4.3 Article

Historical stained-glass window laser preservation: The heat accumulation challenge

期刊

出版社

ELSEVIER
DOI: 10.1016/j.bsecv.2021.12.003

关键词

Conservation; Cultural heritage; Stained-glass; Heat accumulation; Ultra-short pulsed-laser

向作者/读者索取更多资源

Stained-glass windows are an important part of cultural heritage, and short pulse lasers offer new opportunities for safe decontamination. In this study, the interaction of sub-nanosecond and femtosecond pulsed lasers with stained-glass was analyzed for the first time, exploring their applicability in safely cleaning stained-glass windows. The results show that damage can be induced in these materials using energy levels below damage thresholds, and two alternative irradiation procedures are proposed to control the temperature increase and apply safe cleaning protocols.
Stained-glass windows form an important part of cultural heritage. Short pulse lasers open new opportunities for safe decontamination. In this work, and for the first time, the interaction of sub-nanosecond and femtosecond pulsed lasers with some contemporary stained-glasses has been analyzed exploring their applicability to safely clean stained-glass windows. The results show that, in these materials, damage can be induced using energy levels below damage thresholds due to the heat accumulation in the coating layer that is being eliminated. The latter generates significant thermal stresses on the glass volume, which induce crack formation. In consequence, in order to apply safe stained-glass cleaning protocols, laser parameters have to be selected to control the temperature increase within this layer. To achieve the latter goal, two alternative irradiation procedures were explored in this work. As a first option, a reduction of the effective pulse repetition frequency to values lower than 20 kHz was applied. A second alternative was used for lasers with pulse repetition rates in the hundreds of kHz. In this case, the burst mode was employed controlling the number of pulses emitted and combined with an adequate time lapse selection between two consecutive burst runs. A proof of concept demonstration was carried out on a stained-glass sample from the Cathedral of Cuenca, dated at the end of the XV century.(c) 2021 SECV. Published by Elsevier Espana, S.L.U. This is an open access article under theCC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据