Next Article in Journal
WatchPose: A View-Aware Approach for Camera Pose Data Collection in Industrial Environments
Next Article in Special Issue
Sensors and Systems for Physical Rehabilitation and Health Monitoring—A Review
Previous Article in Journal
Double Role of Diphenylpyridine Derivatives as Fluorescent Sensors for Monitoring Photopolymerization and the Determination of the Efficiencies of the Generation of Superacids by Cationic Photoinitiators
Previous Article in Special Issue
An Improved Strategy for Detection and Localization of Nodules in Liver Tissues by a 16 MHz Needle Ultrasonic Probe Mounted on a Robotic Platform
Article

Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness

1
Philips Research, 5656 AE Eindhoven, The Netherlands
2
Philips Intellectual Property & Standards, 5656 AE Eindhoven, The Netherlands
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(11), 3044; https://doi.org/10.3390/s20113044
Received: 15 April 2020 / Revised: 10 May 2020 / Accepted: 20 May 2020 / Published: 27 May 2020
(This article belongs to the Collection Medical Applications of Sensor Systems and Devices)
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. View Full-Text
Keywords: vital signs monitoring; photoplethysmography; biomedical sensing; camera; near infrared; illumination vital signs monitoring; photoplethysmography; biomedical sensing; camera; near infrared; illumination
Show Figures

Figure 1

MDPI and ACS Style

Wang, W.; Vosters, L.; den Brinker, A.C. Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness. Sensors 2020, 20, 3044. https://doi.org/10.3390/s20113044

AMA Style

Wang W, Vosters L, den Brinker AC. Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness. Sensors. 2020; 20(11):3044. https://doi.org/10.3390/s20113044

Chicago/Turabian Style

Wang, Wenjin, Luc Vosters, and Albertus C. den Brinker 2020. "Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness" Sensors 20, no. 11: 3044. https://doi.org/10.3390/s20113044

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop