Sensor Concept for Controlled Laser Cleaning via Photodiode

Lentjes, M.; Klomp, Dennis W. J.; Dickmann, K.

doi:10.1007/3-540-27176-7_54

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These properties make this system unsuitable for high resolved elemental identification but it is applicable for the detection of spectral fingerprints. It has turned out from former investigations concerning controlled laser cleaning of artworks that elemental identification is not urgent necessary [22,23]. Each layer has its individual spectral fingerprint and therewith it is distinguishable from other layers in a multi layer arrangement.…”

Section: Introductionmentioning

confidence: 99%

Controlled laser cleaning of artworks with low resolution libs and linear correlation analysis

Lentjes¹,

Dickmann²,

Meijer³

2005

International Congress on Applications of Lasers &Amp; Electro-Optics

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Controlled laser cleaning of artworks with low resolution libs and linear correlation analysis

Lentjes¹,

Dickmann²,

Meijer³

2005

International Congress on Applications of Lasers &Amp; Electro-Optics

View full text Add to dashboard Cite

show abstract

“…These properties make this system unsuitable for high resolution elemental identification but it is applicable for the detection of spectral fingerprints. It has turned out from former investigations concerning controlled laser cleaning of artworks that elemental identification is not urgent necessary [7]. Each layer has its individual spectral fingerprint and therewith it is distinguishable from other layers in a multi-layer arrangement.…”

Section: Introductionmentioning

confidence: 99%

Low Resolution LIBS for Online-Monitoring During Laser Cleaning Based on Correlation with Reference Spectra

Lentjes¹,

Dickmann²,

Meijer³

Lasers in the Conservation of Artworks

Self Cite

View full text Add to dashboard Cite

Summary. Based on a commercial miniature spectrometer, we have built a LIBSsystem for online monitoring and controlling during laser cleaning of artworks. In contrast to common LIBS set-ups with ICCDs, our system offers less sensitivity and λ-resolution. This system is unsuitable for high resolution elemental identification but it 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 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 monitoring of the cleaning process is enabled by permanent estimation of r. In case of closed-loop laser cleaning the ablation will continue until r exceeds a predefined value and subsequently the ablation process is automatically stopped.

show abstract

Sensor Concept for Controlled Laser Cleaning via Photodiode

Cited by 2 publications

References 6 publications

Controlled laser cleaning of artworks with low resolution libs and linear correlation analysis

Controlled laser cleaning of artworks with low resolution libs and linear correlation analysis

Low Resolution LIBS for Online-Monitoring During Laser Cleaning Based on Correlation with Reference Spectra

Contact Info

Product

Resources

About