Fourier transform profilometry based on a fringe pattern with two frequency components

Wenjing Chen; Xianyu Su; Yipping Cao; Liqun Xiang; Qican Zhang

doi:10.1117/12.667958

20 January 2006 Fourier transform profilometry based on a fringe pattern with two frequency components

Wenjing Chen, Xianyu Su, Yipping Cao, Liqun Xiang, Qican Zhang

Proceedings Volume 6027, ICO20: Optical Information Processing; 60271I (2006) https://doi.org/10.1117/12.667958
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

A modified Fourier transform profilomtry (FTP) based on a fringe pattern with two frequency components is proposed. We discuss its principle, analyze the maximum measuring range and give an expression to describe the measurable slope of the height variation limitation of this method. The modified FTP provides us another approach to eliminate frequency overlapping. When the spectra distribution of a measured object is not spherical symmetry, we can avoid the frequency aliasing through projecting a fringe pattern with two frequency components, instead of increasing the density of the projected fringe and the resolution of CCD camera. The theoretical analysis and primary experiments verified the method.

Citation Download Citation

Wenjing Chen, Xianyu Su, Yipping Cao, Liqun Xiang, and Qican Zhang "Fourier transform profilometry based on a fringe pattern with two frequency components", Proc. SPIE 6027, ICO20: Optical Information Processing, 60271I (20 January 2006); https://doi.org/10.1117/12.667958

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