A Pitch-variation Moiré Fringes Method of Temporal Phase Unwrapping Profilometry  

作　　者：Tian Jin-dong Peng Xiang Zhao Xiao-bo 

机构地区：[1]Key laboratory of Optoelectronic Devices and Systems of Education Ministry, Institute of Optoelectronics, ShenzhenUniversity, Shenzhen 518060, China

出　　处：《Optoelectronics Letters》2007年第3期215-218,共4页光电子快报（英文版）

基　　金：This work is supported by Natural Science Foundation of China (60275012);Natural Science Foundation of Guangdong province(06028584);Science & Technology Bureau of Shenzhen(200619).

摘　　要：A method of pitch-variation moiré fringes is proposed to realize the temporal phase unwrapping for three-dimensional profilometry. On the basis of the principle of moiré pattern,we achieve variable spatial frequencies of fringes in a moiré pattern by rotating two gratings. Furthermore a five-point fitting method is used to automatically compute the central position of side-lobe spectrum of the moiré fringes. Finally,a generalized temporal phase unwrapping algorithm is intro-duced to process the three-dimensional reconstruction. The theoretical analysis and experimental results show the validity of the proposed method.A method of pitch-variation moire fringes is proposed to realize the temporal phase unwrapping for three-dimensional profilometry. On the basis of the principle of moire pattern, we achieve variable spatial frequencies of fringes in a moire pattern by rotating two gratings. Furthermore a five-point fitting method is used to automatically compute the central position of side-lobe spectrum of the moire fringes. Finally, a generalized temporal phase unwrapping algorithm is introduced to process the three-dimensional reconstruction. The theoretical analysis and experimental results show the validity of the proposed method.

关 键 词：表面光洁度测量法 节距变分 莫尔条纹法 位相展开 

分 类 号：TB863[一般工业技术—摄影技术] TB96[机械工程—光学工程]