Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness

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ID: 112531
2020
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Abstract
Many camera-based remote photoplethysmography (PPG) applications require sensing in near infrared (NIR). The performance of PPG systems benefits from multi-wavelength processing. The illumination source in such system is explored in this paper. We demonstrate that multiple narrow-band LEDs have inferior color homogeneity compared to broadband light sources. Therefore, we consider the broadband option based on phosphor material excited by LEDs. A first prototype was realized and its details are discussed. It was tested within a remote-PPG monitoring scenario in darkness and the full system demonstrates robust pulse-rate measurement. Given its accuracy in pulse rate extraction, the proposed illumination principle is considered a valuable asset for large-scale NIR-PPG applications as it enables multi-wavelength processing, lightweight set-ups with relatively low-power infrared light sources.
Reference Key
wang2020sensorscontinuous-spectrum Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wenjin Wang;Luc Vosters;Albertus C. den Brinker;Wang, Wenjin;Vosters, Luc;den Brinker, Albertus C.;
Journal sensors
Year 2020
DOI
10.3390/s20113044
URL
https://doi.org/10.3390/s20113044
Keywords
camera photoplethysmography illumination vital signs monitoring biomedical sensing near infrared

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