Multi-object coaxial imaging with an Airy beam array

Multi-object imaging can obtain more comprehensive information to analyze the surrounding environment better and is widely used in many fields. While most multi-object imaging methods require objects not to be coaxial, which must ensure that each object is within the line-of-sight (LOS) of beam progression. In this paper, we present an approach for imaging multiple coaxial objects utilizing an Airy beam array, which can see hidden objects and is conducive to expanding the range of information perception. The feasibility of our scheme is verified through numerical simulations and experiments, and the imaging capability influenced by the axial distance and size of objects is studied. In addition, the minimum imaging distance of the imaging system is also derived. The results will open new ideas for non-line-of-sight (NLOS) imaging and may find applications in queue target imaging.