Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 València, Spain.
Sensors (Basel). 2019 Oct 5;19(19):4313. doi: 10.3390/s19194313.
In this work, we present a thorough analysis on M-bonacci zone plates for ultrasound focusing applications. These planar lenses are capable of providing bifocal focusing profiles with equal intensity in both foci and become very appealing for a wide range of scenarios including medical and industrial applications. We show that in high-wavelength domains, such as acoustics or microwaves, the separation between both foci can be finely adjusted at the expense of slightly increasing the distortion of the focusing profile, and we introduce a design parameter to deal with this issue and simplify the design process of these lenses. Experimental measurements are in good agreement with numerical simulations and demonstrate the potential of M-bonacci lenses in ultrasound focusing applications.
在这项工作中，我们对用于超声聚焦应用的 M-布诺尼区板进行了全面分析。这些平面透镜能够提供具有相等强度的双焦点聚焦轮廓，对于包括医疗和工业应用在内的广泛场景非常有吸引力。我们表明，在高波长域，如声学或微波，两个焦点之间的距离可以通过稍微增加聚焦轮廓的失真来精细调整，我们引入了一个设计参数来解决这个问题，并简化这些透镜的设计过程。实验测量与数值模拟吻合良好，证明了 M-布诺尼透镜在超声聚焦应用中的潜力。
