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Constituent concentration measuring apparatus and constituent concentration measuring apparatus controlling method
US9198580B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9198580-B2 |
| Application number | US-201213669246-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 5, 2012 |
| Priority date | May 6, 2004 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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Abstract
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An object of the present invention is to provide a noninvasive constituent concentration measuring apparatus and constituent concentration measuring apparatus controlling method, in which accurate measurement can be performed by superimposing two photoacoustic signals having the same frequency and reverse phases to nullify the effect from the other constituent occupying large part of the object to be measured. The constituent concentration measuring apparatus according to the invention includes light generating means for generating two light beams having different wavelengths, modulation means for electrically intensity-modulating each of the two light beams having different wavelengths using signals having the same frequency and reverse phases, light outgoing means for outputting the two intensity-modulated light beams having different wavelengths toward a test subject, and acoustic wave detection means for detecting an acoustic wave generated in the test subject by the outputted light.
First claim
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The invention claimed is: 1. A constituent concentration measuring apparatus comprising: light generating means for generating light; light modulation means for electrically intensity-modulating the light at a constant frequency, the light being generated by the light generating means for generating light; light outgoing means for outputting the intensity modulated light toward a test subject, the intensity modulated light being intensity-modulated by the light modulation mea…
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Human Necessities · mapped topic
Physics · mapped topic
Human Necessities · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US9198580B2 cover?
- An object of the present invention is to provide a noninvasive constituent concentration measuring apparatus and constituent concentration measuring apparatus controlling method, in which accurate measurement can be performed by superimposing two photoacoustic signals having the same frequency and reverse phases to nullify the effect from the other constituent occupying large part of the object…
- Who is the assignee on this patent?
- Nippon Telegraph & Telephone
- What technology area does this patent fall under?
- Primary CPC classification A61B5/0095. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Dec 01 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).