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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 9 — Sep. 26, 2007

Backscattering measurements from individual Scots pine needles

Sanna Kaasalainen and Miina Rautiainen  »View Author Affiliations


Applied Optics, Vol. 46, Issue 22, pp. 4916-4922 (2007)
http://dx.doi.org/10.1364/AO.46.004916


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Abstract

We present ground reference measurements of the directional scattering properties of conifer needles. As the development of multiangular remote sensing instruments sets a growing need for reliable ground reference measurement techniques and databases, there is an increasing demand for data on the spectral properties of conifer needles in forest reflectance modeling and the inversion of physically based models. These data are scarce due to technical and conceptual problems related to measuring thin needles, and the needle directional spectral properties are currently nonexistent even for single wavelengths. We present results from measuring the monochromatic backscattering of Scots pine needles in a controlled laboratory environment; we feel these results of the hot spot signatures of individual conifer needles are unique. The experiment was conducted at 1064 nm with an instrument constructed specifically for backscatter measurement, based on techniques commonly used for laser backscattering measurements and CCD photometry. Strong backscattering peaks near 0° were observed for the needles, the amplitude of the brightening being up to approximately 40%.

© 2007 Optical Society of America

OCIS Codes
(140.3460) Lasers and laser optics : Lasers
(290.1350) Scattering : Backscattering

ToC Category:
Scattering

History
Original Manuscript: January 9, 2007
Revised Manuscript: May 2, 2007
Manuscript Accepted: May 3, 2007
Published: July 3, 2007

Virtual Issues
Vol. 2, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Sanna Kaasalainen and Miina Rautiainen, "Backscattering measurements from individual Scots pine needles," Appl. Opt. 46, 4916-4922 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-46-22-4916

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