Remote nocturnal bird classification by spectroscopy in extended wavelength ranges
(2011) In Applied Optics 50(20). p.3396-3411- Abstract
- 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 beta-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 mu m. We show that transmittance in this region depends on the angle of incidence of the transmitted light in a... (More)
- 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 beta-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 mu m. 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. (C) 2011 Optical Society of America (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2162234
- author
- Lundin, Patrik LU ; Samuelsson, Per ; Svanberg, Sune LU ; Runemark, Anna LU ; Åkesson, Susanne LU and Brydegaard, Mikkel LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Optics
- volume
- 50
- issue
- 20
- pages
- 3396 - 3411
- publisher
- Optical Society of America
- external identifiers
-
- wos:000293069000003
- scopus:79960260217
- ISSN
- 2155-3165
- DOI
- 10.1364/AO.50.003396
- language
- English
- LU publication?
- yes
- id
- 61a49efc-839c-41a1-88ca-f6319c0f85f2 (old id 2162234)
- date added to LUP
- 2016-04-01 11:11:43
- date last changed
- 2022-03-27 23:02:20
@article{61a49efc-839c-41a1-88ca-f6319c0f85f2,
abstract = {{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 beta-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 mu m. 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. (C) 2011 Optical Society of America}},
author = {{Lundin, Patrik and Samuelsson, Per and Svanberg, Sune and Runemark, Anna and Åkesson, Susanne and Brydegaard, Mikkel}},
issn = {{2155-3165}},
language = {{eng}},
number = {{20}},
pages = {{3396--3411}},
publisher = {{Optical Society of America}},
series = {{Applied Optics}},
title = {{Remote nocturnal bird classification by spectroscopy in extended wavelength ranges}},
url = {{https://lup.lub.lu.se/search/files/2458207/2426295.pdf}},
doi = {{10.1364/AO.50.003396}},
volume = {{50}},
year = {{2011}},
}