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Proceedings Paper

Automatic 360-deg profilometry of a 3D object using a shearing interferometer and virtual grating
Author(s): Yong-Lin Zhang; Guixue Bu
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Paper Abstract

Phase measuring technique has been widely used in optical precision inspection for its extraordinary advantage. We use the phase-measuring technique and design a practical instrument for measuring 360 degrees profile of 3D object. A novel method that can realize profile detection with higher speed and lower cost is proposed. Phase unwrapping algorithm based on the second order differentiation is developed. A complete 3D shape is reconstructed from a series of line- section profiles corresponding to discrete angular position of the object. The profile-jointing procedure is only related with two fixed parameters and coordination transformation.

Paper Details

Date Published: 3 October 1996
PDF: 8 pages
Proc. SPIE 2899, Automated Optical Inspection for Industry, (3 October 1996); doi: 10.1117/12.253035
Show Author Affiliations
Yong-Lin Zhang, Jinan Univ. (China)
Guixue Bu, Shenzhen Univ. (China)

Published in SPIE Proceedings Vol. 2899:
Automated Optical Inspection for Industry
Frederick Y. Wu; Shenghua Ye, Editor(s)

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