METHOD OF INVESTIGATING DYNAMICAL PROCESSES IN TRANSPARENT MULTI-PHASE POROUS AND GRAIN MATERIALS Russian patent published in 2006 - IPC G01N21/41 

FIELD: analyzing or investigating materials.

SUBSTANCE: method comprises determining mass of material, mass and volume of immersion liquid, mass and volume of material filled with the immersion liquid, internal structure of material, and distribution of the refraction index. The molecular refraction of material and immersion liquid are calculated form the data on the mass, volume, and refraction index. The inert transparent particles with known density and refraction index are added to the immersion liquid. The sizes of the particles are smaller than the characteristic sizes of the internal structure of the material. The material of transparent particles is made of glass.

EFFECT: enhanced information content.

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