Non-invasive imaging through scattering medium beyond the memory effect via polarization-modulation

Abstract

The phenomenon of light scattering has brought challenges to many fields. In recent years, a novel method based on speckle-correlation has been proposed to look through scattering medium. However, the field of view (FOV) of this method is limited by the angular range of the optical memory effect (OME). In this paper, a polarization modulation-based method is proposed to look through the scattering medium beyond the OME range. This method can achieve single-shot non-invasive looking through multilayer scattering medium by using a polarization camera. Targets beyond the 4 times OME range is recovered by a single shot and a larger one also can be restored by moving the camera to collect the light signal. Unlike other methods that aim at imaging beyond OME, this method can reconstruct targets without reference points. The proposed method has no restriction on the target distribution, and both a single target or two separate targets can be recovered. The effectiveness of the method is verified through experiments.