Fourier domain dynamic correction method for complex optical fringes in laser spectrometers
US11085826B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 27, 2020 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/423
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.