1 December 1990 Improved Fourier transform profilometry for the automatic measurement of three-dimensional object shapes
Author Affiliations +
Abstract
By using a defocused optical field with a Ronchi grating to get a quasi-sine optical field and by using a grating ? phase shifting technique, the fundamental spectrum modulated by the object height distribution can theoretically be extended from 0 to 2f0 ( f0 is the carrier frequency of the optical field) without overlapping the zero component and other higher spectra. Consequently, the measurable slope of height variation can be extended to nearly three times that of the unimproved Fourier transform profilometry method. This paper gives the theory and experiment results of the improved Fourier transform profilometry. Subject terms: pro filometry; machine vision; contouring.
Jian Li, Jian Li, Xianyu Su, Xianyu Su, Lurong Guo, Lurong Guo, } "Improved Fourier transform profilometry for the automatic measurement of three-dimensional object shapes," Optical Engineering 29(12), (1 December 1990). https://doi.org/10.1117/12.55746 . Submission:
JOURNAL ARTICLE
6 PAGES


SHARE
RELATED CONTENT

An Improved Fourier Transform Profilometry
Proceedings of SPIE (January 15 1989)
Radar Analogies For Optics
Proceedings of SPIE (December 27 1977)
Studies of Fourier transform profilometry
Proceedings of SPIE (April 03 1994)
3D shape measurement based on Hilbert transform
Proceedings of SPIE (August 18 2011)

Back to Top