Patent ID: 9581429
Date: 2017-02-28
CPC Classifications: G01B,G01N,G03H

Claim:
1. A method for reconstructing optical properties of at least one diffracting object immersed in a liquid medium using a reconstruction system that comprises a spatially coherent light source and a matrix photodetector, wherein the liquid medium is delimited by a transparent surface and the at least one diffracting object is in contact with the transparent surface, and wherein the liquid medium and the matrix photodetector are separated by a distance along a vertical direction, the method comprising: illuminating the liquid medium with the spatially coherent light source; measuring, with the matrix photodetector, an intensity of at least one diffraction pattern transmitted by the illuminated medium along a vertical direction, wherein each diffraction pattern corresponds to waves diffracted by the at least one diffracting object upon illumination of the medium; and reconstructing the optical properties of the at least one diffracting object at a reconstruction height according to a reconstruction algorithm from the measured intensity of the at least one diffraction pattern, wherein the reconstruction height is a parameter of the reconstruction algorithm that is distinct from the distance between the liquid medium and the matrix photodetector alonq the vertical direction, and wherein the reconstruction height has a value selected to be less than the distance between the liquid medium and the matrix photodetector along the vertical direction.