METHOD AND SYSTEM FOR CARRYING OUT PHOTOPLETHYSMOGRAPHY

摘要

A method of photoplethysmography includes processing a signal (46;56) based on at least one signal (35;50) from at least one sensor (5;18-20;26;63) arranged to capture light from a living subject to extract information on a characteristic of a periodic biological phenomenon. At least one of the signals (35;50) from at least one sensor (5;18-20;26;63) is obtained by using at least one of a light source (1;11- 13) and a filter (6;17;64) placed before the at least one sensor (5;18-20;26;63) tuned to a peak in an absorption spectrum of water.