NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Polarization photometer to measure bidirectional reflectance factor R(55 deg, 0 deg, 55 deg, 180 deg) of leavesA polarization photometer has been developed for rapidly determining the bidirectional, polarized, and diffuse light-scattering properties of individual leavs illuminated and measured 'in vivo' at an angle of 55 deg (approximately Brewster's angle) in six wavelength bands in the visible and near-IR wavelength regions. The optical performance and data quality of the system are evaluated to estimate the magnitude of the variation in the data attributable to the instrument system and to measurement procedures. The potential to discriminate between three species of oak is demonstrated using data acquired by the polarization photometer. The instrument is being used to increase understanding of the radiation transfer process in plant canopies and specifically to determine how agronomic information of the physical and chemical processes in leaves, plants, and plant canopies is expressed in these light-scattering properties.
Document ID
19860051010
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Vanderbilt, V. C.
(NASA Ames Research Center Moffett Field, CA; Purdue University, West Lafayette, IN, United States)
Grant, L.
(Purdue University West Lafayette, IN, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1986
Publication Information
Publication: Optical Engineering
Volume: 25
ISSN: 0091-3286
Subject Category
Instrumentation And Photography
Accession Number
86A35748
Funding Number(s)
CONTRACT_GRANT: NAS9-16528
CONTRACT_GRANT: NAG5-269
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available