A reconfigurable, broadband light-field mapper for illusionary effects

The manipulation of light field is pivotal for advancing optical technologies. Here, we present a reconfigurable optical system based on lens-fiber networks that function as a light-field mapper, capable of generating macroscopic optical illusions. This system employs a lens array to decompose the incident light field, which is then transmitted via a fiber network and reconstructed by a second lens array. This process establishes a reconfigurable mapping between input and output light fields. Through proof-of-principle experiments, we demonstrate “free-space” illusion devices, where light rays traverse the mapper—including embedded opaque objects—in straight lines, effectively mimicking propagation through free space. Our work introduces a flexible platform for light-field manipulation with potential applications in virtual reality, optical computing, and secure communication.