A problem of Airy pulse transformation by a plane-parallel layer is considered. A problem formulation is equivalent to a case of permittivity sharp change in a dielectric
layer at zero moment of time. It allows to use the resolvent method for solution of the Volterra integral equation describing this phenomenon. It is shown a virtual structure of a pulse field inside the layer. Influence of a number of pulse re-reflections from the layer boundaries on a form of a primary pulse is analyzed.