Short-Wave Infrared based, remote vital parameter detection using pulsed illumination

The field of non-invasive vital parameter detection is rapidly growing, offering improved patient care and greater comfort by reducing invasive sensors and cables. Remote photoplethysmography (rPPG) is an optical method that measures blood-volume changes in tissue microvasculature. Similar to conventional PPG, which uses LEDs and a photodiode to detect transmitted light through a finger, rPPG instead measures reflected light from selected regions of interest. Using a Sony IMX990 InGaAs sensor and an LED array covering visible and short-wave infrared wavelengths, this work extends rPPG to a multispectral video system and demonstrates its initial effectiveness.