Three-dimensional shape measurement of small object based on tri-frequency heterodyne method

被引：5
|
作者：
Liu, Shouqi [1 ]
Feng, Wei [1 ]
Zhang, Qican [1 ]
Liu, Yuankun [1 ]
机构：
[1] Sichuan Univ, Optoelect Dept, Chengdu 641004, Peoples R China
来源：
2015 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: OPTOELECTRONIC MEASUREMENT TECHNOLOGY AND SYSTEMS | 2015年 / 9623卷
关键词：
Three dimensional shape measurement; small object; phase shifting; tri-frequency heterodyne; temporal phase unwrapping; FOURIER-TRANSFORM PROFILOMETRY;
D O I：
10.1117/12.2193484
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Among temporal phase unwrapping methods based on structured light projection, tri-frequency heterodyne method, with the merits of less projected fringe, high precision and high reliability, has become a practical method in objects three-dimensional (3D) shape measurement. In this paper, a 3D shape measuring system was developed with a digital micromirror device (DMD) and synchronously trigged CCD camera. The 3D shape of a measured object was reconstructed from the deformed fringe patterns based on tri-frequency heterodyne method. The practical experiments were carried on some coins, and the results show that the system can restore their 3D shape on the tested partition with an accuracy of microns. This measurement system is prominent in 3D shape measurement of small or tiny objects, sample testing, and many other application fields.
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收藏
页数：5
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