Triple modulation experiment for a fourier transform spectrometer
US5835213A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Sep 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For a step-scanning Fourier transform spectrometer comprising an interferometer, a detector, and a digital signal processor (DSP), a method for measuring a response of a sample to multiple modulations is disclosed. In one embodiment, the method comprises the steps of utilizing the DSP to measure a phase modulation angle and a sample modulation angle; obtain an interferogram that corresponds to a calibrated static sample response by using the measured phase modulation rotation angle; obtain another interferogram which corresponds to the calibrated dynamic sample response by using both the measured phase and sample modulation rotation angles; and computing one or more spectra from the interferograms which indicates the calibrated response of said sample to the multiple modulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.