Fluctuation imaging

David A. Boas; L. E. Campbell; Arjun G. Yodh

doi:10.1117/12.209970

30 May 1995 Fluctuation imaging

David A. Boas, L. E. Campbell, Arjun G. Yodh

Proceedings Volume 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation; (1995) https://doi.org/10.1117/12.209970
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

The temporal behavior of light diffusing through dense random media has been shown to provide information on the time-dependent density fluctuations within the media. For homogeneous fluctuating media, such as dense colloids, the magnitude of these fluctuations is obtained from the temporal intensity autocorrelation of an emerging speckle. In this contribution, we present experimental measurements of heterogeneous fluctuating media, i.e. turbid random media with spatially heterogeneous static and dynamic components, and we demonstrate that low resolution images of such media may be derived from position-dependent temporal autocorrelation measurements. Our analysis is based on a diffusion approximation for the correlation transport equation. The method should enable experimentors to distinguish different dynamical regions within turbid media.

Citation Download Citation

David A. Boas, L. E. Campbell, and Arjun G. Yodh "Fluctuation imaging", Proc. SPIE 2389, Optical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation, (30 May 1995); https://doi.org/10.1117/12.209970

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KEYWORDS

Diffusion

Optical spheres

Spherical lenses

Scattering

Light scattering

Particles

Absorption

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