We propose a bandwidth-limited imaging system based on a digital micromirror device (DMD) for three-dimensional (3D) structured light profilometry. By using an error diffusion algorithm with optical low-pass filtering, we obtain high-quality sinusoidal fringe patterns without mirror dithering. An N-step phase-shifting algorithm is then used to recover depth information from objects. Using our bandwidth-limited projector, we demonstrate 3D profilometry of a static object.
Cheng Jiang, Patrick Kilcullen, Xianglei Liu, Tsuneyuki Ozaki, and Jinyang Liang, "Three-dimensional structured light profilometry using a bandwidth-limited projector," Proc. SPIE 10932, Emerging Digital Micromirror Device Based Systems and Applications XI, 109320K (Presented at SPIE OPTO: February 06, 2019; Published: 4 March 2019); https://doi.org/10.1117/12.2510145.
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