Method of compensating frequency drift in an interferometer
US9846078B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2011 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Mar 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/283
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Compensating for frequency drift of a reference energy source in an FT interferometer based spectrometer instrument may include obtaining data representing a reference interferogram collected in response to a trigger signal having been generated in dependence on the emission frequency of the reference energy source, and subsequently obtaining data representing a target interferogram recorded by the FT interferometer in response to a trigger signal also having been generated in dependence on the emission frequency of the reference energy source in the same manner. The method may further include comparing the obtained data to determine a phase shift between the interferograms in a window in at least one region away from center-burst, and generating a mathematical transform dependent on the determined shift to be subsequently applied to generate data representing a frequency stabilized interferogram of an unknown sample recorded by the FT interferometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.