APPARATUS FOR BLOOD GLUCOSE MEASUREMENT BASED ON RAMAN SPECTROSCOPY
Blood glucose level measurement includes a light source configured to irradiate light to a subject; a monochrome part configured to separate wavelength components of the light that is reflected and scattered from the subject; a light receiver configured to receive the light transmitted via the monochrome part and to generate electrical signals based on the received light; and a processor configured to extract information on the blood glucose level of the subject based on a frequency shift of the light due to the Raman effect.
1 . An apparatus for measuring blood glucose level, comprising:
a light source configured to irradiate light to a subject;
a monochrome part configured to separate wavelength components of the light that is reflected and scattered from the subject;
a light receiver configured to receive the light transmitted via the monochrome part and to generate electrical signals based on the received light; and
a processor configured to extract information on the blood glucose level of the subject based on a frequency shift of the light due to the Raman effect.
2 . The apparatus of claim 1 , wherein the light source irradiates a near-infrared (NIR) ray or a mid-infrared (MIR) ray.
3 . The apparatus of claim 1 , further comprising:
a first lens disposed in front of the light source to concentrate the light irradiated by the light source.
4 . The apparatus of claim 1 , further comprising:
a first mirror disposed in front of the light source to deflect the light irradiated by the light source.
5 . The apparatus of claim 1 , further comprising:
a first wavelength plate that adjusts a polarization direction of the light irradiated by the light source.
6 . The apparatus of claim 5 , further comprising:
a second wavelength plate that adjusts a polarization direction of the light that is reflected and scattered from the subject.
7 . The apparatus of claim 4 , further comprising:
a second mirror that deflects the light that is reflected and scattered from the subject.
8 . The apparatus of claim 3 , further comprising:
a second lens disposed before the monochrome part to concentrate the light that is reflected and scattered from the subject.
9 . The apparatus of claim 1 , further comprising:
an optical filter disposed before the monochrome part to allow light of a predetermined wavelength band to be transmitted to the monochrome part.
10 . The apparatus of claim 1 , wherein a glucose level in an interstitial fluid is measured based on ratios of areas of (a) a peak at about 1450 cm −1 , (b) a peak at about 1660 cm −1 , and (c) a peak at about 1125 cm −1 .