中国激光, 2010, 37 (S1): 213, 网络出版: 2010-10-29
基于正交柱透镜光栅的计算全息三维成像
Three-Dimensional Imaging Based on Orthogonal-Stacked Lenticular Sheets and Computer Holography
计算全息 三维成像 正交柱透镜光栅 子图像阵列 基元图像阵列 computer holography three-dimensional imaging orthogonal-stacked lenticular sheets sub-image array elemental image array
摘要
提出了一种基于正交柱透镜光栅的计算全息三维成像方法。该方法采用CCD获取三维场景经过正交柱透镜光栅后所形成的基元图像阵列, 并采用正交投影方法对获取的基元图像阵列进行像素重组, 从而获取子图像阵列。根据透镜的傅里叶变换特性, 对每幅子图像乘以相应的倾斜因子进行积分运算得到全息面上对应点的复振幅。然后通过编码获得三维场景的傅里叶全息图。依据菲涅耳衍射理论, 在计算机中对获得的全息图进行模拟再现, 在不同再现距离上获得处于不同深度位置上的两个骰子的清晰再现, 表明该方法可实现对三维场景的计算全息成像。
Abstract
A novel three-dimensional (3D) imaging method based on orthogonal-stacked lenticular sheets and computer holography is proposed. Elemental image array (EIA) of 3D object propagated through the orthogonal-stacked lenticular sheets (OLS) are captured by a CCD camera. Sub-image array (SIA) used for generating the Fourier hologram of 3D object is obtained by recombination operation of the EIA. A complex value point in the hologram plane is determined by the two-dimensional (2D) integral operation after the corresponding sub-image is multiplied by an inclination phase factor. Numerical reconstruction of the calculated Fourier hologram at different distances based on Fresnel diffraction shows that the method is feasible for 3D imaging.
郑华东, 代林茂, 于瀛洁. 基于正交柱透镜光栅的计算全息三维成像[J]. 中国激光, 2010, 37(S1): 213. Zheng Huadong, Dai Linmao, Yu Yingjie. Three-Dimensional Imaging Based on Orthogonal-Stacked Lenticular Sheets and Computer Holography[J]. Chinese Journal of Lasers, 2010, 37(S1): 213.