Apparatus and method for measuring concentrations of components with light scattering

• US 5,481,113 A
• Filed: 08/02/1994
• Issued: 01/02/1996
• Est. Priority Date: 08/05/1993
• Status: Expired due to Fees

• Current Assignee: Kyoto Daiichi Kagaku Company Limited
• Original Assignee: Kyoto Daiichi Kagaku Company Limited
• Inventors: Dou, Xiaoming, Uenoyama, Harumi
• Primary Examiner(s): Fields, Carolyn E.
• Assistant Examiner(s): Glick, Edward J.
• Application Number:
  US08/284,213
• Time in Patent Office: 518 Days
• Field of Search: 250/339.11, 250/341.8, 250/341.1, 356/301
• US Class Current: 250/341.1
• CPC Class Codes: G01N 21/359 using near infrared light
• CPC Class Codes: G01N 21/65 Raman scattering
• CPC Class Codes: G01N 33/497 of gaseous biological material, e.g. breath

Abstract

An apparatus and a method for measuring concentrations of components with light scattering allows measurement of concentrations of components in a measuring object to be accomplished in non-destructive fashion by using light in near-infrared wavelength ranges with good transmissivity and relatively low light quantum energy. The apparatus is composed of a light irradiator (1) for irradiating excited light in a near-infrared wavelength range to a measuring object (16), a photodetector (2) for receiving and spectrally separating Raman scattered light derived from the measuring object (16), and an arithmetic unit (3) for calculating concentration of a component in the measuring object (16) from intensity of the Raman scattered light and outputting a calculation result.

Claims

1. An apparatus for measuring concentrations of components with light scattering, comprising:

a light irradiator for irradiating excited light in a near-infrared wavelength range to a measuring object;

a photodetector for receiving and spectrally separating Raman scattered light derived from the measuring object; and

an arithmetic unit for calculating concentration of a component in the measuring object from intensity of the Raman scattered light and outputting a calculation result,

wherein said component is glucose and said Raman scattered light has a wave number of 1090 to 1150 cm^-1.

2. The apparatus for measuring concentrations of components with light scattering according to claim 1, wherein said light irradiator is a laser generator.

3. An apparatus for measuring concentrations of components with light scattering, comprising:

a light irradiator for irradiating excited light in a near-infrared wavelength range to a measuring object;

a photodetector for receiving and spectrally separating Raman scattered light derived from the measuring object; and

an arithmetic unit for calculating concentration of a component in the measuring object from intensity of the Raman scattered light and outputting a calculation result,

wherein said component is glucose and said Raman scattered light has a wave number of 2850 to 3000 cm^-1.

4. The apparatus for measuring concentrations of components with light scattering according to claim 3, wherein said light irradiator is a laser generator.