Photodiode array spectrometer calibration
AssigneeWaters Technologies Corporation
InventorsSean Eric Anderson, Sebastien Besner, James E, Usowicz, Neal Pugh
Life of this patent
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Abstract
Methods of photodiode array spectrometer calibration include acquiring a first spectrum using a first spectral source of a spectrometer; finding spectral data points at pixel locations from the first spectrum; replacing the first spectral source with a second spectral source in the spectrometer; finding spectral data points at pixel locations using the second spectral source; selecting one or more of the spectral data points; generating a calibration curve by fitting the selected spectral data points to one or more functions of the calibration curve; and using the selected spectral data points and the calibration curve to calibrate the spectrometer.
Claims24
A method of photodiode array spectrometer calibration comprising:
- acquiring a first spectrum using a first spectral source of a spectrometer;
- finding spectral data points at pixel locations from the first spectrum;
- replacing the first spectral source with a second spectral source in the spectrometer;
- finding spectral data points at pixel locations using the second spectral source;
- selecting one or more of the spectral data points;
- generating a calibration curve by fitting the selected spectral data points to one or more functions of the calibration curve;
- and
- using the selected spectral data points and the calibration curve to calibrate the spectrometer.
A method of photodiode array spectrometer calibration comprising:
- acquiring one or more spectrums using one or more spectral sources;
- generating a calibration curve for a spectrometer expressing wavelength over a pixel range of spectral data points for the one or more acquired spectrums;
- describing the calibration curve as a piecewise function using at least a first function over a first portion of the pixel range and a second function over a second portion of the pixel range;
- and
- using the calibration curve for calibration of a spectrometer.
A method of photodiode array spectrometer calibration comprising:
- acquiring one or more spectrums using one or more spectral sources;
- generating a calibration curve for a spectrometer by fitting a range of spectral data points to one or more functions of the calibration curve;
- generating a dispersion curve for the spectrometer;
- calculating an error in the generated calibration curve relative to the dispersion curve;
- and
- storing the calculated error into a calibration data storage system of the spectrometer.
A method of photodiode array spectrometer calibration comprising:
- acquiring a first spectrum from a first spectral source of a spectrometer using a first slit position;
- performing a first calibration of the spectrometer using the first spectrum;
- acquiring a second spectrum from the first spectral source using a second slit position;
- performing a second calibration of the spectrometer using the second spectrum.
Dependencies are inferred from the claim text.