Tsang P W M, Chow Y-T, Poon T-C
Opt Express. 2014 Oct 20;22(21):25208-14. doi: 10.1364/OE.22.025208.
We present a novel non-iterative method for generating phase-only Fresnel holograms. The intensity image of the source object scene is first down-sampled with uniform grid-cross lattices. A Fresnel hologram is then generated from the intensity and the depth information of the sampled object points. Subsequently, only the phase component of the hologram is preserved, resulting in a pure phase hologram that we call the sampled-phase-only hologram (SPOH). Experimental evaluation reveals that the numerical, as well as the optical reconstructed images of the proposed phase-only hologram derived with our method are of high visual quality. Moreover, the reconstructed optical image is brighter, and less affected by phase noise contamination on the hologram as compared with those generated with existing error-diffusion approaches.
我们提出了一种用于生成纯相位菲涅耳全息图的新型非迭代方法。首先，利用均匀网格交叉晶格对源物体场景的强度图像进行下采样。然后，根据采样物体点的强度和深度信息生成菲涅耳全息图。随后，仅保留全息图的相位分量，从而得到一个纯相位全息图，我们将其称为采样纯相位全息图（SPOH）。实验评估表明，用我们的方法导出的所提出的纯相位全息图的数值重建图像和光学重建图像都具有很高的视觉质量。此外，与使用现有误差扩散方法生成的图像相比，重建的光学图像更亮，并且受全息图上相位噪声污染的影响更小。
