一种数字全息图零级项消除的新方法

计算物理 ›› 2010, Vol. 27 ›› Issue (3): 463-467.

一种数字全息图零级项消除的新方法

柴晓冬¹, 李晓辉²

1. 上海工程技术大学轨道交通学院, 上海 201620;
2. 安徽大学计算智能与信号处理教育部重点实验室, 安徽合肥 230039

收稿日期:2009-02-09 修回日期:2009-10-29 出版日期:2010-05-25 发布日期:2010-05-25
作者简介:柴晓冬(1962-),男,河南固始,教授,主要从事全息成像技术和信号处理的研究.
基金资助:
国家自然科学基金(60572129);上海市教育委员会重点学科建设(J51401)资助项目

A Method for Zero-order Term Elimination in Digital Holography

CHAI Xiaodong¹, LI Xiaohui²

1. College of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China;
2. The Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230039, China

Received:2009-02-09 Revised:2009-10-29 Online:2010-05-25 Published:2010-05-25

摘要/Abstract

摘要： 针对离轴数字全息图中的零级项问题,提出用独立分量分析方法对零级项进行压缩.首先通过CCD获取同一物体的两幅干涉强度不同的全息图构成观测信号,然后采用独立分量分析方法(Independent Component Analysis(ICA))从观测信号中分离出零级项和共轭项,再从获得的共轭项中减去残余的零级项分量,实现零级项的有效压缩,并用模拟结果论证该方法在处理零级项压缩方面的优越性和有效性.

关键词: 信息光学, 光学信号处理, 数字全息图, 独立分量分析, 零级项

Abstract: By using independent component analysis,a suppression method for zero-order term is proposed in off-axis digital holography.At first,two different amplitude frames of holograms are captured by a CCD-camera to form an observation signal.Secondly,a twin-image and a zero-order term are separated by means of independent component analysis.Finally,a separated twinimage is subtracted remnants zero-order term,which eliminates the zero-order term effectively.Computer imitating experiments show that this method is better then actual phase-shift method on advantage and validity.

Key words: information optics, optics signal processing, digital holography, independent component analysis, zero-order term

中图分类号:

O438

柴晓冬, 李晓辉. 一种数字全息图零级项消除的新方法[J]. 计算物理, 2010, 27(3): 463-467.

CHAI Xiaodong, LI Xiaohui. A Method for Zero-order Term Elimination in Digital Holography[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2010, 27(3): 463-467.