Cleaning graffitis on urban buildings by use of second and third harmonic wavelength of a Nd:YAG laser:: a comparative study

被引:53
作者
Costela, A
García-Moreno, I
Gómez, C
Caballero, O
Sastre, R
机构
[1] CSIC, Inst Quim Fis Rocasolano, Madrid 280006, Spain
[2] CSIC, Inst Ciencia & Tecnol Polimeros, Madrid, Spain
关键词
laser cleaning; Nd : YAG; laser-induced breakdown spectroscopy; graffitis;
D O I
10.1016/S0169-4332(02)01241-2
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The present article focuses on the cleaning of graffitis on urban buildings by using laser radiation. A comparison between cleaning results obtained with second and third harmonic wavelengths of a Q-switched Nd:YAG laser is presented. Ablation rate studies have been carried out and elemental analysis by laser-induced breakdown spectroscopy (LIBS) has been applied as a real-time diagnostic technique for the cleaning process, with the aim of preventing potential damage of the surface. To remove graffitis on urban buildings the third harmonic was observed to be the most efficient wavelength, supporting the best result. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:86 / 99
页数:14
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