A system for illuminating an object with a wave, comprising: - a lens for converging a far field wave to a desired 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 said signals t j (t) of index-number j to the transducers so that the transducers emit said far field wave corresponding to the signals and so that the lens produces said 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 a minimum and a maximum wavelength 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. - a lens for converging a far field wave to a desired 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 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 said signals t j (t) of index-number j to the transducers so that the transducers emit said far field wave corresponding to the signals and so that the lens produces said 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, - the resonance wavelength λ R is comprised between a minimum and a maximum wavelength 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.