Source：Nature Communications

Authors：Gyeongtae Kim、Yeseul Kim、Jooyeong Yun、Junsuk Rho Etc.

Published：2022-10-10

DOI：10.1038/s41467-022-33262-1

Link：https://www.nature.com/articles/s41467-022-32117-2

Core Research Progress

Traditional Structured Light (SL) imaging is limited by micron-scale diffractive elements, suffering from narrow field-of-view (FOV) and low diffraction efficiency. This work proposes a metasurface-enhanced structured light imaging scheme. Based on subwavelength optical field modulation technology, it achieves 180° full field-of-view imaging and generates high-density laser dot arrays at the 10K level. Stereo matching algorithms are adopted to realize high-precision depth detection from multiple perspectives and long distances. Meanwhile, the nano-resin embedded imprinting (nano-PER) process enables low-cost, mass-producible fabrication of metasurface devices compatible with diverse substrates.

Technical Application Value

This technology breaks through the bottlenecks of conventional diffractive imaging. With advantages including full-space large field-of-view, high-density dot arrays, lightweight structure and mass manufacturability, it can be used to build ultra-compact 3D depth perception platforms. It is widely applicable to face recognition, automotive perception, robot vision, industrial 3D inspection and other scenarios, offering an innovative solution for the industrialization of miniaturized, high-precision and low-cost commercial 3D imaging devices.

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