Photoplethysmogram (PPG) measures blood volume changes in blood vessels. The changes reflect the heart rate and the blood oxygen concentration. 465-nm, 520-nm, 660-nm, 805-nm and 940-nm are typical wavelengths used. It has been implanted to wearable devices, such as smart watch, smart glasses.
Photoplethysmogram (PPG) measures blood
volume changes in blood vessels. The changes reflect the heart rate and
the blood oxygen concentration. 465-nm, 520-nm, 660-nm, 805-nm and
940-nm are typical wavelengths used. It has been implanted to wearable
devices, such as smart watch, smart glasses.
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