Imaging obscured subsurface inhomogeneity using laser speckle.

  title={Imaging obscured subsurface inhomogeneity using laser speckle.},
  author={Ralph E Nothdurft and Gang Yao},
  journal={Optics express},
  volume={13 25},
We have developed a laser speckle imaging method to reveal obscured subsurface inhomogeneities that cannot be seen under incoherent illumination. Speckle images of a scattering object were generated under coherent illumination using a laser. A sequence of speckle images was acquired with fixed exposure time and acquisition interval. The temporal statistics of each pixel in the image sequence was calculated and formed a new image. We demonstrate that such temporal speckle contrast images can… CONTINUE READING

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