Ultrasonic focusing through inhomogeneous media by application of the inverse scattering problem
نویسندگان
چکیده
منابع مشابه
Focusing through dynamic scattering media.
We demonstrate steady-state focusing of coherent light through dynamic scattering media. The phase of an incident beam is controlled both spatially and temporally using a reflective, 1020-segment MEMS spatial light modulator, using a coordinate descent optimization technique. We achieve focal intensity enhancement of between 5 and 400 for dynamic media with speckle decorrelation time constants ...
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Focusing light through scattering media has broad applications in optical imaging, manipulation and therapy. The contrast of the focus can be quantified by peak-to-background intensity ratio (PBR). Here, we theoretically and numerically show that by using a transmission matrix inversion method to achieve focusing, within a limited field of view and under a low noise condition in transmission ma...
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SCATTERING MEDIA by XIAOLONG ZHANG (Under the Direction of Peter Kner) ABSTRACT Random light scattering in inhomogeneous media causes strong wavefront aberrations and makes it impossible to focus light. Many wavefront correction techniques have been recently demonstrated to control light propagation in these media. Phase modulation with a spatial light modulator (SLM) and digital light modulato...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1998
ISSN: 0001-4966
DOI: 10.1121/1.423291