Controlled laser cleaning of artworks via low resolution LIBS and linear correlation analysis

M. Lentjes, Klaus Dickmann, J. Meijer

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

    6 Citations (Scopus)
    67 Downloads (Pure)

    Abstract

    Based on a fibre optic miniature spectrometer (spectral range 200-1100 nm, λ-resolution 2 nm) we have built up a LIBS-system (Laser Induced Breakdown Spectroscopy) for online monitoring during laser cleaning of artworks. This system is unsuitable for high resolved elemental identification but is applicable for the detection of “spectral fingerprints”. A powerful method of comparison online spectra during laser cleaning process with reference spectra is the analysis of correlation. Based on “Pearson’s correlation” the linear relationship between the entire data sets of both spectra are classified by the correlation coefficient r. In practise of laser cleaning a permanent comparison of the spectrum from the ablated layer with a reference spectrum of the layer to be preserved is necessary. Thus, online controlling of the cleaning process is enabled by permanent estimation of r. Laser removal will continue until r exceeds a predefined value subsequently the ablation process is paused. In a next step, the sample is translated and the cleaning process continues. Successfully we have automatically cleaned glass covered with encrustation and polluted parchment.
    Original languageUndefined
    Title of host publicationProceedings 24th International Congress on Applications of Lasers & Electro-Optics 2005 (ICALEO '05), 31 Oct ¿ 3 Nov 2005, Miami, USA
    EditorsA. Ostendof, A. Hoult, Y. Lu
    Place of PublicationMiami, USA
    PublisherLIA
    PagesM286-M292
    ISBN (Print)0-912035-82-X
    Publication statusPublished - 31 Oct 2005
    Event24th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2005 - Miami, United States
    Duration: 31 Oct 20053 Nov 2005
    Conference number: 24

    Publication series

    Name
    PublisherLIA

    Conference

    Conference24th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2005
    Abbreviated titleICALEO
    CountryUnited States
    CityMiami
    Period31/10/053/11/05

    Keywords

    • METIS-227169
    • IR-53870

    Cite this

    Lentjes, M., Dickmann, K., & Meijer, J. (2005). Controlled laser cleaning of artworks via low resolution LIBS and linear correlation analysis. In A. Ostendof, A. Hoult, & Y. Lu (Eds.), Proceedings 24th International Congress on Applications of Lasers & Electro-Optics 2005 (ICALEO '05), 31 Oct ¿ 3 Nov 2005, Miami, USA (pp. M286-M292). Miami, USA: LIA.