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Zonghua Zhang, Yue Liu
Scientific Reports,2017,7(10293):10293
2017年07月10日
With the advent of intelligent manufacturing, phase measuring deflectometry (PMD) has been widely studied for the measurement of the three-dimensional (3D) shape of specular objects. However, existing PMDs cannot measure objects having discontinuous specular surfaces. This paper presents a new direct PMD (DPMD) method that measures the full-field 3D shape of complicated specular objects. A mathematical model is derived to directly relate an absolute phase map to depth data, instead of the gradient. Two relevant parameters are calibrated using a machine vision-based method. On the basis of the derived model, a full-field 3D measuring system was developed. The accuracy of the system was evaluated using a mirror with known positions along an accurate translating stage. The 3D shape of a monolithic multi-mirror array having multiple specular surfaces was measured. Experimental results show that the proposed DPMD method can obtain the full-field 3D shape of specular objects having isolated and/or discontinuous surfaces accurately and effectively.
Phase measuring deflectometry, Specular surface, 3D shape measurement
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【期刊论文】An iterative distortion compensation algorithm for camera calibration based on phase target
张宗华
Sensors, 2017, 17(6): 1188,-0001,():
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Yongjia Xu, Feng Gao, Hongyu Ren, Zonghua Zhang, and Xiangqian Jiang.
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张宗华, Yongjia Xu, Chao Chen, Shujun Huang, Zonghua Zhang*
Optics and Lasers in Engineering, 2014, 61(1): 1-7,-0001,():
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张宗华, Zonghua Zhang, Zhao Jing, Zhaohui Wang, and Dengfeng Kuang.
Optics and Lasers in Engineering, 2012, 50(8): 1152-1160.,-0001,():
-1年11月30日
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张宗华, Zonghua Zhang.
Optics and Lasers in Engineering. 2012, 50(8): 1097-1106.,-0001,():
-1年11月30日
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