Fluorescence Lidar Multispectral Imaging for Diagnosis of Historical Monuments, Ö–vedskloster: A Swedish Case Study

Abstract

A fluorescence lidar measurement has been performed on Övedskloster Castle in Sweden. A mobile system from Lund University was placed at ~40 m distance from the sandstone facade. The lidar system, which uses a frequency-tripled Nd:YAG laser with a 355 nm pulsed beam, induces fluorescence in each target point. Areas were studied by using whisk broom scans. The possibility of detecting biodeteriogens on the surface and characterization of materials was confirmed. The method can be a tool for conservation planning and status control of the architectural heritage where fluorescence light can point out features that are not normally visible under natural illumination.