Opto-Electronic Engineering, Volume. 37, Issue 3, 144(2010)
3-D Surface Shape Restoration for Breaking Surface of Dynamic Process Based on Two-frequency Grating
In the quick change process of impact or blast, sampling rate of CCD is lower than object move rate, which result in deficiency of CCD’s sampling. A novel method based on Fourier Transform Profilometry (FTP) was proposed, in which a two-frequency sine patterns is projected onto the object and the deformed fringe is captured by CCD. Some problems caused by deficiency of sampling and breaking fringes were solved in 3-D phase unwrapping by using the low-frequency grating unwrapping phase marked fringes. The same rank of high-frequency deformed fringes was tracked by marked fringes, and 3-D phase unwrapping by high-frequency grating fringes was obtained. Computer simulation experiment and glazed tile rupture experiment proves the feasibility of this method.
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REN Wei-feng, SU Xian-yu, XIANG Li-qun. 3-D Surface Shape Restoration for Breaking Surface of Dynamic Process Based on Two-frequency Grating[J]. Opto-Electronic Engineering, 2010, 37(3): 144
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Received: Jul. 23, 2009
Accepted: --
Published Online: Jun. 13, 2010
The Author Email: Wei-feng REN (renweifeng301@163.com)