Three-dimensional bio-imaging of objects behind scattering medium

In this short paper we briefly summarize the conference presentation that contained introducing several novel schemes allowing 3D-position tunable focusing through and behind scattering medium. By scanning the object (that is positioned behind the scattering medium) with the position tunable focus one can perform its 3D imaging. In the proposed schemes both the illumination module and the detection module are on the same side of the inspected object. In addition to that, the imaging process is a real time fast converging operation. The physics behind the new concepts involves either the assumption that the imaging lens can produce several images with several focusing lengths or that the illuminating wavefront travels forward and backwards through the same scattering medium, or simply apply super resolving either wavelength or time multiplexing concepts. The presented techniques allow reference-free, non-invasive imaging through scattering medium and since our illumination system and the detection system are on the same side of the object, it does not require direct access behind the medium nor use feedback from there. Thus, the presented concepts might be providing high added value utility for biological and medical non-invasive imaging based diagnostic tools.