Tsang P W M, Liu J-P, Lam H, Poon T-C
Opt Express. 2021 Aug 2;29(16):25488-25498. doi: 10.1364/OE.430776.
A sampled phase-only hologram (SPOH) is the phase component of the hologram of an object image with pixels being sampled with a periodic grid-cross pattern. The reconstructed image of a SPOH is a sparse image with abundant empty voids and degradation in sharpness and contrast. In this paper we proposed a method based on a new sampling scheme, together with stochastic binary search (SBS), to obtain an optimal sampling lattice that can be applied to generate phase-only holograms with enhanced reconstructed image. Experimental results show that with our proposed method, the fidelity and quality of the reconstructed image are increased.
采样纯相位全息图（SPOH）是物体图像全息图的相位分量，其像素通过周期性网格交叉图案进行采样。SPOH的重建图像是一个稀疏图像，有大量空白区域，清晰度和对比度也会下降。在本文中，我们提出了一种基于新采样方案并结合随机二分搜索（SBS）的方法，以获得一种最优采样晶格，可用于生成具有增强重建图像的纯相位全息图。实验结果表明，使用我们提出的方法，重建图像的保真度和质量得到了提高。
