Li Yi-Long, Wang Di, Li Nan-Nan, Wang Qiong-Hua
Opt Express. 2020 Oct 12;28(21):32185-32198. doi: 10.1364/OE.403252.
In this paper, a fast hologram generation method is proposed based on the optimal segmentation of a sub-computer-generated-hologram (sub-CGH). The relationship between the pixels on the hologram and the corresponding reconstructed image is calculated firstly. Secondly, the sub-CGH corresponding to the object point from the recorded object is optimized and divided into the optimized diffraction area and the invalid diffraction area. Then, the optimized diffraction area of the sub-CGH for each object point is pre-calculated and saved. Finally, the final hologram can be generated by superimposing all the sub-CGHs. With the proposed method, the calculation time for the final hologram can be significantly reduced and the quality of the reconstructed image is not affected. Moreover, the proposed method has the advantages of perspective enlargement compared with the traditional method, and the experiment results verify its feasibility.
本文提出了一种基于子计算全息图（sub-CGH）最优分割的快速全息图生成方法。首先计算全息图上像素与相应重建图像之间的关系。其次，对记录物体中物点对应的子计算全息图进行优化，划分为优化衍射区域和无效衍射区域。然后，预先计算并保存每个物点子计算全息图的优化衍射区域。最后，通过叠加所有子计算全息图生成最终全息图。采用该方法可显著减少最终全息图的计算时间，且不影响重建图像质量。此外，与传统方法相比，该方法具有视角放大的优点，实验结果验证了其可行性。
