Using inverse fringe projection to speed up the detection of local and global geometry defects on free-form surfaces

Andreas Pösch; Taras Vynnyk; Eduard Reithmeier

doi:10.1117/12.928700

15 October 2012 Using inverse fringe projection to speed up the detection of local and global geometry defects on free-form surfaces

Andreas Pösch, Taras Vynnyk, Eduard Reithmeier

Author Affiliations +

Proceedings Volume 8500, Image Reconstruction from Incomplete Data VII; 85000B (2012) https://doi.org/10.1117/12.928700
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Inverse fringe projection can be seen as an improvement to the classical fringe projection method to significantly speed up the measurement of geometry defects of optical cooperative workpieces requiring no hardware changes to the classical setup. The CAD model of an ideal specimen is used in a virtual fringe projection system to generate a single sophisticated inverse fringe projection pattern which is, then, projected onto the surface of the real workpiece. Subsequently, 3D-geometry defects can be extracted directly and very quickly from a single image captured by the real camera using elaborate 2D-algorithms. This allows for verification of allowed geometry tolerances with a significantly reduced latency time.

Citation Download Citation

Andreas Pösch, Taras Vynnyk, and Eduard Reithmeier "Using inverse fringe projection to speed up the detection of local and global geometry defects on free-form surfaces", Proc. SPIE 8500, Image Reconstruction from Incomplete Data VII, 85000B (15 October 2012); https://doi.org/10.1117/12.928700

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