Non-approximate Voigt line profile fitting method for absorption spectrum spectroscopy
US10274424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2018 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Apr 21, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/129
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a Voigt line shape fitting method, including step 1: Calculate a Gauss line shape function and a Lorentz line shape function, and calculate a Voigt line shape function. Step 2: For determined line shape parameters to be fitted, calculate partial derivatives of the Voigt line shape function with respect to the parameters, convert a partial derivative of the Voigt line shape function with respect to a parameter into a partial derivative of the Gauss line shape function or the Lorentz line shape function with respect to the parameter. Step 3: Substitute the Voigt line shape function and the partial derivative of the Voigt line shape function with respect to the parameter to be fitted, into a least squares algorithm step, perform least squares fitting calculation, and determine whether to terminate the least squares fitting calculation or return to step 1 to perform next iterative calculation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.