激光清除石质文物表面污染物

发布时间：2018-01-16 05:28

本文关键词：激光清除石质文物表面污染物　出处：《中国激光》2013年09期 　论文类型：期刊论文

【摘要】：在文物保护领域中,石质文物表面的污染物影响文物美观,更威胁文物保存,因而急需开展文物清洗技术研究以解决这一问题。激光清洗技术与其他清洗方法(化学清洗和微粒子喷射等)相比,具有无损、去污能力强、精确和环保等特点。利用激光清洗技术清除石质文物表面污染物。实验研究了砂岩在激光辐照下的损伤,并结合理论计算,得到砂岩在脉冲激光(波长为1064nm)辐照下,10次脉冲的激光诱导损伤阈值为73.5mJ,理论与实验值基本吻合。在激光清除砂岩表面墨迹污染物实验中,得到了激光清洗所需的最佳方式和参数。在此基础上,到四川绵阳碧水寺进行现场实验,结果表明激光能安全有效去除烟熏污染物。
[Abstract]:In the field of cultural relic protection, contaminants on the surface of stone cultural relics affect the beauty of cultural relics and threaten the preservation of cultural relics. Therefore, there is an urgent need to carry out cultural relics cleaning technology to solve this problem. Compared with other cleaning methods (chemical cleaning and micro-particle injection), laser cleaning technology has a strong decontamination ability. The laser cleaning technology is used to remove the surface contamination of stone relics. The damage of sandstone under laser irradiation is studied experimentally, and the theoretical calculation is combined. A laser induced damage threshold of 73.5 MJ was obtained for 10 pulses of sandstone irradiated by pulsed laser (wavelength 1064 nm). In the experiment of removing ink stain on sandstone surface by laser, the best method and parameters for laser cleaning were obtained. On this basis, the field experiment was carried out at Bishui Temple, Mianyang, Sichuan Province. The results show that laser can remove fumigated pollutants safely and effectively.
【作者单位】：中国工程物理研究院激光聚变研究中心;中国地质大学(武汉)工程学院;砖石质文物保护国家文物局重点科研基地;
【基金】：国家科技支撑计划(2009BAJ53B05-3) “十一五”科技支撑项目
【分类号】：K876.2;TN249
【正文快照】： 1引言在我国长达五千年的历史中,存留下来诸多的历史和文化遗存。其中石质文物无论从其制式、体量,还是其富含的历史、艺术内容及其价值均可以说是中华民族文化的精华所在。但石质文物由于其体量限制及不可移动性,多处于露天或半露天保存,由于自然、环境、人为、历史等原因的

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