Three-Dimensional Shape Measuring Method Based on Dual-Frequency Digital Moiré Fringe  

作　　者：Hu Hailing He Renji Chen Yang Zhang Peiqing Shen Xiang Da Shixun Song Baoan 

机构地区：[1]Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,Zhejiang,China [2]The Research Institute of Advanced Technologies,Ningbo University,Ningbo 315211,Zhejiang,China [3]Key Laboratory of Photoelectric Detecting Materials and Devices of Zhejiang Province,Ningbo 315211,Zhejiang,China [4]Ningbo Institute of Oceanography,Ningbo University,Ningbo 315211,Zhejiang,China [5]Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province,Ningbo 315211,Zhejiang,China

出　　处：《激光与光电子学进展》2023年第8期394-401,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62075109,62135011);宁波大学王宽诚幸福基金。

摘　　要：A dual-frequency digital Moiré measurement method(DFDM) is proposed for the three-dimensional(3D) shape measurement of an object.The high-and low-frequency fringes are modulated separately along orthogonal direction using different carrier frequencies before being projected onto the measured object.After collecting and demodulating the composite fringe,the digital π phase shift is used to remove the DC component of the demodulated fringes,resulting in high-precision Moiré fringes for calculating the wrapped phase.The unwrapping of the high-frequency wrapped phase is guided by the low-frequency phase to further realistically reconstruct the surface of the measured object.When compared with existing single-shot digital Moiré profilometry,DFDM effectively removes the DC component of the fringe and calculates the phase more accurately.

关 键 词：3D measurement DUAL-FREQUENCY digital Moiréfringe digitalπphase shift 

分 类 号：O43[机械工程—光学工程]