Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Remote nocturnal bird classification by spectroscopy in extended wavelength ranges

Not Accessible

Your library or personal account may give you access

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 36μm. 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

Full Article  |  PDF Article
More Like This
Feasibility study: fluorescence lidar for remote bird classification

Mikkel Brydegaard, Patrik Lundin, Zuguang Guan, Anna Runemark, Susanne Åkesson, and Sune Svanberg
Appl. Opt. 49(24) 4531-4544 (2010)

Refractive index and dispersion of butterfly chitin and bird keratin measured by polarizing interference microscopy

Hein L. Leertouwer, Bodo D. Wilts, and Doekele G. Stavenga
Opt. Express 19(24) 24061-24066 (2011)

Theoretical approaches to study the optical response of the red-legged honeycreeper’s plumage (Cyanerpes cyaneus)

Gonzalo M. Urquia, Marina E. Inchaussandague, Diana C. Skigin, Marcelo Lester, Ana Barreira, and Pablo Tubaro
Appl. Opt. 59(13) 3901-3909 (2020)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved