论文标题
通过三维声音luneburg meta镜与晶格柱进行声学成像
Acoustic imaging by three-dimensional acoustic Luneburg meta-lens with lattice columns
论文作者
论文摘要
与二维透镜相比，三维声音luneburg元镜具有折射声波，并以更高的声压聚焦。由塑料制成的透镜，直径为120毫米，设计了数千个晶格柱状元原子，以保持其三维形状。在5 kHz〜20 kHz的频率范围内模拟并测量了镜头的三维聚焦性能和声学成像。通过旋转镜头改变入射角并测量声压来确认全向性质。这些球形Luneburg元镜头的开发有望提高需要焦点焦点的设备的性能。
A three-dimensional acoustic Luneburg meta-lens has the advantage of refracting sound waves for all incident angles and focusing higher sound pressure compared to a two-dimensional lens. The lens made of plastic with a diameter of 120 mm was designed with thousands of lattice column-shaped meta-atoms to maintain its three-dimensional shape. The lens's three-dimensional focusing performance and acoustic imaging were simulated and measured at the frequency range of 5 kHz ~ 20 kHz. The omnidirectional property was confirmed by rotating the lens to change the incident angle and measuring the sound pressure. The development of these spherical Luneburg meta-lenses is expected to improve the performance of devices that require acoustic focusing.
