Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

4.4K
When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
4.4K
IR Spectrometers01:25

IR Spectrometers

2.1K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Vancomycin-stressed <i>Staphylococcus aureus</i> extracellular vesicles hijack macrophage autophagy to enhance bacterial intracellular survival.

Autophagy·2026
Same author

Non-contact Heart Sound Measurement by Defocused Speckle Imaging.

IEEE journal of biomedical and health informatics·2026
Same author

Mass school testing for Mycobacterium tuberculosis infection and disease in an adolescent population: A prospective cohort from eastern China.

Journal of epidemiology·2026
Same author

Converting a Cough Counter into a Cough Monitor: A Way Forward?

Medical sciences (Basel, Switzerland)·2026
Same author

Tumor Budding Is a Promising Indicator for Elective Neck Dissection in Node-Negative Early-Stage Oral Squamous Cell Carcinoma: A Retrospective Cohort Study.

Oral diseases·2026
Same author

The Efficacy and Safety of Etrasimod in Mildly to Moderately Active Ulcerative Colitis: Results From the Phase II GLADIATOR Trial.

Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association·2026

Related Experiment Video

Updated: Dec 20, 2025

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function
11:35

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function

Published on: December 8, 2010

16.8K

Continuous-Spectrum Infrared Illuminator for Camera-PPG in Darkness.

Wenjin Wang1, Luc Vosters2, Albertus C den Brinker1

  • 1Philips Research; 5656 AE Eindhoven, The Netherlands.

Sensors (Basel, Switzerland)
|May 31, 2020
PubMed
Summary

This study introduces a novel broadband light source for near-infrared remote photoplethysmography (PPG) systems. The new system offers robust pulse-rate measurement, enabling multi-wavelength processing for enhanced performance in large-scale applications.

Keywords:
biomedical sensingcamerailluminationnear infraredphotoplethysmographyvital signs monitoring

More Related Videos

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
06:28

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

Published on: October 7, 2014

13.7K
Fluorescence Lifetime Macro Imager for Biomedical Applications
06:01

Fluorescence Lifetime Macro Imager for Biomedical Applications

Published on: April 7, 2023

1.0K

Related Experiment Videos

Last Updated: Dec 20, 2025

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function
11:35

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function

Published on: December 8, 2010

16.8K
Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
06:28

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

Published on: October 7, 2014

13.7K
Fluorescence Lifetime Macro Imager for Biomedical Applications
06:01

Fluorescence Lifetime Macro Imager for Biomedical Applications

Published on: April 7, 2023

1.0K

Area of Science:

  • Biomedical Engineering
  • Optical Sensing
  • Photoplethysmography (PPG)

Background:

  • Camera-based remote photoplethysmography (PPG) often requires near-infrared (NIR) sensing.
  • Multi-wavelength processing can significantly improve PPG system performance.
  • Existing narrow-band LED illumination sources exhibit poor color homogeneity.

Purpose of the Study:

  • To explore and develop an improved illumination source for NIR-PPG applications.
  • To enable multi-wavelength processing capabilities in remote PPG systems.
  • To demonstrate a robust and accurate pulse-rate measurement system.

Main Methods:

  • Investigated broadband light sources using phosphor material excited by LEDs as an alternative to narrow-band LEDs.
  • Designed and realized a first prototype of the broadband illumination system.
  • Tested the prototype in a remote-PPG monitoring scenario in darkness.

Main Results:

  • Demonstrated that broadband light sources offer superior color homogeneity compared to multiple narrow-band LEDs.
  • The developed system showed robust pulse-rate measurement in a dark environment.
  • Achieved accurate pulse rate extraction, validating the illumination principle.

Conclusions:

  • The proposed broadband illumination principle is a valuable advancement for large-scale NIR-PPG applications.
  • This approach facilitates multi-wavelength processing, enhancing PPG system capabilities.
  • The system enables lightweight, low-power setups for effective remote pulse monitoring.