Adjustable sub-wavelength acoustic imaging super lens

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.

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...

AI Technical Summary

Problems solved by technology

In fact, the target frequency of most acoustic imaging applications often changes, so due to structural limitations, the application range of traditional acoustic imaging lenses is limited

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