Wang Xuan-ze, Wu Ya-jun, He Tao. Variable scale grating projection method based on from-coarse-to-fine progressive refinement[J]. Journal of Applied Optics, 2015, 36(5): 774-777. DOI: 10.5768/JAO201536.0503002
Citation: Wang Xuan-ze, Wu Ya-jun, He Tao. Variable scale grating projection method based on from-coarse-to-fine progressive refinement[J]. Journal of Applied Optics, 2015, 36(5): 774-777. DOI: 10.5768/JAO201536.0503002
shu

Variable scale grating projection method based on from-coarse-to-fine progressive refinement

  • 1.

    School of Mechanical Engineering,Hubei University of Technology, Wuhan 430068,China;

  • 2.

    Hubei Key Laboratory of Modern Manufacturing Quality Engineering,Hubei University of Technology,Wuhan 430068,China

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    • Abstract
  • In terms of the calculation of absolute phase in conventional grating projection methods, the unwrapping algorithm is applied. Due to the demand upon spatial phase continuity from the unwrapping algorithm, it is not suitable for the measurement of objects with step-height. A multi-scale fringe projection measurement was put forward to tackle this problem, and the absolute phase of high-density fringe projection could be directly gained. Through the experiment upon the quadratic fitting curve of the high-density 64 periods fringes phase measurement, within the variation range [-201,201] of the absolute phase, the fitting standard deviation reaches the precision of 0.096 63 rad.
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    • References (1)
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