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Proceedings Paper

Circular polarization effects in the light scattering from single and suspensions of dinoflagellates
Author(s): Daniel B. Shapiro; Arlon J. Hunt; Mary S. Quinby-Hunt; Patricia G. Hull
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Paper Abstract

Light scattering measurements were performed on single, immobilized dinoflagellates as well as on suspensions of the species Prorocentrum micans. The normalized Mueller scattering matrix element S14, which indicates an ability to depolarize circularly polarized light, is reported for both cases. The measurements involving single cells were performed on Prorocentrum micans, Gonyaulax polyhedra, and Crypthecodinium cohnii. The results show that the previously reported large S14 signal is not peculiar to P. micans. Time-dependent measurements of live cultures of P. micans show a large, high-frequency S14 signal. This signal is a diurnal function of the time of day, with a maximum at midnight. Investigations of the relationship between single cell and suspension measurements reveal that the large angle- dependent S14 peaks from immobilized single dinoflagellates are responsible for a large time-dependent S14 signal at 90 degree(s) in suspension measurements. The results of these experiments provide further evidence for the hypothesis that the chromosomes of the dinoflagellates are responsible for the large observed S14 signals. The unusual depolarization properties of dinoflagellates should be considered when using polarized light to enhance image contrast in underwater imaging.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1537, Underwater Imaging, Photography, and Visibility, (1 December 1991); doi: 10.1117/12.49258
Show Author Affiliations
Daniel B. Shapiro, Lawrence Berkeley Lab. (United States)
Arlon J. Hunt, Lawrence Berkeley Lab. (United States)
Mary S. Quinby-Hunt, Lawrence Berkeley Lab. (United States)
Patricia G. Hull, Tennessee State Univ. (United States)


Published in SPIE Proceedings Vol. 1537:
Underwater Imaging, Photography, and Visibility
Richard W. Spinrad, Editor(s)

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