Infrared and Laser Engineering, Volume. 45, Issue 6, 617006(2016)
3D shape measurement method combining sinusoidal pulse width modulation fringe with phase coding fringe
A 3D shape measurement method combining sinusoidal pulse width modulation fringe with phase coding fringe was proposed. Two kinds of coding fringes were projected onto the object with defocus. Using a phase-shift algorithm, the wrapped phase was obtained by the sinusoidal pulse width modulation fringe, the fringe order was got by the phase coding fringe. Then, the three-dimensional shape of the measurement object can be restored. The experimental results demonstrate that the proposed method has two merits: (1) It can decrease the measurement error because of filtering the harmonics with slight defocus; (2) It can measure the different contrast object because it is based on phase code.
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Li Biao, Wu Haitao, Zhang Jiancheng, Fu Yanjun. 3D shape measurement method combining sinusoidal pulse width modulation fringe with phase coding fringe[J]. Infrared and Laser Engineering, 2016, 45(6): 617006
Category: 光电测量
Received: Oct. 5, 2015
Accepted: Nov. 3, 2015
Published Online: Jul. 26, 2016
The Author Email: Biao Li (jjudianzia0831@163.com)