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Proceedings Paper

Strong Backscattering And Cross Polarization From Bubbles And Glass Spheres In Water
Author(s): Philip L. Marston; Dean S. Langley
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Paper Abstract

Observations were made of the near backward scattering of polarized laser light from air bubbles in a highly viscous oil and in water. Both the co-polarized and the cross-polarized scattering were observed to be enhanced due to the axial focusing of glory rays. A physical-optics model for this enhancement is described which corrects for the divergence of the backscattered irradiance predicted by geometric optics. A sum of glory and axial wave amplitudes reproduces the results of Mie theory for the near backward scattering from bubbles in water. We also model scattering from glass microspheres in water and show that proper choice of the glass gives an additional enhancement due to rainbow scattering in the backward direction. Such spheres may be useful as isotropic retroreflectors in water. The scattering of circularly-polarized incident light is also considered.

Paper Details

Date Published: 27 September 1984
PDF: 12 pages
Proc. SPIE 0489, Ocean Optics VII, (27 September 1984); doi: 10.1117/12.943297
Show Author Affiliations
Philip L. Marston, Washington State University (United States)
Dean S. Langley, Washington State University (United States)


Published in SPIE Proceedings Vol. 0489:
Ocean Optics VII
Marvin A. Blizard, Editor(s)

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