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Proceedings Paper

Uniaxial 3D shape measurement with projector defocusing
Author(s): Ying Xu; Laura Ekstrand; Song Zhang
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Paper Abstract

Our recent study showed that the phase error caused by improperly defocused binary structured patterns has a unique relationship with the depth z. Based on this finding, the depth information can be extracted without the need of triangulation. Because the measurement can be performed from the same viewing angle, this uniaxial measurement technique can overcome some limitations of a triangulation-based technique, such as measuring a deep hole. This paper will present the principle of the proposed technique and show some simulation and preliminary experimental results to verify its viability.

Paper Details

Date Published: 14 September 2011
PDF: 8 pages
Proc. SPIE 8133, Dimensional Optical Metrology and Inspection for Practical Applications, 81330M (14 September 2011); doi: 10.1117/12.892362
Show Author Affiliations
Ying Xu, Iowa State Univ. (United States)
Laura Ekstrand, Iowa State Univ. (United States)
Song Zhang, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 8133:
Dimensional Optical Metrology and Inspection for Practical Applications
Kevin G. Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

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