Making holograms interactive

Acoustic holograms have developed over the last 10 years as powerful tools for ultrasonic wavefront and field shaping. They can provide high-resolution control over wavefronts, allowing them to form much more spatially complex wavefronts than existing array transducers, and with significantly simpler hardware. However, unlike ultrasonic arrays, acoustic holograms are static: the fields they produce cannot be readily changed or adapted in real-time. To address this limitation, our group has developed different approaches to realize dynamic and interactive holograms over the past several years. In this talk, I will describe these recent efforts and highlight some of our latest work in this area, including the combination of holograms and transducer arrays, the integration of machine learning techniques in the hologram design process, and the development of remotely addressable electrical circuits for the dynamic updating of high-density ultrasonic arrays. Our work demonstrates different approaches that can be taken to expand the versatility of holograms. This talk highlights the opportunities for interactive holograms and the advantages of certain methods.