Strong Backscattering And Cross Polarization From Bubbles And Glass Spheres In Water

Philip L. Marston; Dean S. Langley

doi:10.1117/12.943297

27 September 1984 Strong Backscattering And Cross Polarization From Bubbles And Glass Spheres In Water

Philip L. Marston, Dean S. Langley

Proceedings Volume 0489, Ocean Optics VII; (1984) https://doi.org/10.1117/12.943297
Event: Ocean Optics VII, 1984, Monterey, United States

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.

Citation Download Citation

Philip L. Marston and Dean S. Langley "Strong Backscattering And Cross Polarization From Bubbles And Glass Spheres In Water", Proc. SPIE 0489, Ocean Optics VII, (27 September 1984); https://doi.org/10.1117/12.943297

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