METHOD FOR NONINVASIVE OPTICAL DETERMINATION OF AMBIENT TEMPERATURE Russian patent published in 2013 - IPC G01J5/60 G01N21/25 

FIELD: physics.

SUBSTANCE: disclosed is a method for noninvasive optical determination of temperature of pulsating blood inside the body, wherein the analysed medium is irradiated with infrared and/or visible light in the region of the absorption spectral line, the position of which depends on temperature of the medium. Light absorption is measured in the region of the absorption spectral line and temperature is determined based on said measurement by comparing with calibration data. The method is characterised by that the medium is irradiated with radiation with at least two discrete wavelengths which, in the region of the absorption spectral line, are located on different sides of the absorption maximum. At least one temperature dependent measured value is determined based on the ratio of said two absorption values. Temperature is determined based on said measured value by comparing with previously obtained calibration data.

EFFECT: high accuracy of determining ambient temperature.

10 cl, 5 dwg