Aerial projection of three-dimensional motion pictures by electro-holography and parabolic mirrors.
Aerial projection of three-dimensional motion pictures by electro-holography and parabolic mirrors.
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DOI：
10.1038/srep11750
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发表时间：
2015-07-08
影响因子：
4.6
通讯作者：
Ito T
中科院分区：
文献类型：
--
作者：
Kakue T;Nishitsuji T;Kawashima T;Suzuki K;Shimobaba T;Ito T
我们展示了一个基于全息术的三维运动图像的航空投影系统。该系统由光源、与显示器相对应的空间光调制器和两个抛物面反射镜组成。空间光调制器显示由计算机计算的全息图，并能在调制器表面附近再现全息运动图像。两个抛物面镜可以投射出空间光调制器形成的运动画面的浮动3D图像，而无需机械扫描或旋转。在本演示中，我们使用了相位调制型空间光调制器。调制器的像素数和像素间距分别为1，080 × 1，920和8.0 μm × 8.0 μm。每个抛物面镜的直径、高度和焦距分别为288 mm、55 mm和100 mm。利用该调制器和反射镜构成的系统，我们成功地在空中投影了~ 2.5mm ~ 3的3D电影。此外，通过应用全息图的快速计算算法，我们实现了全息图计算在〜 12毫秒每全息图与4个CPU核心。
We demonstrate an aerial projection system for reconstructing 3D motion pictures based on holography. The system consists of an optical source, a spatial light modulator corresponding to a display and two parabolic mirrors. The spatial light modulator displays holograms calculated by computer and can reconstruct holographic motion pictures near the surface of the modulator. The two parabolic mirrors can project floating 3D images of the motion pictures formed by the spatial light modulator without mechanical scanning or rotating. In this demonstration, we used a phase-modulation-type spatial light modulator. The number of pixels and the pixel pitch of the modulator were 1,080 × 1,920 and 8.0 μm × 8.0 μm, respectively. The diameter, the height and the focal length of each parabolic mirror were 288 mm, 55 mm and 100 mm, respectively. We succeeded in aerially projecting 3D motion pictures of size ~2.5 mm3 by this system constructed by the modulator and mirrors. In addition, by applying a fast computational algorithm for holograms, we achieved hologram calculations at ~12 ms per hologram with 4 CPU cores.