On the Achievable Resolution in Inverse Source beyond the Fresnel Approximation: Numerical Results

In this paper, the classical question of estimating the achievable resolution in terms of the configuration parameters in inverse source problems is addressed. In particular, the study is developed for a two-dimensional scalar geometry where a strip source is to be reconstructed from its radiated field observed over a bounded rectilinear domain. In particular, the source domain is considered orthogonal and parallel to source so to separately focus on depth and transverse resolution. The derived resolution formulas clearly point out the role of geometrical parameters and coincide with the ones pertaining to the Fresnel zone when the geometry verifies the Fresnel approximation.