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Proceedings Paper

Technique for sub-pixel calibration of compact spectrometers (Conference Presentation)

Paper Abstract

Vendor-supplied calibration curves for fixed-grating, fixed-detector-array portable spectrometers typically provide wavelength accuracies of about ±1 pixel on the array. Independent calibration using atomic lamp spectra is hampered by the sparsity of available lines: interpolation between atomic lines typically leads, again, to pixel-width errors or greater. We provide a technique that combines information from sparse atomic line spectra with densely populated peaks from the transmission spectrum of an air-spaced etalon to generate calibration curves capable of ~1/10th pixel accuracies across entire detector arrays. Subsequent transmission spectra through solid etalons of well-characterized glass samples validate the calibration procedure.

Paper Details

Date Published: 14 May 2019
Proc. SPIE 11007, Advanced Environmental, Chemical, and Biological Sensing Technologies XV, 110070H (14 May 2019); doi: 10.1117/12.2518550
Show Author Affiliations
Guy Beadie, U.S. Naval Research Lab. (United States)
Michael Brindza, Naval Air Station Patuxent River (United States)
Richard Flynn, Peak Nano Optics (United States)
Armand Rosenberg, U.S. Naval Research Lab. (United States)
James S. Shirk, Sotera Defense Solutions, Inc. (United States)

Published in SPIE Proceedings Vol. 11007:
Advanced Environmental, Chemical, and Biological Sensing Technologies XV
Tuan Vo-Dinh, Editor(s)

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