Opt Express. 2023 Jan 16;31(2):3072-3082. doi: 10.1364/OE.480095.
Electro-holography is a promising 3D display technology, as it can, in principle, account for all visual cues. Computing the interference patterns to drive them is highly calculation-intensive, requiring the design and development of efficient computer-generated holography (CGH) algorithms to facilitate real-time display. In this work, we propose a new algorithm for computing the CGH for arbitrary 3D curves using splines, as opposed to previous solutions, which could only draw planar curves. The solutions are analytically expressed; we conceived an efficiently computable approximation suitable for GPU implementations. We report over 55-fold speedups over the reference point-wise algorithm, resulting in real-time 4K holographic video generation of complex 3D curved objects. The proposed algorithm is validated numerically and optically on a holographic display setup.
电子全息术是一种很有前途的 3D 显示技术，因为它原则上可以考虑到所有的视觉线索。计算用于驱动它们的干涉模式需要高度的计算密集度，需要设计和开发有效的计算机生成全息图 (CGH) 算法来实现实时显示。在这项工作中，我们提出了一种新的算法，使用样条曲线来计算任意 3D 曲线的 CGH，而不是以前的解决方案，以前的解决方案只能绘制平面曲线。这些解决方案是用解析表达式表示的；我们构思了一种适合 GPU 实现的高效可计算近似值。与参考的逐点算法相比，我们报告了超过 55 倍的速度提升，从而实现了复杂 3D 曲面物体的实时 4K 全息视频生成。该算法在全息显示设置上进行了数值和光学验证。
