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Structural length-scale sensitivities of reflectance measurements in continuous random media under the Born approximation

2012; Optica Publishing Group; Volume: 37; Issue: 24 Linguagem: Inglês

10.1364/ol.37.005220

1539-4794

Andrew J. Radosevich, Ji Yi, Jeremy D. Rogers, Vadim Backman,

Optical Imaging and Spectroscopy Techniques

Which range of structures contributes to light scattering in a continuous random media, such as biological tissue? In this Letter, we present a model to study the structural length-scale sensitivity of scattering in continuous random media under the Born approximation. The scattering coefficient μs, backscattering coefficient μb, anisotropy factor g, and reduced scattering coefficient μs* as well as the shape of the spatial reflectance profile are calculated under this model. For media with a biologically relevant Henyey-Greenstein phase function with g∼0.93 at wavelength λ=633 nm, we report that μs* is sensitive to structural length-scales from 46.9 nm to 2.07 μm (i.e., λ/13 to 3λ), μb is sensitive from 26.7 to 320 nm (i.e., λ/24 to λ/2), and the spatial reflectance profile is sensitive from 30.8 nm to 2.71 μm (i.e., λ/21 to 4λ).