Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/34802
Title: A portable dynamic laser speckle system for sensing long-term changes caused by treatments in painting conservation
Keywords: Dynamic speckle
Activity
Temporal history speckle pattern
Varnish
Cyclododecane
Issue Date: 2018
Publisher: MDPI
Citation: PÉREZ, A. J. et al. A portable dynamic laser speckle system for sensing long-term changes caused by treatments in painting conservation. Sensors, [S.l.], v. 18, n. 1, 2018.
Abstract: Dynamic laser speckle (DLS) is used as a reliable sensor of activity for all types of materials. Traditional applications are based on high-rate captures (usually greater than 10 frames-per-second, fps). Even for drying processes in conservation treatments, where there is a high level of activity in the first moments after the application and slower activity after some minutes or hours, the process is based on the acquisition of images at a time rate that is the same in moments of high and low activity. In this work, we present an alternative approach to track the drying process of protective layers and other painting conservation processes that take a long time to reduce their levels of activity. We illuminate, using three different wavelength lasers, a temporary protector (cyclododecane) and a varnish, and monitor them using a low fps rate during long-term drying. The results are compared to the traditional method. This work also presents a monitoring method that uses portable equipment. The results present the feasibility of using the portable device and show the improved sensitivity of the dynamic laser speckle when sensing the long-term process for drying cyclododecane and varnish in conservation.
URI: https://www.mdpi.com/1424-8220/18/1/190
http://repositorio.ufla.br/jspui/handle/1/34802
Appears in Collections:DAT - Artigos publicados em periódicos

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