Method and apparatus for multi-spectral analysis in noninvasive NIR spectroscopy
US5945676A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1998 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jan 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/359
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is provided for determining the concentration of an analyte present in a sample using multi-spectral analysis in the near-infrared (NIR) range. Incident radiation containing a plurality of distinct, nonoverlapping spectral regions of wavelengths in the near-infrared range is used to irradiate the sample. Diffusively reflected radiation emerging from the sample is detected, and a value indicative of the concentration of the analyte is obtained therefrom, preferably using an application of chemometrics techniques. Information obtained from each of the nonoverlapping spectral regions of wavelengths can be cross-correlated to remove background interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.