A novel attempt for Spontaneous PPG measurement for 3D-VR viewing

Abstract

A novel photoplethysmograph (PPG) embedded in a head-mounted virtual reality (VR) headset was developed. This measurement has been attempted for spontaneous physiological measurement while VR headset using such as gaming, 3D movie viewing, working in 3D circumstances and so on. PPG was derived from subject's forehead using reflectance-type measurement of green and infrared light. PPG probes were embedded with a VR headset then, PPG were measured from subject waring it. As results, green PPG were more stable than the infrared one. Stable measurements were obtained by green PPG under several conditions such as VR monitor switching, voluntary breath holding, 3D movie viewing and so on. PPG from forehead was compared with finger/ear PPG, then found those are synchronized. It is considered that heart rate change during VR viewing is able to be measured autonomously.This work was partially supported by JSPS KAKENHI Grant Number 15H02798.