Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles
Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles
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DOI：
10.1063/1.4976942
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发表时间：
2017-02-27
影响因子：
4
通讯作者：
Cox, B. T.
中科院分区：
文献类型：
--
作者：
Brown, M. D.;Nikitichev, D. I.;Cox, B. T.
多焦点声场在物理声学中有许多应用，从粒子操纵到神经调制。然而，使用传统的换能器技术在三维任意位置产生多个焦点是具有挑战性的。在这项工作中，证明了使用单个光脉冲在多点聚焦的声场的光产生。这是通过设计用于产生特定的、用户定义的波场的光吸收表面轮廓来实现的。开发了一种用于设计这些定制表面轮廓的优化方法。这种方法寻找一个平滑变化的表面，它将在一组目标焦点处产生一个高峰值压力。然后通过增材制造和吸收剂沉积技术的组合实现设计的表面轮廓。从一个设计用于产生数字“7”的样品的声场测量用于演示设计方法。(C) 2017作者：除另有说明外，所有文章内容均遵循知识共享署名（CC BY）许可协议
Acoustic fields with multiple foci have many applications in physical acoustics ranging from particle manipulation to neural modulation. However, the generation of multiple foci at arbitrary locations in three-dimensional is challenging using conventional transducer technology. In this work, the optical generation of acoustic fields focused at multiple points using a single optical pulse is demonstrated. This is achieved using optically absorbing surface profiles designed to generate specific, user-defined, wavefields. An optimisation approach for the design of these tailored surface profiles is developed. This searches for a smoothly varying surface that will generate a high peak pressure at a set of target focal points. The designed surface profiles are then realised via a combination of additive manufacturing and absorber deposition techniques. Acoustic field measurements from a sample designed to generate the numeral "7" are used to demonstrate the design method. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license