US 11,911,152 B2
Apparatus and method for estimating concentration of analyte, and calibration method
Jun Ho Lee, Incheon (KR); and Sang Kyu Kim, Yongin-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 31, 2020, as Appl. No. 16/836,163.
Claims priority of application No. 10-2019-0135616 (KR), filed on Oct. 29, 2019.
Prior Publication US 2021/0121102 A1, Apr. 29, 2021
Int. Cl. A61B 5/1455 (2006.01); A61B 5/145 (2006.01); A61B 5/00 (2006.01); G01J 3/02 (2006.01); G01J 3/42 (2006.01)
CPC A61B 5/1455 (2013.01) [A61B 5/14532 (2013.01); A61B 5/7275 (2013.01); G01J 3/0202 (2013.01); G01J 3/0297 (2013.01); G01J 3/42 (2013.01); A61B 2560/0233 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An apparatus for estimating a concentration of an analyte, the apparatus comprising:
an optical sensor configured to emit light toward an object and receive light reflected from the object; and
a processor configured to:
obtain a ratio of an absorption coefficient to a scattering coefficient based on the received light,
obtain a first absorption spectrum of the object based on the obtained ratio,
obtain a second absorption spectrum by eliminating a scattering correction spectrum from the first absorption spectrum, the scattering correction spectrum corresponding to a nonlinear change in the scattering coefficient according to a wavelength of the emitted light, and
estimate a concentration of an analyte based on the second absorption spectrum,
wherein the scattering correction spectrum is expressed as a function representing a change in a length of a light path according to the wavelength of the emitted light, and
wherein the processor is further configured to obtain the second absorption spectrum by using a scattering correction model that is based on the function.