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Proceedings Paper

An Improved Fourier Transform Profilometry
Author(s): Xian-Yu Su; Jian Li; Lu-Rong Guo; Wan-Yong Su
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Paper Abstract

An improved Fourier transform profilometry for the automatic mesurement of 3-D object shapes is presented. Because of using a defocused Rouchi grating to get a qusi-sinusoidal optical field and using grating π-phase shifting technique, the fundarmental spectrum modulated by 3-D object shapes can be extended from 0 to 2f. theorily Cf. is the carrier frequency of the optical field). Consequently,the measurable rate of hight variation can be extended three times more than the unimproved FTP. This article gives the theory and experiment results of the improved FTP.

Paper Details

Date Published: 16 January 1989
PDF: 5 pages
Proc. SPIE 0954, Optical Testing and Metrology II, (16 January 1989); doi: 10.1117/12.947595
Show Author Affiliations
Xian-Yu Su, Sichuan University (China)
Jian Li, Sichuan University (China)
Lu-Rong Guo, Sichuan University (China)
Wan-Yong Su, Southwestern Petroleum Institute (China)

Published in SPIE Proceedings Vol. 0954:
Optical Testing and Metrology II
Chander Prakash Grover, Editor(s)

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