Applicability of Femtosecond Lasers in the Cross-section Sampling of Works of Art

作者：Spence Stephanie; Harada Takaaki; Margiolakis Athanasios; Deckoff Jones Skylar; Shugar Aaron N; Hamm James F; Dani Keshav M; Dani Anya R

来源：MRS Advances, 2017, 2(33-34): 1801-1804.

DOI：10.1557/adv.2017.242

<jats:title>ABSTRACT</jats:title>
<jats:p>Issues in traditional cross-section sampling of paintings and other cultural artifacts with a scalpel, such as crumbling, delamination and paint compression, can deter conservators from sampling fragile paint layers. Often, such sampling carries the risk of causing further damage from a scalpel, which outweighs the benefits of scientific investigation. Here, we show that femtosecond lasers offer a viable alternative to obtaining cross-sections with minimal damage to the surrounding artwork. A Regenerative Ti:Sapphire amplifier system with a pulse duration of 70 femtoseconds, a few milliwatts of average power and a repetition rate of 1 kHz (1000 pulses/sec) was used for the study. Tests were performed on oil paintings ranging in age from the 19<jats:sup>th</jats:sup> century to late 20<jats:sup>th</jats:sup> century. Effective settings were determined to be 2 mW of power at a speed of 10mm/sec using an 800nm laser. Preliminary results suggest femtosecond lasers could be a viable alternative for obtaining paint cross-sections when traditional sampling methods cause unnecessary damage to fragile materials.</jats:p>

• 出版日期2017