Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields
Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields
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DOI：
10.1145/2850414
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发表时间：
2016-05-01
影响因子：
6.2
通讯作者：
Hayasaki, Yoshio
中科院分区：
文献类型：
--
作者：
Ochiai, Yoichi;Kumagai, Kota;Hayasaki, Yoshio
我们提出了一种使用飞秒激光绘制航空和体积图形的方法。高强度激光激发物理物质，使其在任意三维位置发光。因此，可以探索流行的应用，特别是因为飞秒激光诱导的等离子体比纳秒激光产生的等离子体危害更小。用飞秒激光在空气中绘制图形有两种方法：使用空间光调制技术产生全息图和用电流镜扫描激光束。这里提出的系统的全息图和工作空间占据了高达1厘米(3)的体积；然而，根据光学设备及其设置的不同，该尺寸是可缩放的。本文详细介绍了该系统的原理、系统设置和实验评估，并讨论了该系统的可扩展性、设计空间和应用。我们测试了两个激光光源：一台可调(30-100fS)激光器，最高可发射1,000个脉冲/S，能量高达7mJ/脉冲；一台269微秒激光，最高可发射200,000脉冲/S，能量高达50微焦耳/脉冲。我们证实，使用这些激光光源实现的体显示的时空分辨率分别为4000和20万点/S。虽然我们主要关注激光在空气中诱导的等离子体，但这里的讨论也适用于其他渲染原理，如固体或液体材料中的荧光和微气泡。
We present a method of rendering aerial and volumetric graphics using femtosecond lasers. A high-intensity laser excites physical matter to emit light at an arbitrary three-dimensional position. Popular applications can thus be explored, especially because plasma induced by a femtosecond laser is less harmful than that generated by a nanosecond laser. There are two methods of rendering graphics with a femtosecond laser in air: producing holograms using spatial light modulation technology and scanning of a laser beam by a galvano mirror. The holograms and workspace of the system proposed here occupy a volume of up to 1 cm(3); however, this size is scalable depending on the optical devices and their setup. This article provides details of the principles, system setup, and experimental evaluation, and discusses the scalability, design space, and applications of this system. We tested two laser sources: an adjustable (30-100fs) laser that projects up to 1,000 pulses/s at an energy of up to 7mJ/pulse and a 269fs laser that projects up to 200,000 pulses/s at an energy of up to 50 mu J/pulse. We confirmed that the spatiotemporal resolution of volumetric displays implemented using these laser sources is 4,000 and 200,000 dots/s, respectively. Although we focus on laser-induced plasma in air, the discussion presented here is also applicable to other rendering principles such as fluorescence and microbubbles in solid or liquid materials.