Phase Retrieval Approach for Transmission Matrix Identification in Polytetrafluoroethylene (PTFE)
Year: 2025
Type: article
Abstract: We present a phase retrieval approach for identifying the transmission matrix (TM) of highly scattering media, specifically PTFE. Utilising structured illumination via a Digital Micromirror Device (DMD) and Wirtinger Flow optimization, our method reconstructs complex TM elements from intensity-only measurements without the need for reference beams. This enables robust, real-time wavefront shaping applicable to biomedical imaging. Experimental results demonstrate high fidelity in TM recovery and spatial focusing efficiency, validating the feasibility of this approach in practical scenarios. A comparative evaluation of two measurement strategies –random phase masks versus one-to-one actuator mapping – is presented, demonstrating the practical implications of each method.
Authors: A. Santosa, S. Fomins, V. Karitāns
Institutions: Institute of Solid State Physics, UL, University of Latvia
Language: English
Subfield: Acoustics and Ultrasonics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4414901492