Patent ID: 9304202
Filing Date: 2016-04-05
CPC Classification: A61B,G01S

Claim Text:
1. A device comprising: a source emitting electromagnetic radiation through a transparent barrier; a position sensitive detector behind a first side of the barrier measuring a position and intensity of the electromagnetic radiation reflected off a body part of an organism placed on a surface of a second side of the barrier, the source modulated to reduce an effect of ambient radiation on the measurement; and electronics to calculate (a) a position of the body part on the surface of the barrier based on the position of the measured reflected radiation and (b) a photoplethysmograph from changes to the reflected light intensity; wherein the position sensitive detector measures the position of the reflected electromagnetic radiation by generating first and second currents at first and second ends, respectively, of the position sensitive detector, the first and second currents varying depending on a light distribution of the reflected electromagnetic radiation on a surface of the position sensitive detector facing the first side of the barrier.