Single-Shot Non-Invasive Imaging Through Dynamic Scattering Media Beyond the Memory Effect via Virtual Reference-Based Correlation Holography

Abstract

Non-invasive wide-field imaging through dynamic random media is a sought-after goal with important applications ranging from medical diagnosis to remote sensing. However, some existing methods, such as speckle correlation-based techniques, are limited in field of view due to the memory effect; while some other methods, such as wavefront shaping and transmission matrix techniques, face considerable challenges when applied in dynamic scenarios because of the complexity involved in modulation and measurement. These limitations significantly impede the effectiveness and applicability of these approaches. Here, the concept of virtual reference light (VRL), which allows for the reconstruction of the original object with just a single-shot detection of the speckle is proposed. Experimental results demonstrate that the imaging field achieves a 3.8-fold memory effect range. In the experimental setup, the light source and detector are positioned on one side of the random medium, while the sample is placed on the opposite side, enabling non-invasive detection. Imaging results with both static and dynamic scattering media are presented to verify the feasibility of the proposed method, offering an effective solution for real-time target imaging and detection.