1. A system for illuminating an object with a wave, comprising: a lens for converging a far field wave to a near field wave, said lens comprising a medium and a plurality of resonator elements incorporated inside said medium, each resonator element being spaced from an other resonator element inside the medium of a distance lower than a first distance d 1 , and having: a width w R in a direction to a neighbour resonator element lower than said first distance d 1 , a length l R in an other direction, and a resonance frequency f R corresponding to a resonance wavelength λ R , a plurality of transducers remote from said lens, said plurality of transducers having a transducer wavelength bandwidth Δλ T and being adapted to emit the far field wave towards the lens based on signals t j (t) of index-number j, and a control unit connected to said transducers, said control unit providing signals t j (t) of index-number j to the transducers so that the transducers emit a far field wave corresponding to the signals and so that the lens produces a desired near field wave, said desired near field wave being focused on at least a plurality of points P i of index-number i belonging to an object so as to illuminate said object with said desired near field wave, wherein: the resonance wavelength λ R is comprised between λ min and λ max inside the transducer wavelength bandwidth Δλ T so that the near field wave spreads into a desired wavelength bandwidth Δλ D between λ min and λ max , the first distance d 1 is lower than λ max /5 so that said resonator elements are coupled to each other, and the system further comprises positioning means adapted for positioning at least one point P i of the object at a distance of at least one resonator element lower than a second distance d 2 , said second distance d 2 being lower than λ max /5.