Hua Jianyu, Zhou Fengbin, Xia Zhongwen, Qiao Wen, Chen Linsen
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China.
Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China.
Nanophotonics. 2023 Jan 13;12(2):285-295. doi: 10.1515/nanoph-2022-0637. eCollection 2023 Jan.
Glasses-free three-dimensional (3D) display has attracted wide interest for providing stereoscopic virtual contents with depth cues. However, how to achieve high spatial and angular resolution while keeping ultrawide field of view (FOV) remains a significant challenge in 3D display. Here, we propose a light field 3D display with space-variant resolution for non-uniform distribution of information and energy. The spatial resolution of each view is modulated according to watching habit. A large-scale combination of pixelated 1D and 2D metagratings is used to manipulate dot and horizontal line views. With the joint modulation of pixel density and view arrangement, the information density and illuminance of high-demand views are at most 5.6 times and 16 times that of low-demand views, respectively. Furthermore, a full-color and video rate light field 3D display with non-uniform information distribution is demonstrated. The prototype provides 3D images with a high spatial resolution of 119.6 pixels per inch and a high angular resolution of 0.25 views per degree in the high-demand views. An ultrawide viewing angle of 140° is also provided. The proposed light field 3D display does not require ultrahigh-resolution display panels and has form factors of thin and light. Thus, it has the potential to be used in portable electronics, window display, exhibition display, as well as tabletop display.
无眼镜三维（3D）显示因能提供具有深度线索的立体虚拟内容而备受关注。然而，在3D显示中，如何在保持超宽视野（FOV）的同时实现高空间分辨率和角分辨率仍是一项重大挑战。在此，我们提出一种具有空间可变分辨率的光场3D显示器，用于信息和能量的非均匀分布。每个视图的空间分辨率根据观看习惯进行调制。采用像素化一维和二维超光栅的大规模组合来操纵点视图和水平线视图。通过像素密度和视图排列的联合调制，高需求视图的信息密度和照度分别最多是低需求视图的5.6倍和16倍。此外，还展示了一种具有非均匀信息分布的全彩色和视频速率光场3D显示器。该原型在高需求视图中提供了每英寸119.6像素的高空间分辨率和每度0.25个视图的高角分辨率的3D图像。还提供了140°的超宽视角。所提出的光场3D显示器不需要超高分辨率显示面板，并且具有轻薄的外形尺寸。因此，它有潜力应用于便携式电子设备、橱窗展示、展览展示以及桌面展示。
