Study on table-top optical system enlarging viewing-zone for displaying holographic aerial image
Study on table-top optical system enlarging viewing-zone for displaying holographic aerial image
复制标题
DOI：
10.1117/12.2545843
复制
发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Takahiro Kobayakawa;Y. Sakamoto
中科院分区：
文献类型：
--
作者：
Takahiro Kobayakawa;Y. Sakamoto
航空图像预计将在未来积极用于娱乐领域，并且正在进行各种研究以实现这一目标。电子全息术显示出在未来显示高质量空间图像的前景，但缺点是观察者可以观察到重构图像的范围的观察区窄。电子全息术的观看区域由显示设备的像素间距确定（例如，液晶显示器）。像素间距越小，可视区域越大，因此更高性能的显示设备是解决这个问题的最佳方法。然而，当前使用的显示设备的像素间距不够小，并且不可能显著地提高性能。在这项工作中，我们提出了一个桌面光学系统，利用计算全息计算方法的基础上，傅里叶变换全息计算，扩大了电子全息的观看区域，而不管显示设备的性能。当显示装置的尺寸较大时，所提出的光学系统可以显示具有较宽视域的空间图像，因此即使当前的显示装置也可以再现具有较宽视域的空间图像。
Aerial images are expected to be actively used in the entertainment field in the future,and various research is being conducted to achieve this. Electro-holography shows promise for displaying high-quality aerial images in the future,but the disadvantage is that the viewing zone, which is the range where the observer can observe the reconstructed image,is narrow. The viewing zone of an electro-holography is determined by the pixel pitch of the display device (e.g.,a liquid crystal display). The smaller the pixel pitch, the larger the viewing zone, so it makes sense that a higher performing display device would be the best way to solve this problem. However, the pixel pitch of the currently used display devices are not sufficiently small, and significant improvements in performance are not likely. In this work, we propose a tabletop optical system utilizing a CGH calculation method based on Fourier transform holographic calculation that expands the viewing zone of an electronic holography regardless of the performance of the display device. The proposed optical system can display an aerial image with a wider viewing zone when the size of the display device is larger, so even a current display device can reproduce an aerial image with a wider viewing zone.