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11 June 2024 Compact depth perception from integration of metasurface and PCSEL
Yao-Wei Huang
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Proceedings Volume PC12991, Nanophotonics X; PC1299113 (2024) https://doi.org/10.1117/12.3017190
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
We demonstrated a novel depth sensing system that utilizes metasurfaces and Photonic Crystal Surface-Emitting Lasers (PCSELs), realizing structured light generation and facial recognition in monocular depth sensing. Our single-shot system projects approximately 45,700 infrared spots from a 2972 μm2 metasurface area, which is 233 times smaller than the commercial DOE-based dot projector used in the Face ID on iPhone. The proposed system provides a measured Field-of-View (FOV) of 158°. The system is lens-free and power consumption due to the utilization of PCSEL, reducing five to ten times of power compared to VCSEL-array based dot projectors.
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Yao-Wei Huang "Compact depth perception from integration of metasurface and PCSEL", Proc. SPIE PC12991, Nanophotonics X, PC1299113 (11 June 2024); https://doi.org/10.1117/12.3017190
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KEYWORDS
Projection systems
Structured light
Depth maps
Diffractive optical elements
Power consumption
Sensing systems
Vertical cavity surface emitting lasers
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