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- Barup, Kerstin
(author)
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Linköpings domkyrka
- 2007
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In: Sten. - 0346-1866. ; :1
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Journal article (pop. science, debate, etc.)
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4. |
- Grönlund, Rasmus, et al.
(author)
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Fluorescence lidar multispectral imaging for diagnosis of historical monuments - Övedskloster, a Swedish case study
- 2007
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In: Springer Proceedings in Physics. - 0930-8989. ; 116, s. 583-591
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Conference paper (peer-reviewed)abstract
- A fluorescence lidar measurement has been performed on the castle Övedskloster in Sweden. A mobile system from the Lund University was placed at ~40 m distance from the sandstone façade. 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.
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5. |
- Grönlund, Rasmus, et al.
(author)
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Laser-Induced Fluorescence for Assessment of Cultural Heritage
- 2006
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Conference paper (peer-reviewed)abstract
- Remote imaging measurements of laser-induced fluorescence have been performed, with application towards cultural heritage. Measurement campaigns have been performed at, e.g., the Coliseum in Rome. Differences in fluorescence spectra from different points were found and images corresponding to different features could be produced for thematic mapping.
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6. |
- Grönlund, Rasmus, et al.
(author)
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Laser-induced fluorescence imaging for studies of cultural heritage - art. no. 66180P
- 2007
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In: O3A: Optics for Arts, Architecture, and Archaeology. - : SPIE. - 1996-756X .- 0277-786X. - 9780819467607 ; 6618, s. 6180-6180
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Conference paper (peer-reviewed)abstract
- Laser-induced fluorescence for remote imaging of historical monuments is an established technique, which in this work has been used in measurement campaigns at the Coliseum and the Baptistery of San Giovanni in Laterano in Rome, Italy. The results presented here are examples that show that biodeteriogens can be monitored and that. materials can be identified. Also, cleaned and soiled areas on the stone can be localized and differences between soiling can be found, which may be useful in the sustainable conservation for mapping and evaluation.
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7. |
- Grönlund, Rasmus, et al.
(author)
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Remote laser-induced fluorescence imaging for assessment of cultural heritage
- 2005
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In: 2005 Conference on Lasers and Electro-Optics Europe. - 0780389743 ; , s. 685-685
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Conference paper (peer-reviewed)abstract
- In this paper, we propose to perform remote laser-induced fluorescence imaging for assessment of cultural heritage. The experiments are performed using the lidar system consist of frequency-tripled Nd:YAG laser at 355 nm with a spot size of ~4 cm diameter and the signal is collected using a coaxial 40-cm-diameter Newtonian telescope. The fluorescence light is focused into an optical fibre and guided a time-gated optical multichannel analyser system, where the fluorescence spectrum is recorded. Then the laser directed to the next point and thus a fluorescence image can be produced
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8. |
- Grönlund, Rasmus, et al.
(author)
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Remote Multicolor Excitation Laser-Induced Fluorescence Imaging
- 2006
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In: Laser Chemistry. - : Hindawi Limited. - 0278-6273 .- 1476-3516. ; 2006, s. 57934-57934
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Journal article (peer-reviewed)abstract
- Remote laser-induced fluorescence of stone materials was performed with application towards cultural heritage. Fluorescence was induced in targets ∼60 m from a mobile lidar laboratory by ultraviolet laser light, either from a frequency-tripled Nd:YAG laser or from an optical parametric oscillator system. Analysis was performed on combined spectra from the different excitation wavelengths and it was noted that important additional information can be gained when using several excitation wavelengths.
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9. |
- Hällström, Jenny, et al.
(author)
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Documentation of soiled and biodeteriorated facades: a case study on the Coliseum, Rome, using hyperspectral imaging fluorescence lidars
- 2009
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In: Journal of Cultural Heritage. - : Elsevier BV. - 1778-3674 .- 1296-2074. ; 10:1, s. 106-115
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Journal article (peer-reviewed)abstract
- Non-invasive documentation of historic façades with fluorescence lidar techniques can provide helpful information for the cultural heritage sector, especially when large areas outdoors are to be examined. This paper presents a case study on the Coliseum, Rome, where both cleaned and heavily soiled areas of the monument were scanned and analysed with two fluorescence lidar systems. Biodeterioration processes have also been addressed during the experiment with the aim of assessing the colonisation extent on selected areas of the monument. Results show the usefulness of a mobile fluorescence lidar system for documentation and survey of large surfaces with complex conditions without limiting the public access to the monument.
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10. |
- Hällström, Jenny, et al.
(author)
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Remote fluorescence lidar imaging of monuments: the Coliseum and the Lateran Baptistery in Rome
- 2008
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In: LASERS IN THE CONSERVATION OF ARTWORKS. - 9780415475969 ; , s. 169-175
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Conference paper (peer-reviewed)abstract
- On site remote laser-induced fluorescence measurements have been performed with application towards non-movable objects. This paper describes the application of non-invasive hyperspectral fluorescence imaging to two masonry monuments, the Coliseum and the Lateran Baptistery in Rome, during a joint Italian-Swedish experiment. The mobile systems of Lund Institute of Technology, Sweden, and CNR-IFAC, Italy, were placed at the distance of 18-65 m from the façades for the documentation and characterization of surfaces, including materials, protective treatments, biodeteriogens and historic layers.
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