中国激光, 2019, 46 (1): 0109001, 网络出版: 2019-01-27
基于环形光瞳的光学扫描全息系统实现边缘提取 下载: 856次
Edge Extraction Based on Optical Scanning Holography System with Annular Pupils
全息 数字全息 光学扫描全息 边缘提取 环形光瞳滤波器 holography digital holography optical scanning holography edge extraction annular pupil filter
摘要
提出一种在光学扫描全息系统中采用环形光瞳滤波器来实现选择性边缘提取的方法, 基于双光瞳外差扫描技术使用单个二维光学扫描来获取三维物体的全息信息。首先, 采用小孔滤波器和环形光瞳滤波器作为两个光瞳来形成复合光场对物体进行扫描, 以提取物体的边缘信息; 其次, 通过移动并破坏环形光瞳滤波器的对称性, 并选择两个完全相同的环形光瞳滤波器来实现对物体各向异性的选择性提取。计算机仿真实验的结果表明, 通过在光学扫描全息系统中使用环形光瞳滤波器, 可以很好地实现各向同性与各向异性的选择性边缘提取。
Abstract
A method for selective edge extraction in an optical scanning holography system is proposed based on annular pupil filters, in which a single two-dimensional optical scan is used to acquire the holographic information of a three-dimensional object based on the two-pupil heterodyne scanning technique. First, a small aperture filter and an annular pupil filter are used as two pupils to form a composite light field for scanning an object and extracting the edge information of an object. Then, the selective extraction of the anisotropy of an object is achieved by moving and destroying the symmetry of an annular pupil filter and simultaneously selecting two identical annular pupil filters. The computer simulation results show that the selective edge extraction of isotropy and anisotropy can be well achieved by using annular pupil filters in an optical scanning holography system.
王仁德, 张亚萍, 王帆, 祝旭锋, 李重光, 张永安, 许蔚. 基于环形光瞳的光学扫描全息系统实现边缘提取[J]. 中国激光, 2019, 46(1): 0109001. Wang Rende, Zhang Yaping, Wang Fan, Zhu Xufeng, Li Chongguang, Zhang Yong′an, Xu Wei. Edge Extraction Based on Optical Scanning Holography System with Annular Pupils[J]. Chinese Journal of Lasers, 2019, 46(1): 0109001.