Liu Su-Juan, Xiao Dan, Li Xiao-Wei, Wang Qiong-Hua
Appl Opt. 2018 Jan 1;57(1):A86-A90. doi: 10.1364/AO.57.000A86.
In this paper, a computer-generated hologram (CGH) generation method is proposed to increase the field of view (FOV) in the holographic display. The CGH is generated through accumulating interference patterns of all object points. The size of each interference pattern is equal to the sum of the size of the recorded object and the spatial light modulator (SLM), so the size of the interference pattern is increased. The position of the interference pattern is related to that of the corresponding recorded object point. In the reconstruction process, three SLMs in a planar configuration are used to load the CGH. The seams between the SLMs are eliminated by beam splitters. Meanwhile, the boundaries of the diffraction light of all interference patterns are parallel with each other. Compared with the holographic display method using one SLM, the experiments demonstrate that the proposed method can reduce the demand for viewing distance and expand the FOV obviously in the horizontal direction, especially for the large-sized recorded object.
本文提出了一种计算机生成全息图（CGH）生成方法，以增加全息显示中的视场（FOV）。通过累积所有物体点的干涉图样来生成CGH。每个干涉图样的尺寸等于记录物体和空间光调制器（SLM）的尺寸之和，因此干涉图样的尺寸增大。干涉图样的位置与相应记录物体点的位置相关。在重建过程中，采用平面配置的三个SLM来加载CGH。分束器消除了SLM之间的接缝。同时，所有干涉图样的衍射光边界相互平行。与使用一个SLM的全息显示方法相比，实验表明，该方法可以减少对视距的要求，并在水平方向上显著扩大视场，特别是对于大尺寸记录物体。
