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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

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Stray light correction for diode-array-based spectrometers using a monochromator.

Saber G R Salim¹, Nigel P Fox, William S Hartree

¹National Institute of Standards (NIS), Tersa Street, El-Haram, P.O. Box 136, Giza 12211, Egypt. saber.salim@nis.sci.eg

|September 28, 2011

Summary

This study presents an efficient, low-cost stray light correction method for photodiode-array spectrometers. The approach uses a monochromator source, offering a reliable correction matrix for improved spectral data quality.

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Area of Science:

Spectroscopy
Optical Instrumentation
Analytical Chemistry

Background:

Photodiode-array spectrometers are widely used but susceptible to stray light contamination.
Stray light significantly impacts the accuracy of spectral measurements.

Purpose of the Study:

To develop an efficient and low-cost stray light correction method for photodiode-array spectrometers.
To evaluate the performance of a monochromator-based stray light correction system.
To compare the effectiveness of monochromator versus laser sources for stray light correction.

Main Methods:

A stray light correction approach utilizing a monochromator-based light source was implemented.
The generated stray light correction matrix was analyzed for reliability and robustness.
Limitations of using a monochromator compared to a laser source were investigated.

Main Results:

An efficient and low-cost stray light correction method was successfully demonstrated.
The reliability and robustness of the generated stray light correction matrix were confirmed.
The impact of using a monochromator source on correction quality was analyzed.

Conclusions:

The developed monochromator-based system provides an effective stray light correction for photodiode-array spectrometers.
This method offers a practical and cost-efficient solution for improving spectral data accuracy.
Understanding the limitations of the source is crucial for optimal stray light correction.