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On coherent radiation scattered by random ensembles
Journal article   Peer reviewed

On coherent radiation scattered by random ensembles

Guoyao Yu, V.L. Newhouse and D. Censor
Journal of sound and vibration, v 122(3), pp 399-412
1988
DOI: https://doi.org/10.1016/S0022-460X(88)80089-0
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Abstract

It is known that when regions of randomly distributed scatterers containing volume density gradients are illuminated by coherent radiation, backscattered radiation is produced which generally contains both spatially coherent and incoherent components. The ratio of coherent to incoherent power is a measure of the scatterer volume density. It has been conjectured that even homogeneously distributed scatterers, when illuminated by properly selected coherent radiation with suitable temporal and/or spatial dependence, should also produce a mixture of coherent and incoherent backscattering whose ratio is a measure of the local scatterer volume density. It is shown here that under circumstances when multiple scattering is insignificant, homogeneously distributed scatterers illuminated by coherent radiation do produce spatially coherent scattering, but only in the direction of the incident wave. Therefore, the information contained in coherent scattered radiation by such ensembles can be obtained only in the direction of incident wave.

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Web of Science research areas
Acoustics
Engineering, Mechanical
Mechanics
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