Spectrophotometer calibration methods and systems
US11181422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2019 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of calibrating a spectrophotometer comprising a flash lamp. The method comprises receiving light from the flash lamp at a monochromator of the spectrometer, wherein the flash lamp is a short arc noble gas flash lamp with transverse or axially aligned electrodes; configuring the monochromator to progressively transmit the received light at each of a plurality wavelengths of a selected range of wavelengths, wherein the range of wavelengths is associated with a wavelength feature according to a known spectral profile of the flash lamp, and wherein the wavelength feature is a self-absorption feature; and determining a spectrum of the flash lamp, wherein the spectrum comprises a corresponding power or intensity value for each of the plurality of wavelengths. The method further comprises determining a wavelength calibration error value for the wavelength feature by comparing the spectrum with a segment of a predetermined reference spectrum associated with the flash lamp, wherein the segment of the predetermined reference spectrum includes one or more wavelengths associated with the self-absorption feature; and calibrating the spectrophotometer based on the wavelength calibration…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.