Dai Piao, Lv Guoqiang, Wang Zi, Zhang Xu, Gong Xin, Feng Qibin
Appl Opt. 2019 Oct 20;58(30):8207-8212. doi: 10.1364/AO.58.008207.
A method in which an integral-imaging-based holographic stereogram (HS) using a moving array lenslet technique (MALT) and aperture array filter toward improving the resolution of a reconstructed three-dimensional (3D) image is presented. The previous resolution-enhanced HS using the MALT method only considered enhancement of the sampling rate without decreasing the volume pixels (voxels) size. The voxels are created by multiple plane waves in different directions emitting from holographic elements (hogels), and the voxel size is equal to the width of plane waves. In order to further improve the resolution of the reconstructed image quality, an aperture array filter is applied to allow the center square part of each plane wave to pass and filter the rest. The filtering process reduces the width of plane waves, and decreases the voxel size as well. The proposed method has a high sampling rate and can reconstruct the 3D image with smaller voxels. The image quality improvement is verified in numerical and optical reconstruction compared to the HS using MALT alone.
提出了一种基于积分成像的全息立体图（HS）方法，该方法使用移动阵列微透镜技术（MALT）和孔径阵列滤波器来提高重建三维（3D）图像的分辨率。先前使用MALT方法的分辨率增强型HS仅考虑提高采样率，而没有减小体素大小。体素由全息元件（全息图元）发射的不同方向的多个平面波创建，体素大小等于平面波的宽度。为了进一步提高重建图像质量的分辨率，应用孔径阵列滤波器使每个平面波的中心方形部分通过并过滤其余部分。滤波过程减小了平面波的宽度，也减小了体素大小。所提出的方法具有高采样率，并且可以用更小的体素重建3D图像。与仅使用MALT的HS相比，通过数值和光学重建验证了图像质量的提高。
