Estimation of light penetration depth in turbid media using laser speckles.
We present novel experimental method for estimation of the light penetration depth (LPD) in turbid media based on the analysis of the speckle pattern structure. Under the certain illumination conditions this structure is strongly dependent on the penetration depth. Presented theoretical model based on the Bragg diffraction from the thick holograms allows LPD estimation if only one parameter of the material, namely refractive index, of the material is known. Feasibility of the method was checked experimentally. Experimental results obtained for variety of the materials are in good agreement with the theoretical assumptions. It was shown that qualitative LPD comparison does not require knowledge of the material properties.
Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, FIN-70211 Kuopio, Finland. igor.sidorov@uef.fi
Igor S
IS
Sidorov
Serguei V
SV
Miridonov
Ervin
E
Nippolainen
Alexei A
AA
Kamshilin
D045424:Complex Mixtures / Q000737:chemistry*; D003198:Computer Simulation; D007834:Lasers; D008027:Light; D008956:Models, Chemical; D009391:Nephelometry and Turbidimetry / Q000379:methods*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
D045424:Complex Mixtures