Poincare sphere noise filtering for singularities in dynamic speckle activity: Application to paint drying time measurement

Dynamic laser speckle study on the effect of TiO2 and SiO2 nanoparticles in coatings

“…The utilization of compensatory logic operators in analyzing dynamic speckle image sequences in the study of water-based paint drying led to enhanced refinement of activity stages at various drying times [15]. A filter using the Poincare sphere is employed in the paint drying process to remove unstable vortices, as indicated by the optical vortex density within the pseudo-phase of temporal history of the speckle pattern (THSP) [16]. Experiments conducted with paints have suggested that the dynamic light scattering (DLS) phenomenon generated by infra red (IR) lasers may be less responsive to certain biological pigments, potentially making it challenging to directly assess their effects [17].…”