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Variable coherence tomography.

Erwan Baleine1, Aristide Dogariu

  • 1School of Optics, University of Central Florida, Orlando, Florida 32816-2700, USA.

Optics Letters
|June 24, 2004
PubMed
Summary
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Adjusting spatial coherence controls coherence volumes. This study presents a scattering method to determine medium spatial correlation using intensity measurements in one direction.

Area of Science:

  • Optics and Photonics
  • Wave Phenomena
  • Coherence Theory

Background:

  • Spatial coherence is a fundamental property of light.
  • Controlling spatial coherence influences wave propagation and interference.
  • Scattering experiments probe the structure of materials.

Purpose of the Study:

  • To propose a method for determining the degree of spatial correlation in quasi-homogeneous media.
  • To utilize a quasi-monochromatic beam with adjustable spatial coherence for scattering experiments.

Main Methods:

  • Adjusting the spatial coherence of a quasi-monochromatic beam to control the distance between coherence volumes.
  • Performing a scattering experiment using the modified beam.
  • Recording scattered intensity in a single direction.

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Main Results:

  • Demonstration of controlling coherence volume separation through beam spatial coherence adjustment.
  • Development of a method to deduce spatial correlation from single-direction scattered intensity.

Conclusions:

  • The proposed method offers a simplified approach to characterizing medium spatial correlation.
  • Adjustable spatial coherence beams are valuable tools in scattering diagnostics.