Iteration of optical time reversal by ultrasonic encoding in biological tissue
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United States of America Patent
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May 10, 2016
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Jan 9, 2014
app pub date -
Sep 13, 2013
filing date -
Jan 25, 2010
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Abstract
Iterating an optical phase conjugation of ultrasonically-modulated diffuse light emitted by a scattering medium includes illuminating the scattering medium with a light beam from a coherent light source, modulating the diffuse light transmitted through the scattering medium with an ultrasonic wave focused on a region of interest within the scattering medium, fixing a hologram, retro-reflectively illuminating the scattering medium using a phase-conjugated copy of the diffuse light that was ultrasonically modulated, moving the ultrasonic focus, and iterating until light is focused on the final target.
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