Yang Le, Sang Xinzhu, Yu Xunbo, Liu Boyang, Yan Binbin, Wang Kuiru, Yu Chongxiu
Opt Express. 2018 Dec 24;26(26):34412-34427. doi: 10.1364/OE.26.034412.
A crosstalk-suppressed dense multi-view light-field display based on real-time light-field pickup and reconstruction is demonstrated, which is capable of realizing high view density in the horizontal direction with low crosstalk between micro-pitch viewing zones. The micro-pinhole unit array and the vertically-collimated backlight are specially developed and used, instead of refraction-based optical components like lenticular lens, to avoid aberrations and to suppress crosstalk for accurately projecting multiple view perspectives into each eye pupil of the viewer. Additionally, the spatial information entropy is defined and investigated to improve 3D image perception for balancing resolution, which can be generally applicable to better-reconstructed 3D images with the limited number of resolution pixels. To enlarge the viewing angle of 3D images with smooth motion parallax, the novel high-efficient light-field pickup and reconstruction method based on the real-time position of the viewer's pupils is implemented with an eye tracker to scan 750 view perspectives with the correct geometric occlusion in real time at the frame rate of 40 fps. In the experiment, a floating horizontal-parallax 3D light-field image with the view density of 0.75 mm and the micro-pitch crosstalk of less than 7% can be perceived with the clear floating focus depth of 10 cm and the high resolution of 1920 × 1080 in the viewing angle of 70°.
展示了一种基于实时光场采集与重建的串扰抑制密集多视图光场显示器，它能够在水平方向实现高视图密度，同时微间距观看区域之间的串扰较低。专门开发并使用了微针孔单元阵列和垂直准直背光源，而不是像柱面透镜这样基于折射的光学元件，以避免像差并抑制串扰，从而将多个视图视角准确地投射到观看者的每个眼睛瞳孔中。此外，定义并研究了空间信息熵，以改善3D图像感知以平衡分辨率，这通常适用于具有有限分辨率像素数量的更好重建的3D图像。为了扩大具有平滑运动视差的3D图像的视角，基于观看者瞳孔实时位置的新型高效光场采集与重建方法通过眼动追踪器实现，以40帧/秒的帧率实时扫描750个具有正确几何遮挡的视图视角。在实验中，可以在70°视角下以1920×1080的高分辨率、10厘米的清晰浮动焦深感知到视图密度为0.75毫米且微间距串扰小于7%的浮动水平视差3D光场图像。
