科研之友
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摘要
At present, the analysis about maximum measuring range of Fourier transform profilometry (FTP) given by Takeda is fit for fringe pattern with single direction frequency carrier. When fringe pattern with two directions frequency carrier is projected onto the object, the limitation of measuring range have not been given. So the maximum measuring range of FTP projected this kind of fringe pattern was analyzed and an expression was given. It shows that we can avoid the frequency aliasing by changing the direction of the frequency carrier when the spectra distribution of the measured object is not spherical symmetry, without increasing the density of the projected fringe and resolution of CCD camera.
- 出版日期2004
- 单位四川大学
