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DOE OSTI · 22036566

Three-dimensional profiling with binary fringes using phase-shifting interferometry algorithms

Ayubi, Gaston A·Di Martino, J Matias·Alonso, Julia R·Fernandez, Ariel·Perciante, Cesar D·Ferrari, Jose A
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Abstract

Three-dimensional shape measurements by sinusoidal fringe projection using phase-shifting interferometry algorithms are distorted by the nonlinear response in intensity of commercial video projectors and digital cameras. To solve the problem, we present a method that consists in projecting and acquiring a temporal sequence of strictly binary patterns, whose (adequately weighted) average leads to a sinusoidal fringe pattern with the required number of bits. Since binary patterns consist of ''ones'' and ''zeros'' - and no half-tones are involved - the nonlinear response of the projector and the camera will not play a role, and a nearly unit contrast gray-level sinusoidal fringe pattern is obtained. Validation experiments are presented.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSALGORITHMSINTERFEROMETRYNONLINEAR PROBLEMSPHASE SHIFTTHREE-DIMENSIONAL CALCULATIONS

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Ayubi, Gaston A, Di Martino, J Matias, Alonso, Julia R, Fernandez, Ariel, Perciante, Cesar D, Ferrari, Jose A. 2011-01-10. Three-dimensional profiling with binary fringes using phase-shifting interferometry algorithms. https://doi.org/10.1364/ao.50.000147

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