Reduction of scattering noise when using NDIR with a liquid sample
US9678000B1 · kind B1 · utility
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2References
4Claims
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Key dates
| Filing date | Feb 27, 2017 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Feb 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0696
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A concentration of glucose in a blood sample is determined through use of a signal channel output/reference channel ratio obtained by use of an NDIR absorption technique in which scattering noise attributable to the liquid phase is reduced by alternately and successively pulsing infrared radiation from signal and reference sources which are multiplexed and collimated into a pulsed beam directed through the sample space containing the liquid phase and the pulse frequency is sufficiently fast so that a given molecule of glucose will not pass in and out of the sample space within the pulse frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.