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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 20 — Jul. 10, 2011
  • pp: 3396–3411

Remote nocturnal bird classification by spectroscopy in extended wavelength ranges

Patrik Lundin, Per Samuelsson, Sune Svanberg, Anna Runemark, Susanne Åkesson, and Mikkel Brydegaard  »View Author Affiliations


Applied Optics, Vol. 50, Issue 20, pp. 3396-3411 (2011)
http://dx.doi.org/10.1364/AO.50.003396


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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 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.

© 2011 Optical Society of America

OCIS Codes
(170.1420) Medical optics and biotechnology : Biology
(280.3640) Remote sensing and sensors : Lidar
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6340) Spectroscopy : Spectroscopy, infrared
(280.4991) Remote sensing and sensors : Passive remote sensing

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: January 4, 2011
Revised Manuscript: May 13, 2011
Manuscript Accepted: May 18, 2011
Published: July 1, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Patrik Lundin, Per Samuelsson, Sune Svanberg, Anna Runemark, Susanne Åkesson, and Mikkel Brydegaard, "Remote nocturnal bird classification by spectroscopy in extended wavelength ranges," Appl. Opt. 50, 3396-3411 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-20-3396

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