The generation of acoustic vortex beams has attracted an increasing amount of research attention in recent years, offering a range of functions, including acoustic communication, particle manipulation, and biomedical ultrasound. However, incorporating more vortices and broadening the capacity of these beams and associated devices in three dimensions pose challenges. Traditional methods often necessitate complex transducer arrays and are constrained by conditions such as system complexity and the medium in which they operate. In this paper, a 3D printed acoustic lens capable of generating a double vortex pattern with an optional focusing profile in water was demonstrated. The performance of the proposed lens was evaluated through computational simulations using finite element analysis and experimental tests based on underwater measurements. The results indicate that by altering the positioning of the vortices’ axes, it is possible to control both the intensity and the location of the pressurized zone. The proposed approach shows promise for enhancing the effectiveness and versatility of various applications by generating a larger number of vortices and freely tailoring the focal profile with a single lens, thereby expanding the practical uses of acoustic vortex technology.

中文翻译：

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使用 3D 打印声学透镜和场复用产生水下双涡流

近年来，声涡流束的产生引起了越来越多的研究关注，提供了一系列功能，包括声学通信、粒子操纵和生物医学超声。然而，在三个维度上结合更多的涡流并扩大这些光束和相关设备的容量提出了挑战。传统方法通常需要复杂的换能器阵列，并且受到系统复杂性及其运行介质等条件的限制。本文展示了一种 3D 打印声学透镜，该透镜能够在水中生成具有可选聚焦轮廓的双涡旋图案。通过使用有限元分析的计算模拟和基于水下测量的实验测试来评估所提出的镜头的性能。结果表明，通过改变涡流轴的位置，可以控制加压区的强度和位置。所提出的方法有望通过产生大量涡流并用单个透镜自由定制焦点轮廓来增强各种应用的有效性和多功能性，从而扩大声学涡流技术的实际用途。