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Procedures for Wavelength Calibration and Spectral Response Correction of CCD Array Spectrometers.

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Summary

This study presents a method to correct spectral artifacts introduced by splicing partial spectra from charge-coupled device (CCD) detectors. Spectral correction using a reference irradiance source ensures accurate extended-range spectral analysis.

Keywords:
CCD array spectrometerfluorescencespectral response correctionsplicing procedure

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Area of Science:

  • Spectroscopy
  • Analytical Chemistry
  • Optical Instrumentation

Background:

  • Spectrometers with charge-coupled device (CCD) array detectors require splicing partial spectra for extended wavelength ranges.
  • This splicing process can introduce instrument-dependent artifacts into the acquired spectra.
  • Accurate spectral data is crucial for various scientific analyses.

Purpose of the Study:

  • To develop and validate a procedure for acquiring extended-range spectra.
  • To correct artifacts introduced by spectral splicing in CCD-based spectrometers.
  • To ensure accurate wavelength and intensity assignments in spectral measurements.

Main Methods:

  • Acquiring multiple partial spectra at different grating angles.
  • Splicing partial spectra to create a single extended spectrum.
  • Acquiring a reference irradiance spectrum for spectral correction.
  • Using a krypton lamp for wavelength calibration.

Main Results:

  • Spectral artifacts from splicing were successfully removed using a reference irradiance source.
  • The effectiveness of spectral correction depends on matching the wavelength range of the reference spectrum to the analyte spectrum.
  • Wavelength calibration proved robust and insensitive to the splicing procedure across different wavelength ranges.

Conclusions:

  • A reliable method for spectral correction of spliced spectra from CCD detectors was established.
  • Accurate extended-range spectral acquisition is achievable by correcting splicing-induced artifacts.
  • The validated procedure enhances the reliability of spectral data for scientific applications.