Pi Dapu, Liu Juan, Yu Shuang
Appl Opt. 2021 Sep 1;60(25):7640-7647. doi: 10.1364/AO.432244.
Nowadays, curved computer-generated holograms are widely applied to increase the field of view. However, heavy computational load restricts the development of curved computer-generated holograms. In this paper, we propose a two-step acceleration calculation method to generate curved holograms by using the intermediate plane, which is placed between the object and a curved computer-generated hologram. The first step is the calculation of the intermediate plane by an improved accurate highly compressed lookup-table method. In the second step, we execute diffraction calculation from the intermediate plane to obtain a curved computer-generated hologram. Numerical simulations and optical experiments are performed to demonstrate that the proposed method is an efficient method for reducing calculation time. Additionally, the increase of field of view using a curved hologram is also numerically demonstrated. It is expected that our method can be combined with a curved display screen to realize three-dimensional holographic displays in the future.
如今，弯曲的计算机生成全息图被广泛应用于扩大视野。然而，繁重的计算负荷限制了弯曲计算机生成全息图的发展。在本文中，我们提出了一种两步加速计算方法，通过使用放置在物体和弯曲计算机生成全息图之间的中间平面来生成弯曲全息图。第一步是通过改进的精确高压缩查找表方法计算中间平面。第二步，我们从中间平面执行衍射计算以获得弯曲的计算机生成全息图。进行了数值模拟和光学实验，以证明所提出的方法是减少计算时间的有效方法。此外，还通过数值证明了使用弯曲全息图扩大视野的效果。预计我们的方法将来可以与弯曲显示屏相结合，以实现三维全息显示。
