Optical spectrometer
AssigneeThermo Fisher Scientific (Bremen) GmbH
InventorsLutz Frommberger, Hans-Jurgen Schluter, Konstantin Ayzikov, Antonella Guzzonato
Life of this patent
Estimating the term…
Abstract
A method of optical spectroscopy for analysing a sample using an optical spectrometer is provided. The method comprises obtaining a sample spectrum of the sample using the optical spectrometer and obtaining a blank spectrum using the optical spectrometer. The blank spectrum comprises structured background radiation which is correlated with the sample spectrum. A cross-correlation of the sample spectrum and the blank spectrum is determined. A mapped blank spectrum is generated by mapping the blank spectrum to the sample spectrum based on the cross-correlation, and the mapped blank spectrum is subtracted from the sample spectrum to generate a background corrected sample spectrum.
Claims19
A method of optical spectroscopy for analysing a sample using an optical spectrometer comprising:
- obtaining a sample spectrum of the sample using the optical spectrometer;
- obtaining a blank spectrum using the optical spectrometer, the blank spectrum comprising structured background radiation which is correlated with the sample spectrum;
- determining a cross-correlation of the sample spectrum and the blank spectrum, wherein the cross-correlation of the sample spectrum and the blank spectrum is determined based on a region of the sample spectrum and a corresponding region of the blank spectrum where only the structured background radiation is present;
- generating a mapped blank spectrum by mapping the blank spectrum to the sample spectrum based on the cross-correlation;
- subtracting the mapped blank spectrum from the sample spectrum to generate a background corrected sample spectrum;
- and
- displaying the background corrected sample spectrum.
An optical spectrometer for analysing a sample, the optical spectrometer comprising a detector and a controller, wherein the controller is configured to cause the optical spectrometer to:
- obtain a sample spectrum of the sample using the detector;
- obtain a blank spectrum using the detector, the blank spectrum comprising structured background radiation which is correlated with the sample spectrum;
- determine a cross-correlation of the sample spectrum and the blank spectrum, wherein the cross-correlation of the sample spectrum and the blank spectrum is determined based on a region of the sample spectrum and a corresponding region of the blank spectrum where only the structured background radiation is present;
- generate a mapped blank spectrum by mapping the blank spectrum to the sample spectrum based on the cross-correlation;
- and
- subtract the mapped blank spectrum from the sample spectrum to generate a background corrected sample spectrum.
A non-transitory computer-readable medium having stored thereon processor-executable instructions which, when executed, cause an optical spectrometer to carry out a method of optical spectroscopy, comprising:
- obtaining a sample spectrum of a sample using the optical spectrometer;
- obtaining a blank spectrum using the optical spectrometer, the blank spectrum comprising structured background radiation which is correlated with the sample spectrum;
- determining a cross-correlation of the sample spectrum and the blank spectrum, wherein
- the cross-correlation of the sample spectrum and the blank spectrum is determined based on a region of the sample spectrum and a corresponding region of the blank spectrum where only the structured background radiation is present;
- generating a mapped blank spectrum by mapping the blank spectrum to the sample spectrum based on the cross-correlation;
- subtracting the mapped blank spectrum from the sample spectrum to generate a background corrected sample spectrum;
- and
- displaying the background corrected sample spectrum.
Dependencies are inferred from the claim text.