	US 12,216,048 B2
	Measuring apparatus
Ryosuke Kasahara, Kanagawa (JP); Yoshio Wada, Kanagawa (JP); Yoshihiro Oba, Miyagi (JP); and Toshihide Sasaki, Kanagawa (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Appl. No. 18/014,756
Filed by Ryosuke Kasahara, Kanagawa (JP); Yoshio Wada, Kanagawa (JP); Yoshihiro Oba, Miyagi (JP); and Toshihide Sasaki, Kanagawa (JP)
PCT Filed Jul. 8, 2021, PCT No. PCT/IB2021/056110 § 371(c)(1), (2) Date Jan. 6, 2023, PCT Pub. No. WO2022/023846, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-129357 (JP), filed on Jul. 30, 2020; and application No. 2021-093778 (JP), filed on Jun. 3, 2021.
Prior Publication US 2023/0288323 A1, Sep. 14, 2023
Int. Cl. G01N 21/59 (2006.01); G01N 21/35 (2014.01)

CPC G01N 21/35 (2013.01) [G01N 2201/0634 (2013.01)]

18 Claims

1. A measuring apparatus, comprising:

a light source to emit light in a mid-infrared region, the light including:

first-wavelength light having a wave number of from 970 cm-1 or more to 1010 cm-1 or less; and

second-wavelength light different from the first-wavelength light, the second-wavelength light having a wave number of from 950 cm-1 or more to 990 cm-1 or less;

a photosensor to detect the light emitted from the light source and reflected by a measurement target; and

information processing circuitry configured to:

obtain a first absorbance of the first-wavelength light and a second absorbance of the second-wavelength light from an output of the photosensor; and

determine a biomarker of the measurement target based on the first absorbance and the second absorbance.