Acoustic Luneburg Lens as a New Sonar System

Sang Hoon Kim

doi:10.4028/www.scientific.net/AMM.763.101

Paper Titles

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To the Question of Determining the Plasticity Zones of a Welded Joint of Large Diameter Pipes
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A Study on a Primary Suspension for Improvement of Curving Performance of an Active Steering Bogie
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Acoustic Luneburg Lens as a New Sonar System
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Green Ventilation System Design for Underground Garage
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Base Algorithms of the Direct Adaptive Position-Path Control for Mobile Objects Positioning
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In Situ Damage Assessment on Supporting Structure of Coal Conveyor
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 763Acoustic Luneburg Lens as a New Sonar System

Acoustic Luneburg Lens as a New Sonar System

Abstract:

Luneburg lens is a gradient index lens that focuses the incoming wave to the opposite side of the lens without aberration. We developed a two-dimensional acoustic Luneburg lens by variable density method of space inside the lens. The lens is composed of hundreds of aluminum columns with various radii of less than 1cm. We tested the ability as sonar in the air. It focuses the incoming acoustic wave on the edge of the opposite side of the lens as well in the frequency range of 1,000Hz ~ 3,000Hz. It showed a dynamic response depending on the motion of the acoustic source. It could be a strong candidate of a next generation of sonar.