Apparatus and method for spatial light modulation

Wenfeng Xia (Inventor), Tianrui Zhao (Inventor), Tom Vercauteren (Inventor), Sebastien Ourselin (Inventor)

Research output: Patent

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A computer-implemented method of transmitting through a disordered medium from a transmitter to a receiver an image represented as input coherent electromagnetic radiation, the disordered medium having a transmission matrix comprising a plurality of complex-valued transmission constants that relate said input coherent electromagnetic radiation to output electromagnetic radiation at said receiver, which method comprises the steps of:
performing a characterising process on said disordered medium to determine said transmission matrix;
using said transmitter to transmit said image through said disordered medium;
performing a reconstruction process using said transmission matrix to generate a reconstructed image from the output electromagnetic radiation at said receiver;
wherein in said characterisation process the step of determining said transmission matrix comprises:
determining said complex-valued transmission constants as real-valued transmission constants by using an approximately linear relationship between said input electromagnetic radiation and said output electromagnetic radiation; and
using said real-valued transmission constants to generate and store a version of the transmission matrix;
and said reconstruction process comprises the steps of:
generating an output signal comprising intensity or amplitude values of said output electromagnetic radiation;
generating said reconstructed image by combining said output signal and said version of the transmission matrix in a way that effects a matrix multiplication of an inverse of said transmission matrix and said output signal; and
outputting said reconstructed image from said receiver.
Original languageEnglish
Priority date17/01/2020
Filing date15/01/2021
Publication statusPublished - 27 Jul 2023

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