PHOTOACOUSTIC PHYSICAL PROPERTY MEASURING DEVICE AND MEASURING METHOD

WIPO Patent Application WO/2023/281967

A1

In order to enable a photoacoustic physical property measuring device to cope relatively easily with changes in resonant frequency resulting, for example, from the arrangement state of an object being measured, or the state of a gap between a photoacoustic cell and the object being measured, and to enable a physical property of a target object to be measured in a relatively short time without causing a deterioration in detection sensitivity, this photoacoustic physical property measuring device comprises: a light emitting unit for emitting modulated light onto the target object; said photoacoustic cell for amplifying a photoacoustic wave generated by the target object as a result of the emission of the modulated light from the light emitting unit; a sound wave generating unit for generating a sound wave inside the photoacoustic cell; a microphone for detecting the photoacoustic wave that has been amplified by the photoacoustic cell, and the sound wave generated inside the photoacoustic cell from the sound wave generating unit; and a physical property analyzing unit for analyzing the physical property of the target object on the basis of the photoacoustic wave detected by the microphone.

KOHMU NAOHIRO (JP)
ONO GOICHI (JP)
KATAGISHI MAKOTO (JP)
DOI HIDEAKI (JP)
SHIRAMIZU NOBUHIRO (JP)

PCT/JP2022/023041

January 12, 2023

June 08, 2022

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HITACHI HIGH TECH CORP (JP)

G01N29/24

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CN106644942A	2017-05-10
CN107607476A	2018-01-19
JP2017173055A	2017-09-28
US20150204822A1	2015-07-23
US6608683B1	2003-08-19
US20060290944A1	2006-12-28
US20190017893A1	2019-01-17
CN102721645A	2012-10-10

POLAIRE I.P.C. (JP)

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