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White light spectral interferometry as a spectrometer calibration tool.

Raúl de la Fuente1

  • 1Universidade de Santiago de Compostela, Departamento de Física Aplicada, Facultade de Óptica e Optometría, 15782 Galicia, Spain.

Applied Spectroscopy
|July 12, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method for precise wavelength calibration of dispersive spectrometers using a white light interferometer and spectral lamps. This technique ensures accurate spectral calibration across the entire detector range.

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Area of Science:

  • Optical Engineering
  • Spectroscopy
  • Metrology

Background:

  • Accurate wavelength calibration is crucial for spectrometer performance.
  • Traditional calibration methods can be time-consuming and may not cover the entire spectral range.
  • Dispersive spectrometers require precise wavelength-pixel mapping for reliable data.

Purpose of the Study:

  • To develop and present a novel, robust method for complete spectral calibration of dispersive spectrometers.
  • To demonstrate the effectiveness of combining a white light interferometer with spectral lamps for wavelength calibration.
  • To investigate methods for optimizing the calibration procedure by minimizing spectral lines.

Main Methods:

  • Utilizing a white light interferometer in conjunction with spectral lamps.
  • Illuminating the spectrometer with spectral lamps to establish discrete wavelength-pixel relationships.
  • Employing the wavelength-dependent phase difference from the interferometer for continuous spectral calibration.

Main Results:

  • The proposed method enables complete spectral calibration at any point on the spectrometer detector.
  • Two practical examples demonstrate the robustness and reliability of the calibration technique.
  • Analysis of minimizing spectral lines for efficient calibration procedures was performed.

Conclusions:

  • The combined white light interferometer and spectral lamp approach offers a comprehensive solution for spectrometer wavelength calibration.
  • This method provides high accuracy and robustness, applicable across the spectrometer's full spectral range.
  • The findings contribute to improved accuracy and efficiency in spectroscopic measurements.