The influence and use of the SFR or LQS Nd:YAG laser beam on the cleaning and restoration of two diverse church facades

Ida Marie Catalano; S. E. Andriani; R. Laviano; F. Vona; Giuseppe Daurelio; G. Stea

doi:10.1117/12.611321

23 March 2005 The influence and use of the SFR or LQS Nd:YAG laser beam on the cleaning and restoration of two diverse church facades

Ida Marie Catalano, S. E. Andriani, R. Laviano, F. Vona, Giuseppe Daurelio, G. Stea

Author Affiliations +

Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005) https://doi.org/10.1117/12.611321
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic

Abstract

The present experimental study and job, still in progress, were conceived not only for an evaluation of the effectiveness of laser cleaning technique but also for comparing two different laser pulse duration of a Nd:YAG laser: Short Free Running (SFR) with a pulse duration of t_d=20μs and Long Q-Switched (LQS) with a pulse duration of t_d=70ns. The samples were carried out by the facades of teh Cathedral of Troia and of the Church of Molfetta, both in the South of Italy. All laser cleaning experiments were carried out in "wet condition" by using some distilled water on the encrustation before the irradiation. Surface analytical techniques, such as Optical Microscopy (OM), X-Ray Diffraction (XRD), Fourier-Transform InfraRed spectroscopy (FTIR), and Scanning Electron Microscopy (SEM) coupled with Energy Xpray Dispersive analysis (EDX)were used to detect crust chemical composition and morphology, as well as, to monitor the effects induced by the laser treatments. On the basis of these structural and analytical examinations, both the lasers have shown to be appropriate for achieving a sufficient removal of the selected layers without modifying the surface morphology and keeping the preservation of the "patina/treatment" layer.

Citation Download Citation

Ida Marie Catalano, S. E. Andriani, R. Laviano, F. Vona, Giuseppe Daurelio, and G. Stea "The influence and use of the SFR or LQS Nd:YAG laser beam on the cleaning and restoration of two diverse church facades", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); https://doi.org/10.1117/12.611321

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Nd:YAG lasers

Scanning electron microscopy

Pulsed laser operation

Chemical analysis

FT-IR spectroscopy

Laser systems engineering

Q switched lasers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years