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13 March 2024 Compact structured light generation and depth perception from integration of metasurface and photonic crystal surface-emitting laser
Wen-Cheng Hsu, Yu-Heng Hong, Chia-Hsun Chang, Hao-Chung Kuo, Yao-Wei Huang
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Proceedings Volume PC12897, High Contrast Metastructures XIII; PC1289709 (2024) https://doi.org/10.1117/12.3001053
Event: SPIE OPTO, 2024, San Francisco, California, United States
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 10,000 infrared spots from a 300^2 μm^2 metasurface area, which is 233 times smaller than the commercial DOE-based dot projector used in the Face ID on iPhone. The system is lens-free and power consumption due to the utilization of PCSEL, reducing 5-10 times of power compared to VCSEL-array based dot projectors.
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Wen-Cheng Hsu, Yu-Heng Hong, Chia-Hsun Chang, Hao-Chung Kuo, and Yao-Wei Huang "Compact structured light generation and depth perception from integration of metasurface and photonic crystal surface-emitting laser", Proc. SPIE PC12897, High Contrast Metastructures XIII, PC1289709 (13 March 2024); https://doi.org/10.1117/12.3001053
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KEYWORDS
Structured light
Laser crystals
Photonic crystals
Projection systems
Depth maps
Diffractive optical elements
Power consumption
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