title: Accurate wavelength calibration in the near-infrared for multielement analysis without the need for reference spectra.
abstract: A new technique has been developed for an instant, precise, and accurate wavelength calibration over a wide pixel array for simultaneous, multielement spectral analysis based on an inverse numerical solution to the grating dispersion function. This technique is applicable to multielement analytical applications such as laser-induced breakdown spectroscopy (LIBS), particularly when using high-density gratings in the upper visible and in the near-infrared, where nonmetallic elements are detected. This application overcomes the need to use reference spectra for each window of observation and is tested on a commercially available LIBS instrument.
authors.affiliation: Aristotle University of Thessaloniki, Thessaloniki 54124, Greece. gasim@auth.gr
authors.forename: George
authors.initials: G
authors.lastname: Asimellis
authors.forename: Aggelos
authors.initials: A
authors.lastname: Giannoudakos
authors.forename: Michael
authors.initials: M
authors.lastname: Kompitsas