A new algorithm for large surfaces profiling by fringe projection

A method for profiling surface objects based on the fringe projection method and a phase shifting algorithm is described. The application of this method to large surfaces is problematic since the calibration step requires the use of a reference plane as large as the object. A new algorithm based on...

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Bibliographic Details
Published in:Sensors and Actuators A: Physical 2004-09, Vol.115 (2), p.178-184
Main Authors: Pavageau, S., Dallier, R., Servagent, N., Bosch, T.
Format: Article
Language:English
Subjects:
Fringe projection
Instrumentation and Detectors
Object reconstruction
Phase shifting
Physics
Profilometry
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Description
Summary:A method for profiling surface objects based on the fringe projection method and a phase shifting algorithm is described. The application of this method to large surfaces is problematic since the calibration step requires the use of a reference plane as large as the object. A new algorithm based on least-squares method has also been developed to bypass this calibration step, and so the use of a reference plane. First experimental results on a carbon panel and on a parabolic aerial are presented to show the validity of the proposed algorithm. Accuracy of 1 mm has been obtained for an object of 1 m and 20 cm long, while sensitivity has been proved to be of the order of 100 μm.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2003.12.030