Method and Device for the Analysis of Movement in a Scattering Medium
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Abstract
Method and device for detecting and analyzing movement in a scattering medium, by: projecting a coherent light towards the scattering medium; performing a spatial and temporal sampling of the electromagnetic field of scattered light, in order to obtain a plurality of images of the electromagnetic field; and analyzing the speckle grains resulting from the images obtained from the spatial and temporal sampling of the electromagnetic field of the scattered light, in order to detect and analyze a movement in the scattering medium, the speckle grain analysis step including a step of analyzing the inter-image distance.
16 Citations
40 Claims
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1-20. -20. (canceled)
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21. Method of detecting and analyzing movement in a scattering medium, said method comprising:
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projecting a coherent light towards said scattering medium; performing a spatial and temporal sampling of the electromagnetic field of the light scattered by said scattering medium, in order to obtain a plurality of images of said electromagnetic field; and analyzing the speckle grains resulting from said images obtained from said spatial and temporal sampling of the electromagnetic field of the scattered light, in order to detect and analyse a movement in said scattering medium, wherein the speckle grain analysis step comprises a step consisting in analyzing the inter-image distance. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. Device for detecting and analyzing movement in a scattering medium, which comprises:
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means (1) for projecting a coherent light towards said scattering medium (5), matrix sensor means (2) which can be used to perform a spatial and temporal sampling of the electromagnetic field of the light (6) scattered by said scattering medium, in order to obtain a plurality of images of said electromagnetic field, - means (3) for observing said images of the electromagnetic field of the scattered light; means (4) for analyzing the speckle grains resulting from said images; and means for analyzing the inter-image distance. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification