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Method and apparatus for remote sensing of objects utilizing radiation speckle

  • US 8,265,375 B2
  • Filed: 06/16/2007
  • Issued: 09/11/2012
  • Est. Priority Date: 06/16/2006
  • Status: Active Grant
First Claim
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1. An imaging apparatus, said imaging apparatus comprising:

  • at least one source of coherent radiation outputting a plurality of wavelengths illuminating an object creating a plurality of speckle patterns each corresponding to the plurality of wavelengths;

    at least one sensor at a location relative to said object to determine a speckle pattern intensity for each of the plurality of wavelengths;

    a processor receiving information from at least one sensor, said processor having means for constructing at least one autocorrelation of said object from said intensities of said speckle pattern;

    a first portion of said coherent radiation passing through a curved surface;

    a second portion of said coherent radiation being reflected by said curved surface creating a reference point;

    said reference point is a virtual spot of focused coherent radiation producing a copy in said autocorrelation;

    said virtual spot of focused coherent radiation is located behind the curved surface; and

    said processor further comprising means for executing a regional image selection technique to construct a representation of said object utilizing said reference point and said autocorrelation.

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