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In this paper, we describe the optical grid deflection method used toreconstruct the 3D profile of liquid films deposited by a receding liquidmeniscus. This technique uses the refractive properties of the film surface andis suitable for liquid thickness from several microns to millimeter. Thismethod works well for strong interface slopes and changing in time film shape;it applies when the substrate and fluid media are transparent. The refractionis assumed to be locally unidirectional. The method is particularly appropriateto follow the evolution of parameters such as dynamic contact angle, tripleliquid-gas-solid contact line velocity or dewetting ridge thickness.

3D reconstruction of dynamic liquid film shape by optical grid deflection method