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360-degrees digitalization of three-dimensional (3D) solids using a projectedlight-strip is a well established technique. These profilometers project alight-strip over the solid under analysis while the solid is rotated a fullrevolution. Then a computer program typically extracts the centroid of thislight-strip, and by triangulation one obtains the shape of the solid. Hereinstead of using intensity-based strip centroid estimation, we propose to useFourier phase-demodulation. This 360-degrees profilometer first constructs acarrier-frequency fringe-pattern by closely adding individual light-stripimages. Secondly this high-density fringe-pattern is phase-demodulated usingthe standard Fourier technique.

Fourier phase-demodulation applied to strip-light 360-degrees profilometry of 3D solids; theoretical principles