Grouped molecular absorption line wavelength calibration apparatus and method
US10612977B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2018 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Oct 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wavelength calibration apparatus includes a light source configured to deliver a backlight beam characterized by a backlight spectrum. The apparatus includes a gas reference cell configured to absorb light from the backlight beam and transmit an imprinted light beam characterized by an imprinted light spectrum. The apparatus further includes a spectrometer configured to (i) receive the transmitted imprinted light beam from the gas reference cell and to apply a plurality of reference spectral selection factors to spectrally resolve the imprinted light beam into reference indicia groups, (ii) detect a plurality of reference spectral power readings, and (iii) deliver a reference dataset for associating the reference spectral power readings with the reference spectral selection factors. A wavelength calibrator of the apparatus determines a wavelength calibration factor based on a difference between the reference dataset and a standard dataset. A wavelength-corrective light source includes the calibration apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.