Patent ID: 9546902
Date: 2017-01-17
CPC Classifications: G01J,G01N

Claim:
1. A method of correcting for the effects of intensity fluctuations of incident light within an absorption spectroscopy system, comprising the steps of: controlling a light source to emit a wavelength modulated beam of light using a controller; applying, using the controller, at least one modulation burst signal to perform one or more of modulating the wavelength modulated beam or modulating a separate beam synchronised with the wavelength modulated beam, which at least one modulation burst signal is a tapering signal modulation; detecting, at a detector, the modulated beam(s) of light after transmission through a sample medium; and processing, using an electronic detection system coupled to the detector, the detected beam(s) to obtain at least one detected burst signal and to measure absorption effects of one or more measurands, wherein the processing includes comparing the at least one detected burst signal with the applied at least one modulation burst signal to determine intensity fluctuations of the incident light that are separate from absorption effects of the measurand(s), and correcting for the effects of the determined intensity fluctuations for increased accuracy of measurement of the absorption effects of the measurand(s).