Acoustic levitation for multimodal volumetric display
Acoustic levitation for multimodal volumetric display
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DOI：
10.1117/12.2569328
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发表时间：
2020-08
期刊：
影响因子：
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通讯作者：
R. Hirayama;D. M. Plasencia;N. Masuda;S. Subramanian
中科院分区：
文献类型：
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作者：
R. Hirayama;D. M. Plasencia;N. Masuda;S. Subramanian
目前的显示方法，如VR，让我们可以瞥见多模式的3D体验，但用户需要戴上耳机和其他设备，才能欺骗我们的大脑，让我们相信我们看到、听到或感受到的内容是真实的。光场、全息或立体显示器避免了使用耳机，但它们限制了用户与耳机交互的能力（例如，用户的手无法触及内容，用户被限制在特定位置），并且最重要的是，仍然不能同时传递声音和触摸。在这次演讲中，我们将介绍多模态声学捕获显示器（MATD）：一种半空中的体积显示器，可以同时提供视觉，触觉和音频内容，使用超声换能器的相控阵列。MATD利用超声波捕获，快速移动并在半空中着色一个小颗粒，以创建我们肉眼可见的彩色体积形状。利用超声波传递的压力，MATD还可以产生我们赤手空拳就能感觉到的高压点，并引起空气振动，产生可听到的声音。该系统在垂直和水平方向上的颗粒速度分别高达8.75 m/s和3.75 m/s。此外，我们的技术提供了非接触，高速操纵物质的机会，在计算制造和生物医学中的应用。
Current display approaches, such as VR, allow us to get a glimpse of multimodal 3D experiences, but users need to wear headsets as well as other devices in order to trick our brains into believing that the content we are seeing, hearing or feeling is real. Light-field, holographic or volumetric displays avoid the use of headsets, but they constraint the user’s ability to interact with them (e.g. content is not reachable to user’s hands, user’s constrained to specific locations) and, most importantly, still cannot simultaneously deliver sound and touch. In this talk, we will present the Multimodal Acoustic Trapping Display (MATD): a mid-air volumetric display that can simultaneously deliver visual, tactile and audio content, using phased arrays of ultrasound transducers. The MATD makes use of ultrasound to trap, quickly move and colour a small particle in mid-air, to create coloured volumetric shapes visible to our naked eyes. Making use of the pressure delivered by the ultrasound waves, the MATD can also create points of high pressure that our bare hands can feel and induce air vibrations that create audible sound. The system demonstrates particle speeds of up to 8.75 m/s and 3.75 m/s in the vertical and horizontal directions, respectively. In addition, our technique offers opportunities for non-contact, highspeed manipulation of matter, with applications in computational fabrication and biomedicine.