Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Dynamic Laser Speckle Technique Sensing Long-Term Changes Caused by Painting Treatments in Restauration of Paintings

Alberto J. Pérez
,
Rolando J. González-Peña
* ORCID logo ,
Roberto Braga Jr
,
Ángel Perles
ORCID logo ,
Eva Pérez–Marín
,
Fernando J. García-Diego
ORCID logo
Version 1 : Received: 15 November 2017 / Approved: 16 November 2017 / Online: 16 November 2017 (07:14:44 CET)

A peer-reviewed article of this Preprint also exists.

Pérez, A.J.; González-Peña, R.J.; Braga Jr., R.; Perles, Á.; Pérez–Marín, E.; García-Diego, F.J. A Portable Dynamic Laser Speckle System for Sensing Long-Term Changes Caused by Treatments in Painting Conservation. Sensors 2018, 18, 190. Pérez, A.J.; González-Peña, R.J.; Braga Jr., R.; Perles, Á.; Pérez–Marín, E.; García-Diego, F.J. A Portable Dynamic Laser Speckle System for Sensing Long-Term Changes Caused by Treatments in Painting Conservation. Sensors 2018, 18, 190.

Abstract

Dynamic laser speckle is applied as a reliable sensor of activity in all sort of material. Traditional applications are based on a time rate that is usually higher than 10 frames-per-second (FPS). Even in drying processes, where there is a high activity in the first moments after the painting and a slow activity after some minutes or hours, the process is based on the acquisition of images in a time rate that is the same in both moments of high and low activity. In this work, we present an alternative approach to follow the drying of paint and the other processes related to restauration of paintings that takes long-term to reduce the activity. We illuminated, using three different wavelength lasers, an accelerator (Cyclododecane) and a varnish used in restauration of paintings and monitor them at long-term drying using an alternative fps, comparing the results to the traditional method. The work also presents a way to do the monitoring using a portable equipment. The results present the feasibility to use the portable device and show the improvement in the sensitivity of the dynamic laser speckle to sense long-term process regarding the drying of Cyclododecane and Varnish used in restauration.

Keywords

dynamic speckle; activity; temporal history speckle pattern; Varnish; Cyclododecane

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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