investigation of the passage of a Bessel beam through multilayered obstacles. The main result here consists in that the effect of the repeated reconstruction of the structure takes place. For manifestation of this effect it is necessary for the distances between obstacles to exceed the characteristic length of reconstruction. The third kind of experiments concerned the investigation of propagation of Bessel beam in the bulk of scattering media. Various kinds of such media (suspension of latex micro-spheres of the standard diameter, a water solution of milk, a smoke, etc.) were used. It is revealed that Bessel beams can exhibit the reconstruction of the structure, while the collimated Gaussian beams are rather highly distorted. It is also shown that the reconstruction of the structure is improved when increasing the cone angle, which is explained by the reduction of the characteristic length of restoration.

Vortices in Bessel beams