Patent ID: 11911152
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 22:
23. A method of calibrating an apparatus for estimating a concentration of an analyte, the method comprising:
emitting first light toward an object and receiving second light reflected from the object, a concentration of an analyte in the object being a first concentration;
obtaining a first ratio of an absorption coefficient to a scattering coefficient based on the received second light;
obtaining a first absorption spectrum of the object from the obtained first ratio;
obtaining a second absorption spectrum by eliminating a first scattering correction spectrum from the first absorption spectrum, the first scattering correction spectrum corresponding to a nonlinear change in the scattering coefficient according to a wavelength of the emitted first light;
emitting third light toward the object and receiving fourth light reflected from the object, the concentration of the analyte in the object being a second concentration;
obtaining a second ratio of the absorption coefficient to the scattering coefficient based on the received fourth light;
obtaining a third absorption spectrum of the object from the obtained second ratio;
obtaining a fourth absorption spectrum of the analyte by eliminating a second scattering correction spectrum from the third absorption spectrum, the second scattering correction spectrum corresponding to the nonlinear change in the scattering coefficient according to a wavelength of the emitted third light; and
obtaining a pure component spectrum of the analyte based on the obtained second absorption spectrum and the obtained fourth absorption spectrum,
wherein the first scattering correction spectrum is expressed as a first function representing a change in a length of a light path according to the wavelength of the emitted first light; and
wherein the obtaining the second absorption spectrum comprises obtaining the second absorption spectrum by using a scattering correction model based on the function.