Acoustic resonance focusing lens and design method thereof

A technology of focusing lens and acoustic resonance, which is applied to lenses, optics, sound-producing instruments, etc., can solve the problems of few application occasions, complicated design methods, etc., and achieve the effects of low cost, simple production and use methods, and simple processing technology.

Active Publication Date: 2019-01-01
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

These patents all use the basic principles of phononic crystals and negative refraction to a certain extent, and provide a new method for the design of acoustic focusing, but there are problems such as complex design methods or few application occasions among them.

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  • Acoustic resonance focusing lens and design method thereof
  • Acoustic resonance focusing lens and design method thereof
  • Acoustic resonance focusing lens and design method thereof

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted here that: in the drawings or descriptions in the specification, the same part uses the same figure number. Furthermore, while specific parameters are provided in the present disclosure, it is to be understood that the parameters need not be exactly equal to the respective values, but can be approximately equal to the respective values ​​within accepted error margins and design constraints.

[0031] An embodiment of the present invention provides an acoustic resonant focusing lens, such as figure 1 as shown, figure 1 It is a schematic diagram of the three-dimensional structure of the acoustic resonance focusing lens of the present invention. The focusing lens includes a scattering resonator unit 1 and a ...

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Abstract

The invention discloses an acoustic resonance focusing lens and a design method thereof, which belong to the field of physical acoustics. The acoustic resonance focusing lens has an artificial periodic acoustic structure composed of a base body, a plurality of local resonance-type scatterer units and a base, wherein the base body material can be air and water, each scatterer unit is in a cruciformshape, cells in the resonance focusing lens are arranged periodically in the form of a square lattice, the peripheral contour of the lens main body presents a cuboid, and the main body is arranged onthe lens base. The basic principle of a photonic crystal local resonance cavity and acoustic wave negative refraction is used to design the acoustic resonance focusing lens, and compared with the existing acoustic focusing lens, the acoustic resonance focusing lens has a simple structure, is thinner in thickness and can achieve good acoustic wave focusing effects for planar waves and spherical waves in various media.

Description

technical field [0001] The invention relates to a design method of an acoustic resonance focusing lens, which belongs to the field of physical acoustics. Background technique [0002] In 2000, J.B.Pendry proposed the idea of ​​using negative refraction to make optically perfect lenses. In 2008, Alexey Suckhovich first experimentally confirmed that negative refraction of ultrasonic waves exists in a two-dimensional prism-shaped phononic crystal, and the propagation direction of sound waves can be judged by the gradient change direction of the isofrequency diagram of the cell. This shows that the acoustic perfect lens can also be realized by using the phononic crystal and the principle of negative refraction, so as to realize the sound wave focusing. Acoustic perfect lenses and acoustic metalens have become research hotspots in the field of acoustic wave focusing since 2008. By 2015, Nadège Kaina1 published an article in the journal Nature, designing a single negative metama...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/30G02B3/12
CPCG10K11/30G02B3/12
Inventor 梁旭阮永都吕恒邓禹王体涛王玉红
Owner ZHEJIANG UNIV
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