Abstract
The system proposed uses triangulation for 3D reconstruction of object surfaces. The system does not need preliminary calibration of reference fringes since it records simultaneously, on a single image, both reference and object deformed fringes. Reference lines are obtained by a linear interpolation between two reference points observed above and below the object. To produce an illumination with large depth of focus, we propose the use of Fresnel diffraction from an edge. The line separating dark and bright areas of the fringe pattern is used for light sectioning of the object, and the height profile is obtained through triangulation. Experimental 3D measurements are shown for various objects having large depth variations and are obtained with a height resolution of 1 mm at a distance of 500 mm, within a field of view of 25 degree(s).© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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