Triple modulation experiment for a fourier transform spectromete

Details Triple modulation experiment for a fourier transform spectromete Triple modulation experiment for a fourier transform spectromete

1996-09-13

1998-11-10

Font, Frank G.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

058352139

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.

REFERENCES:
patent: 5450196 (1995-09-01), Turner

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