Remote sensing of underwater acoustic fields
AssigneeCommonwealth Scientific and Industrial Research Organisation Australia and Defence Science and Technology Organisation
InventorsBarry John Martin, John Chester Wendoloski
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Abstract
An acoustic field in a body of water is monitored using a coherent light field emitter applying a distributed light field across the surface of the water to be reflected, and a sensor is used to sense reflected components of the light field above the surface and to provide a signal representing information in the reflected light and related to movements in the water and caused by the acoustic field. The signal is provided from an interferometry technique and useable to derive information on the underwater acoustic field in a useful form.
Claims31
A method of monitoring an acoustic field in a body of water comprising applying a coherent light field emitted from above a body of water and onto its surface with a distribution of the light across the surface for reflection to a remote sensing location above the surface with a reflected light field carrying information relating to movements in the body of water resulting from an acoustic field within the body of water, whereby by using interferometry the reflected light field may be analysed to provide information on the underwater acoustic field.
(canceled)
An apparatus for monitoring an acoustic field in a body of water comprising a coherent light field emitter for applying a distributed light field across the surface of the body of water, to be reflected, a sensor for sensing reflected components of the light field above the surface and providing a signal representing information in the reflected light related to movements in the body of the water, the signal being provided from an interferometry technique permits derivation of the information on the underwater acoustic field in a useful form.
Dependencies are inferred from the claim text.