OPTICAL ANALYSIS SYSTEM AND METHOD Russian patent published in 2019 - IPC A61B5/26 A61B5/24 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment, specifically to optical analysis means. Optical analysis system for measuring heart rate and blood oxygen saturation comprises a light source for illuminating an analyzed sample, a driver for controlling a light source, a photodetector for receiving light reflected by the analyzed sample or passed through it, and generating a sensor signal, a first signal processing circuit for processing a sensor signal, comprising a trans-coupled amplifier, a second signal processing circuit for processing an electrical signal from the driver and characterizing the control signal supplied to the light source, wherein the second signal processing circuit comprises a filter with a frequency response of the filter corresponding to the frequency characteristic of the transimpedance amplifier, and a compensation circuit for further processing of the sensor signal to improve the signal-to-noise ratio using the processed electrical signal. Method of optical analysis for measuring heart rate and blood oxygen saturation is performed by means of a system.

EFFECT: use of inventions increases signal-to-noise ratio while reducing costs for LED driver.

13 cl, 5 dwg