Journal Article10.3390/nano14110929
Structured-Light 3D Imaging Based on Vector Iterative Fourier Transform Algorithm
Runzhe Zhang,Shuai Qiao,Yangyang Luo,Yinghui Guo,Xiaoyin Li,Qi Zhang,Yu-Chen Fan,Zeyu Zhao,Xiangang Luo +8 more
TL;DR: Structured-light 3D imaging based on vector iterative Fourier transform algorithm utilizes quasi-continuous-phase metasurfaces to impart optical parameters to light at sub-wavelength scales and achieve high-accuracy 3D imaging with low computational cost and fast imaging speed.
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Abstract: Quasi-continuous-phase metasurfaces overcome the side effects imposed by high-order diffraction on imaging and can impart optical parameters such as amplitude, phase, polarization, and frequency to incident light at sub-wavelength scales with high efficiency. Structured-light three-dimensional (3D) imaging is a hot topic in the field of 3D imaging because of its advantages of low computation cost, high imaging accuracy, fast imaging speed, and cost-effectiveness. Structured-light 3D imaging requires uniform diffractive optical elements (DOEs), which could be realized by quasi-continuous-phase metasurfaces. In this paper, we design a quasi-continuous-phase metasurface beam splitter through a vector iterative Fourier transform algorithm and utilize this device to realize structured-light 3D imaging of a target object with subsequent target reconstruction. A structured-light 3D imaging system is then experimentally implemented by combining the fabricated quasi-continuous-phase metasurface illuminated by the vertical-cavity surface-emitting laser and a binocular recognition system, which eventually provides a new technological path for the 3D imaging field.
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