The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2022
Filed:
Feb. 25, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Yujiro Tanaka, Tokyo, JP;
Takuro Tajima, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A component concentration measurement device includes a light irradiation unit that performs intensity modulation where two lights of wavelengths different from each other are intensity-modulated by signals of a same frequency and a same phase, and a measurement object is irradiated, a detecting unit that detects a photoacoustic wave generated within the measurement object due to irradiation by the light irradiation unit, and converts the detected photoacoustic wave into a first electric signal, and a processing unit that obtains a concentration of a target component contained in the measurement object, on the basis of an amplitude and a phase of the first electric signal. Light absorption coefficients of the two lights, corresponding to a background component contained in the measurement object, are equal in change amount with regard to change in temperature, and have signs different from each other.