The State of Israel, Atomic Energy Commission, Soreq Nuclear Research

Ariel Corporation

Ariel—the University Company for Research and Development, Ltd.

Shmuel Sternklar

Er'el Granot

Yosef Ben-Aderet

Er′el Granot

Disclosed is a method for determining an phase spectrum &#x3b8;(&#x3c9;) of the complex spectral transfer function H(&#x3c9;) of a medium. In some embodiments, the method is applied for detecting or imaging an object screened by scattering medium or for determining a refractive index spectrum of a material.

Methods and devices for analyzing material properties and detecting objects in scattering media

Method and system for determining the optical temporal response of a medium () to a short optical pulse excitation, by sending light () that comprises spectral frequencies which make up the Fourier Transform of the short pulse to be emulated through the medium. The relative amplitude and phase change () of each of the spectral components light () exiting the medium is determined with respect to that of the illuminating light source and the spectral response of the medium is obtained from the relative amplitude and phase change. An inverse Fourier Transform is then computationally performed on the spectral response to obtain the temporal response of the medium to the emulated short pulse.

Method and apparatus for imaging through scattering or obstructing media

A method of deflecting and steering laser beams of the kind that comprises generating two converging pumping beams defining between them a convergence angle .psi.. The two converging pumping beams are targeted on a predetermined intersection region of a third-order, non-linear polarization medium so as to intersect therein whereby each of said pumping beams is split in the said intersection region to form a plurality of scattered portions each of which interferes with the pumping beam from which it was formed to generate a light interference pattern, the light interference patterns thus generated from the two pumping beams causing self-generation of a common grating such that there emerge from said polarization medium two output beams each forming with a neighboring pumping beam a steering angle .THETA. which is controllable by variation of the magnitude of the wavenumber of at least one of the two pumping beams so as to form a wavenumber difference dk between the two pumping beams. In accordance with the invention wavenumber difference is obtained by the controlled variation of either or both of a refractive index n' and absorption index n' associated with at least one of the pumping beams.

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Rehovot, Israel

Shmuel Sternklar