Abstract
This talk will review the decomposition of the time reversal operator (D.O.R.T.) method. This new approach to active detection and focusing of acoustic waves using arrays of transmitters and receivers allows selecting and focusing on scatterers through complex media. The method was derived from the theoretical analysis of iterative time reversal mirrors. It consists essentially in the construction of the invariants of the time reversal process. The diagonalization of the time reversal operator provides both a measure of the strength of a scatterer and the phase law that can be applied to the array to focus selectively on a scatterer. After explaining the principle of the D.O.R.T. method several experimental results will be shown.
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