Fluorescence lidar imaging of historical monuments

Weibring, Petter; Johansson, Thomas; Edner, Hans; Svanberg, Sune; Sundnér, Barbro; Raimondi, Valentina; Cecchi, Giovanna; Pantani, L.

doi:10.1364/ao.40.006111

Cited by 78 publications

(29 citation statements)

References 16 publications

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“…1 The differential absorption lidar ͑DIAL͒ technique is a unique tool for three-dimensional mapping and total flux measurements of gaseous air pollutants, [1][2][3][4] and the fluorescence lidar technique is a powerful means for the monitoring of the surface of the sea, 5,6 of terrestrial vegetation, 7 and of the weathered facades of historical buildings and monuments. 8,9 Whereas the distributed scattering along the laser beam is analyzed at selected wavelengths in atmospheric lidar research, the spectral contents in the fluorescence echo from topographic targets are utilized in the fluorescence lidar approach. The equations describing the phenomena have been discussed, e.g., in Ref.…”

Section: Introductionmentioning

confidence: 99%

Versatile mobile lidar system for environmental monitoring

2003

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Section: Introductionmentioning

confidence: 99%

Versatile mobile lidar system for environmental monitoring

2003

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“…One alternative to staining and manual evaluation is multispectral imaging 27,54 together with multivariate analysis. [57][58][59][60] Fig. 9 shows the results of analyzing a malaria infected blood smear in the instrument.…”

Section: Malaria Analysis In Parasitological Studiesmentioning

confidence: 99%

Versatile multispectral microscope based on light emitting diodes

Brydegaard

Merdasa

Jayaweera

et al. 2011

Review of Scientific Instruments

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Versatile multispectral microscope based on light emitting diodes.Brydegaard, Mikkel; Merdasa, Aboma; Jayaweera, Hiran; Ålebring, Jens; Svanberg, Sune General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. We describe the development of a novel multispectral microscope, based on light-emitting diodes, capable of acquiring megapixel images in thirteen spectral bands from the ultraviolet to the near infrared. The system captures images and spectra in transmittance, reflectance, and scattering modes. We present as examples of applications ground truth measurements for remote sensing and parasitology diagnostics. The system is a general purpose scientific instrument that could be used to develop dedicated simplified instruments with optimal bands and mode selection.

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“…Examples of standard applications are the mapping of aerosols [33], clouds [34], temperature [35], and wind speed [36] in the atmosphere. Lidar is also used for gas concentration measurements [37][38][39] and fluorescence studies of, e.g., aerosols [40] and hard targets such as buildings, water compounds, and plants [41,42]. The technique is well documented, and overviews can be found in e.g., [43,44].…”

Section: B Lidarmentioning

confidence: 99%

Remote nocturnal bird classification by spectroscopy in extended wavelength ranges

et al. 2011

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Remote nocturnal bird classification by spectroscopy in extended wavelength rangesLundin, Patrik; Samuelsson, Per; Svanberg, Sune; Runemark, Anna; Åkesson, Susanne; Brydegaard, Mikkel General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. We present optical methods at a wide range of wavelengths for remote classification of birds. The proposed methods include eye-safe fluorescence and depolarization lidar techniques, passive scattering spectroscopy, and infrared (IR) spectroscopy. In this paper we refine our previously presented method of remotely classifying birds with the help of laser-induced β-keratin fluorescence. Phenomena of excitation quenching are studied in the laboratory and are theoretically discussed in detail. It is shown how the ordered microstructures in bird feathers induce structural "colors" in the IR region with wavelengths of around 3-6 μm. We show that transmittance in this region depends on the angle of incidence of the transmitted light in a species-specific way and that the transmittance exhibits a close correlation to the spatial periodicity in the arrangement of the feather barbules. We present a method by which the microstructure of feathers can be monitored in a remote fashion by utilization of thermal radiation and the wing beating of the bird.

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Fluorescence lidar imaging of historical monuments

Cited by 78 publications

References 16 publications

Versatile mobile lidar system for environmental monitoring

Versatile mobile lidar system for environmental monitoring

Versatile multispectral microscope based on light emitting diodes

Remote nocturnal bird classification by spectroscopy in extended wavelength ranges

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