3D Measurement Based on Structured Light Digital Micromirror Projection System

In order to achieve high precision 3d morphology reduction, this paper adopts the projection method with digital grating as the structured light generator, builds an experimental platform for 3D measurement based on digital micromirror, and combines the coded complementary Gray code for phase unwrapping operation in the algorithm of restoring the 3D shape of the object. The experimental results show that clear 3D object shape restoration is achieved in the time domain, and the measurement uncertainty reaches
$\pm \ 2.45\ \mu\mathrm{m}$
as verified by repeatability experiments.