Guidelines to Enhancing the Heart-Rate Monitoring Performance of Biosensing Wearables

Abstract: In the wearable design process, a key step consists of the opto-mechanical integration of light-emitting and light-sensing elements into biosensing wrist wearables. Selecting components and geometries that minimize crosstalk and maximize signal to noise can significantly impact signal quality. This application note examines the optical and mechanical aspects to be considered for optimal performance. The optical portion focuses on the interaction of light with the skin and blood as well as selection of LEDs and photodetectors. The mechanical portion provides suggestions that increase coupling between the optics and the skin.