Yu Xunbo, Sang Xinzhu, Gao Xin, Yan Binbin, Chen Duo, Liu Boyang, Liu Li, Gao Chao, Wang Peiren
Opt Express. 2019 Sep 16;27(19):26738-26748. doi: 10.1364/OE.27.026738.
When employing the light field method with standard lens array and the holographic functional screen (HFS) to realize the tabletop three-dimensional (3D) display, the viewing area of the reconstructed 3D images is right above the screen. As the observers sit around the table, the generated viewpoints in the middle of the viewing area are wasteful. Here, a 360-degree viewable light-field display system is demonstrated, which can present 3D images to multiple viewers in ring-shaped viewing range. The proposed display system consists of the HFS, the aspheric conical lens array, a 27-inch LCD with the resolution of 3840×2160, the LEDs array and the Fresnel lens array. By designing the aspheric conical lens, the light rays emitting from the elemental images forms the viewpoints in a ring-type arrangement. And the corresponding coding method is given. Compared with the light field display with standard lens array, the viewpoint density is increased and the aliasing phenomenon is reduced. In the experiment, the tabletop light-field display based on aspheric conical lens array can present high quality 360-degree viewable 3D image with the right perception and occlusion.
当采用标准透镜阵列和全息功能屏幕（HFS）的光场方法来实现桌面三维（3D）显示时，重建的3D图像的观看区域就在屏幕上方。当观察者围坐在桌子周围时，观看区域中间生成的视点是浪费的。在此，展示了一种360度可视光场显示系统，它可以在环形观看范围内向多个观看者呈现3D图像。所提出的显示系统由HFS、非球面圆锥透镜阵列、分辨率为3840×2160的27英寸液晶显示器、发光二极管阵列和菲涅尔透镜阵列组成。通过设计非球面圆锥透镜，从基本图像发射的光线形成环形排列的视点。并给出了相应的编码方法。与采用标准透镜阵列的光场显示相比，视点密度增加，混叠现象减少。在实验中，基于非球面圆锥透镜阵列的桌面光场显示可以呈现具有正确感知和遮挡效果的高质量360度可视3D图像。
