Abstract
In this paper we present an optical technique based on theshadow moiré method which allows the measurement anddigitization of three-dimensional surfaces. The technique wastested through experimental work and the results were compared withthose obtained by a coordinate measuring machine. Moving from theconventional shadow moiré method, new features were implementedenabling us to overcome the main shortcomings of the conventionalmoiré method. These include the need to assign the fringe order,the incapability of discerning concavity or convexity, the poorresolution and the complexity in the signal processing. All theseproblems have been solved by adding an element to generate a carrierfringe pattern to the equipment of the conventional shadow moirétechnique and processing the obtained signal using the Fouriertransform method. The proposed technique was applied to obtainexternal surfaces of sheet metal stamped parts. The experimentalresults show the effectiveness of this technique.
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