Adjustable sub-wavelength acoustic imaging super lens

A super-lens and sub-wavelength technology, which is applied in the direction of sound-generating devices and instruments, can solve the problems of structural limitations and limited application range of acoustic imaging lenses, and achieve the effects of improved imaging performance, simple production, and good imaging effects

CN114049869APending Publication Date: 2022-02-15XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-02-15

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Abstract

The invention discloses an adjustable sub-wavelength acoustic imaging super lens, which comprises an upper-layer supporting part and a lower-layer supporting part for providing a supporting effect, and a thick tube and a thin tube for providing telescopic adjustability and a sound wave conduction effect, and is characterized in that one end of the thick tube and one end of the thin tube are respectively fixed in the upper-layer supporting part and the lower-layer supporting part according to respective corresponding sizes; and the integral combination forms the adjustable sub-wavelength acoustic imaging super lens. The working frequency of the super lens can be continuously adjusted, and the imaging performance, including the structure size, the imaging resolution and the like of an imaging object, of the super lens can be adjusted by changing the array period of the holes in the supporting structure and the diameter of the pipe. The whole structure is easy to manufacture, materials are easy to obtain, and the imaging effect is good. In conclusion, compared with a traditional fixed acoustic imaging lens, the working frequency of the adjustable sub-wavelength acoustic imaging super lens is effectively widened, and the adjustable sub-wavelength acoustic imaging super lens can be widely applied to various sub-wavelength size imaging fields.
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Description

Technical field

[0001] The present invention belongs to the field of acoustic devices, and specific relates to an adjustable sub-wavelength imaging hypererway. Background technique

[0002] Sound focus and imaging are widely used in the product, medical devices, industrial production and testing used in daily lives, so there is an extremely important position in the field of fluctuations. Most of the initial acoustic devices are developed than optical devices, however, although acoustic wave and optical waves have similar characteristics in certain aspects, there are many differences. In recent years, people have begun to achieve the modulation and treatment of acoustic waves different from the acoustic super material structure of traditional natural materials, and achieve many excellent acoustic properties. Sound focus and imaging technology have always been a hot topic in the field of acoustic research, and there are many key based on acoustic devices and instrument application...

Examples

Embodiment Construction

[0022] The technical solutions in the embodiments in the embodiments of the present invention will be described below in conjunction with the relevant calculations and measurement results of the embodiments of the invention. Obviously, the described embodiments are merely embodiments of the invention, not all of the cases. Based on the implementation cases in the present invention, those skilled in the art will belong to the scope of the present invention without creative labor premise.

[0023] (1) Design of adjustable subpoope long sound imaging super lens structure

[0024] The lens structure of the case figure 1 As shown, the upper support member and the lower support member, the crude metal tube and the fine metal tube are shown, wherein the upper support member and the lower support member are resin material, and the manufacturing, crude metal tube and fine metal tube are stainless steel metal by photocurable 3D. Material. On the one hand, the rough metal tube and the fine m...