基于狭缝光栅的一维集成成像双视3D显示

摘要

Dual-view integral imaging (DVII) three-dimensional (3D) display presents two different 3D images in the left and right viewing directions, respectively. However, the low resolution limits the applications of the DVII 3D display. This paper proposes a one-dimensional DVII 3D display based on a parallax barrier. The element image array is composed of two sets of alternating elemental images. The two sets of elemental images are captured from two different 3D scenes, respectively. The mathematical relation between the pitches of elemental image and slit is deduced through geometrical optics. According to the width of the 3D viewing zone, the calculation formula of the viewing angle is obtained. The mathematical relation between the optimal viewing distance and the parameters of the one-dimensional DVII 3D display is also analyzed. A prototype of the one-dimensional DVII 3D display based on the parallax barrier is developed to verify the principle. The 3D scene"CS" is obtained between 18° and 2° to the left, while the 3D scene 'SC' is seen between 2° and 18° to the right.%集成成像双视3D显示是集成成像3D显示技术与双视显示技术的结合,可以在不同的观看方向上呈现不同的3D图像.但是,现有的集成成像双视3D显示存在分辨率较低的缺点.基于此,该文提出了一种基于狭缝光栅的一维集成成像双视3D显示.微图像阵列由两组图像元相间排列组成,两组图像元分别从两个不同的3D场景拍摄获取.首先根据几何光学推导出图像元节距与狭缝节距的数理关系,然后根据3D视区宽度推导出观看视角的计算公式,并分析了最佳观看距离与系统结构参数的数理关系.建立了一维集成成像双视3D显示样机,在左18°~左2°范围内观看到3D场景"CS",而在右2°~右18°范围内观看到3D场景"SC".