Joint-Statistics between Reflected and Transmitted Speckle Patterns: From Mesoscopic Correlations to Information Theory
June 12th, 2018 NIKOS FAYARD ESPCI Paris

Clouds, milk, paper or biological tissues are called scattering media for light. Indeed when a plane wave encounters one of these media, the light is scattered and loses its preferential direction. Consequently, imaging through a complex medium is more difficult than in a homogeneous one.

Wavefront shaping methods allows one to image through such a medium using a CCD camera that measures the transmitted light. Nonetheless, in practical cases the transmitted side of the sample is out of reach of the operator.

In this work we interest ourselves to the link that exists between the reflected light and the transmitted light for thick scattering media. From a statistical point of view, this link is equivalent to the statistical dependency between the reflected light and the transmitted light. We show that the statistical dependency persists even for very thick media allowing us to propose new imaging modalities based on it. This statistical dependency between the reflected and the transmitted light is a very rich function of the parameters of the system, and allows us to control the transmitted light using reflected informations only.

Seminar, June 12, 2018, 12:00. ICFO’s Seminar Room

Hosted by Prof. Darrick Chang