FOREHEAD MOUNTED BIOMETRIC SENSOR WITH MOTION ARTIFACT REDUCING SYSTEM AND METHOD

摘要

A biometric sensor includes an optical transmitter and optical receiver facing a patient's skin and an accelerometer which are attached to a headband for positioning on the patient's forehead. An optical signal is emitted from the optical transmitter onto the patient's forehead and reflected signals are received at the optical receiver. The accelerometer produces an output corresponding to motion of the patient. The output of the optical receiver is processed to extract biometric information and is filtered according to the output of the accelerometer to reduce artifacts in the optical receiver output caused by movement of the patient.