Super‐Large Field‐of‐View, High‐Accurate and Real‐Time 3D Scene Reconstruction Based on Metasurface‐Enabled Structured Light.

Three‐dimensional (3D) reconstruction based on structured light (SL) has wide applications in fields such as artificial intelligence, surveying and mapping, and precision manufacturing. An ideal 3D reconstruction system features both wide field‐of‐views (FOV), high‐accuracy and high‐speed reconstruction and ultracompact volume. However, these criteria have been achieved only partially with conventional SL techniques like optical projector and differentiate optical element, which will substantially limit their practical applications. In this study, an ultracompact SL and its 3D reconstruction system is designed and experimentally demonstrated, which exhibits super‐large FOV angles up to 210° × 210°, only 3.8‰ reconstruction errors, real‐time processing speeds up to 30 fps and SL dimensions as small as 0.3 mm × 0.3 mm. Specifically, the SL is realized with a resonant geometric metasurface, which can produce tens of thousands of random dots and project them into the whole 4π free space. The metasurface enabled SL is collaborated with a binocular stereoscopic camera and advanced 3D reconstruction algorism to form a practical 3D reconstruction system, which can provide robust hardware and software support for high‐accuracy and real‐time 3D scene reconstruction. [ABSTRACT FROM AUTHOR]