Controlling optical properties of biological tissues: II. Coherent optical methods for studying the tissue structure |
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Authors: | D. A. Zimnyakov I. L. Maksimova V. V. Tuchin |
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Affiliation: | (1) Saratov State University, Saratov, 410026, Russia |
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Abstract: | Correlation and polarization properties of dynamic speckle fields formed upon scanning in vitro human sclera samples subjected to immersion agents with a focused laser beam were studied. The immersion agent diffusion into the tissue reduces the relative refractive index of structure-forming elements (collagen fibrils) with respect to the base sclera substance and thus stimulates the passage from multiple to single scattering of a probing beam. Experimental data are presented on the evolution of the autocorrelation function of intensity fluctuations and the intensity ratio between polarized and depolarized components of laser radiation passed through a sclera layer due to artificial clarification of the tissue samples analyzed. Possible applications of the developed method to the tissue structure diagnostics are discussed. |
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