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Proceedings Paper

Comparison and development of absorption peak determination algorithms for wavelength standards
Author(s): Changjiang Zhu; Leonard M. Hanssen
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Paper Abstract

Several peak determination algorithms are described and compared using the spectra of a NIST wavelenght/wavenumber standard reference material (SRM). These methods are the (1) centroid (or center of gravity) (with fraction value 0.5), (2) extrapolated centroid, (3) extrapolated bisecting, (4) polynomial curve fit, and (5) absolute maximum (minimum) methods. Comparisons are made of the peak wavelength value accuracy and reproducibility, versatility and other aspects of the peak determination methods. Optimization studies of the centroid, extrapolated centroid, and extrapolated bisecting peak determination methods, used for several NIST SRM's, have found that the peak value accuracy and precision can be improved by careful selection of peak fraction, spectral data density and polynomials fitting order (for extrapolated algorithms).

Paper Details

Date Published: 11 October 2000
PDF: 7 pages
Proc. SPIE 4103, Optical Diagnostic Methods for Inorganic Materials II, (11 October 2000); doi: 10.1117/12.403571
Show Author Affiliations
Changjiang Zhu, National Institute of Standards and Technology (United States)
Leonard M. Hanssen, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 4103:
Optical Diagnostic Methods for Inorganic Materials II
Leonard M. Hanssen, Editor(s)

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