• Infrared and Laser Engineering
  • Vol. 45, Issue 6, 617006 (2016)
Li Biao*, Wu Haitao, Zhang Jiancheng, and Fu Yanjun
Author Affiliations
  • [in Chinese]
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    DOI: 10.3788/irla201645.0617006 Cite this Article
    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 Copy Citation Text show less

    Abstract

    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.
    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
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