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The Fluorescence Lidar Multispectral Imaging project (2005-)

for the investigation of historical monuments

Methods for the investigation of historical buildings and their condition is an important component in future restoration and conservation measures. With the help of a mobile laser radar system and fluorescence this project aims at studying a culturally historical building and its present state. This method has been developed in order to provide other views of reality than those that are visible to the eye’s very limited wavelength. To allow other wavelengths to “see” and pictorially visualise these results provides images of changes in the surfaces and the materials. This laser system also provides the possibility of investigations even during difficult weather, poor visibility and long distances.
The research project, financed by the Fondazione Famiglia Rausing, is a co-operation between the disciplines of Architectural conservation and restoration (Bebyggelsevård) and Atom physics (Atomfysik) at the University of Lund, the CNR-IFAC Institute in Florence and the Swedish Institute in Rome. The goal in establishing this collaboration is to perform a field study of the Colosseum and the San Giovanni in Laterano baptistery in Rome, using the fluorescence lidar technique, during February 2005. The foremost goal of this study is to ascertain the relevance and usefulness of this technique as a non-damaging investigatory method for culturally historical buildings. The aim of these field studies in Rome is, on the basis of the scannings, together with existing material on the buildings as well as investigations on the spot, to be able to point to tendencies concerning the condition of the façade as well as earlier conservation interventions and to characterise the different materials in the façade as well as biological disturbances, such as algae and lichens, not yet visible to the human eye.

References:
-P. Weibring, T. Johansson, H. Edner, S. Svanberg, B. Sundnér, V. Raimondi, G. Cecchi, L. Pantani, ‘Fluorescence lidar imaging of historical monuments’, Appl. Opt. 40 (2001), 6111.
-D. Lognoli, G. Cecchi, I. Mochi, L. Pantani, V. Raimondi, R. Chiari, T. Johansson, P. Weibring, H. Edner, S. Svanberg, ‘Fluorescence lidar imaging of the cathedral and baptistery of Parma’, Applied physics B 76 (2003), 457-465.
-R. Grönlund, M. Bengtsson, M. Sjöholm, G. Somesfalean, T. Johansson, P. Weibring, H. Edner, S. Svanberg, J. Hällström, K. Barup, ‘Lidar remote-sensing assessment of the cultural heritage using laser-induced fluorescence and laser-induced break-down spectroscopy’, “Air pollution and cultural heritage”, Dec. 1-3, Seville, Spain.

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