基于块重建算法的干涉图延拓技术研究  

Study on the Interferogram Region Spreading Technology Based on Blocks Reconstruction Algorithm

作　　者：苏俊宏[1] 权贵秦[1] 朱日宏[2] 陈磊[2] 

机构地区：[1]西安工业大学光电工程学院,西安710032 [2]南京理工大学电光学院,南京210094

出　　处：《西安工业大学学报》2007年第2期103-106,共4页Journal of Xi’an Technological University

基　　金：国防科工委计量技术基础项目(J182001C002)

摘　　要：用二维快速傅立叶变换（2-DFFT）方法处理干涉图时，由于采样的数据序列长度必须是2”，且要求数据分布域是矩形区域，故须将干涉图的数据范围圆形域扩展延拓成矩形区域．文中提出了一种基于块重建算法的干涉图延拓的原理和方法，利用该方法对一幅实际干涉图进行了延拓．结果表明，该原理方法具有较高的处理精度，为波面相位复原奠定了基础．The circular interferogram must be spread into square region when interferogram is disposed by 2- dimension Fast Fourier Transform （2- DFFT） arithmetic, which requires that sampling data sequence length must be 2n and the data region must be square. The principle and method of interferogram region spreading based on blocks reconstruction algorithm are proposed. This technique has been used in region spreading of an actual interferogram with a satisfactory result. The results indicate that the method has high precision and establishes the foundation to phase recovery.

关 键 词：二维FFT 区域延拓 干涉图 块 重建 

分 类 号：O438.2[机械工程—光学工程]