Stray light correction algorithm for multichannel hyperspectral spectrographs

Area of Science:

• Spectroscopy
• Optical Engineering
• Data Calibration

Background:

• Multichannel spectrographs are susceptible to stray light, which degrades spectral data quality.
• Accurate spectral measurements are crucial in various scientific disciplines.

Purpose of the Study:

• To present and validate a novel algorithm for correcting stray light in multichannel fiber-coupled spectrographs.
• To demonstrate the first application of such a correction algorithm to a multichannel hyperspectral spectrograph.

Main Methods:

• Characterization measurements using a tunable laser system were performed.
• The algorithm's efficacy was evaluated using validation measurements with sources of varying spectral distributions.

Main Results:

• The developed algorithm effectively corrects for stray light in the spectrograph.
• Validation measurements confirmed the algorithm's performance across different spectral distributions.

Conclusions:

• The presented algorithm successfully mitigates stray light in multichannel hyperspectral spectrographs.
• This technique enhances spectral data integrity and can be adapted for imaging systems to correct point-spread response.