Holographic monitoring of transportation effects on canvas paintings

Digital holographic speckle pattern interferometry is used to locate areas at risk of deterioration in paintings due to vibration

Studying transportation effects on canvas paintings by full field digital holographic techniques

Digital holographic speckle pattern interferometry (DHSPI) is a tool that retrieves the mechanical reaction of a work of art after a shock or vibration, perhaps as a result of mishandling. It provides a method for the assessment of the impact of transportation and reliable risk analysis. In order to assess the effect of handling and transportation on canvas paintings, an investigation was conducted at Bern University of Applied Sciences, University of the Arts, Conservation and Restoration employing DHSPI. Samples of canvas were used for a series of measurements simulating transportation vibrations. The surface deformation topology of the samples was studied with DHSPI in order to acquire information about all the alterations caused on the canvas samples by the vibration ‘fatigue’ (i.e. the repeated deformation due to vibration). Crack maps, provided by analysis of the DHSPI measurements, illustrate the crack growth with time. Risk areas, located before any vibration loading, also proved to be those most likely to develop cracks. The tests of the transportation of canvas paintings have been successful in detecting cracks and areas with defects, and also in monitoring their propagation with high precision

Fully-Non-Contact Masking-Based Holography Inspection on Dimensionally Responsive Artwork Materials

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Defect growth in model panel paintings by full field interferometry

MULTIENCOD

Multifunctional encoding system for assessment of movable cultural heritage

This is an introductory paper of a recent EC project dealing with research in cultural heritage and aiming to communicate new fields of application for optical metrology techniques. The project is in its initial state and more conclusive information is expected to be available at the time of the perspective conference. Nowadays safety, ethical, economical and security issues as well as the increase demand for loaning of art objects for exhibitions in transit, are forcing the Conservation Community to undertake strong initiatives and actions against various types of mistreatment, damage or fraud, during transportation of movable Cultural Heritage. Therefore the interest directs to the development of innovative methodologies and instrumentation to respond to critical aspects of increased importance in cultural heritage preservation, among which of prior consideration are: to secure proper treatment, assess probable damage, fight fraud actions in transportation

Surface monitoring measurements of materials on environmental change conditions

Climate Change is one of the most critical global challenges of our time and the burdened cultural heritage of Europe is particularly vulnerable to be left unprotected. Climate for Culture2 project exploits the damage impact of climate change on cultural heritage at regional scale. In this paper the progress of the study with in situ measurements and investigations at cultural heritage sites throughout Europe combined with laboratory simulations is described. Cultural works of art are susceptible to deterioration with environmental changes causing imperceptibly slow but steady accumulation of damaging effects directly impacted on structural integrity. Laser holographic interference method is employed to provide remote non destructive field-wise detection of the structural differences occurred as climate responses. The first results from climate simulation of South East Europe (Crete) are presented. A full study in regards to the four climate regions of Europe is foresee n to provide values for development of a precise and integrated model of thermographic building simulations for evaluation of impact of climate change. Development of a third generation user interface software optimised portable metrology system (DHSPI II) is designed to record in custom intervals the surface of materials witnessing reactions under simulated climatic conditions both on-field and in laboratory. The climate conditions refer to real data-loggers readings representing characteristic historical building in selected climate zones. New generation impact sensors termed Glass Sensors and Free Water Sensors are employed in the monitoring procedure to cross-correlate climate data with deformation data. In this paper results from the combined methodology are additionally presented

Coherent metrology in impact assessment of movable artwork: the MULTIENCODE project

MULTIENCOD