Mie scattering used to determine spherical bubble oscillations

Linearly polarized laser light is scattered from an oscillating, acoustically levitated bubble, and the scattered intensity is measured with a suitable photodetector. The output photodetector current is converted into a voltage and digitized. For spherical bubbles, the scattered intensity I(rel)(R,t...

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Bibliographic Details
Published in:Applied optics (2004) 1990-10, Vol.29 (28), p.4182-4191
Main Authors: Holt, R G, Crum, L A
Format: Article
Language:English
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Summary:Linearly polarized laser light is scattered from an oscillating, acoustically levitated bubble, and the scattered intensity is measured with a suitable photodetector. The output photodetector current is converted into a voltage and digitized. For spherical bubbles, the scattered intensity I(rel)(R,theta,t) as a function of radius R and angle theta is calculated theoretically by solving the boundary value problem (Mie theory) for the water-bubble interface. The inverse transfer function R(I) is obtained by integrating over the photodetector solid angle centered at some constant theta. Using R(I) as a look-up table, the radius vs time [R(t)] response is calculated from the measured intensity vs time [I(exp)(R,t)].
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.29.004182