Reverse intensity correction for Raman spectral library search
US10345242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2017 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Oct 2, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/656
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention discloses a Reverse Intensity Correction method for spectral library search to correct for instrument response without the side effect of magnifying the noise in the low responsivity region of test spectra. Instead of applying relative intensity correction to the sample test spectra to match the standardized library spectra, a reverse intensity correction is applied to the standardized library spectra to match the uncorrected sample spectrum. This simple procedural change improves library search performance, especially for dispersive CCD Raman analyzers using NIR excitations, where the instrument response often varies greatly across the spectral range, and SNR in the low responsivity regions is typically poor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.