Depth selective pH measurement and UV exposure measurement
US7656522B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 28, 2002 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Jul 15, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Raman spectrum is measured inside animal tissue, such us human skin tissue, at a selected depth from a surface the tissue. A pH value is computed using a function that assigns a pH value as a function of the measured Raman spectrum. The computation may involve computing a number representing a ratio of concentrations of a protonated and a deprotonated version of a chemical substance from the Raman spectrum and generating pH information on the basis of said number. The chemical substance is for example a form of Urocanic acid (UCA). UV exposure is measured from the weight of the spectrum of cis-UCA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.