Electro-Optic Technology Application, Volume. 29, Issue 4, 65(2014)
Three-dimensional Surface Figure Measurement Based on Three Step Phase-shifting
A method to measure the three-dimensional (3D) surface figure based on three step phase-shifting is proposed. Firstly, the grating projected by a projector is pre-corrected to assure standard sinusoidal fringe projected on the reference surface. Secondly, three frames of grating with same phase-shifting are projected on the surface of the tested object by a projector during measurement. Three frames of deformation fringe patterns are captured by a CCD camera and the phase is extracted from a phase calculation model. Finally, the 3D surface figure of the tested object can be reconstructed by height mapping formula. The method has stronger anti-noise ability, measurement process can still be performed in large noise environment, which lay a foundation for dynamic on-line measurement. The feasibility of this method is verified by simulations and initial experiments.
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MA Xiao-hang, ZHU Ting-ling, BIAN Xin-tian. Three-dimensional Surface Figure Measurement Based on Three Step Phase-shifting[J]. Electro-Optic Technology Application, 2014, 29(4): 65
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Received: May. 28, 2014
Accepted: --
Published Online: Sep. 15, 2014
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CSTR:32186.14.