Universal Communication Research Institute, National Institute of Information and Communications Technology, 4-2-1 Nukui-kitamachi, Koganei, Tokyo 184-8795, Japan.
Sci Rep. 2014 Aug 22;4:6177. doi: 10.1038/srep06177.
In this paper, we propose a new method of using multiple spatial light modulators (SLMs) to increase the size of three-dimensional (3D) images that are displayed using electronic holography. The scalability of images produced by the previous method had an upper limit that was derived from the path length of the image-readout part. We were able to produce larger colour electronic holographic images with a newly devised space-saving image-readout optical system for multiple reflection-type SLMs. This optical system is designed so that the path length of the image-readout part is half that of the previous method. It consists of polarization beam splitters (PBSs), half-wave plates (HWPs), and polarizers. We used 16 (4 × 4) 4K×2K-pixel SLMs for displaying holograms. The experimental device we constructed was able to perform 20 fps video reproduction in colour of full-parallax holographic 3D images with a diagonal image size of 85 mm and a horizontal viewing-zone angle of 5.6 degrees.
在本文中，我们提出了一种新的方法，使用多个空间光调制器 (SLM) 来增加使用电子全息术显示的三维 (3D) 图像的大小。之前的方法所产生的图像的可扩展性有一个上限，这个上限是由图像读出部分的光程推导出来的。我们通过为多个反射式 SLM 设计的新的节省空间的图像读出光学系统，成功地生成了更大的彩色电子全息图像。该光学系统的设计使得图像读出部分的光程是之前方法的一半。它由偏振分光器 (PBS)、半波片 (HWP) 和偏振器组成。我们使用 16 个 (4×4) 4K×2K 像素 SLM 来显示全息图。我们构建的实验设备能够以 20 fps 的帧率在彩色全视差全息 3D 图像中进行视频再现，图像对角线尺寸为 85mm，水平视场角为 5.6 度。
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