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| 数字全息干涉法用于变形测量 | |
| 引用本文： | 周灿林,亢一澜.数字全息干涉法用于变形测量[J].光子学报,2004,33(2):171-173. |
| 作者姓名： | 周灿林 亢一澜 |
| 作者单位： | 1. 天津大学力学系,天津,300072;山东大学物理与微电子学院,济南,250061 2. 天津大学力学系,天津,300072 |
| 摘 要： | 介绍了数字全息干涉法的原理,针对激光散斑噪声对包裹干涉相位图样的影响,将小波去噪分析用于图样预处理,可以提高解相精度.用该方法对四周固定、中心加载典型试件的位移进行了测试.实验结果表明,该方法简单、快速、可行. |
| 关 键 词： | 数字全息 小波变换 相位去包裹 干涉计量 去噪 图象处理 |
| 收稿时间： | 2002-02-25 |
| 修稿时间： | 2002年2月25日 |
Deformation Measurement by Digital Holography |
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.Deformation Measurement by Digital Holography[J].Acta Photonica Sinica,2004,33(2):171-173. |
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| Authors: | |
| Institution: | (1 Department of Mechanics of Tianjin University,Tianjin 300072) (2 School of Physics and Microelectronics , Shandong University, Jinan 250061) |
| Abstract: | The interference technique with digital holography is presented. The noise emerges in digital holography when laser is used as light source because of its speckle effect.The wavelet denoising is applied to the wrapped interference phase in order to obtain better precision in course of phase unwrapping.Application of the technique to displacement measurement of a centrally loaded ,fully-clamped circular plate is provided.Experimental result shows this method′s advantages such as simplity, speediness. |
| Keywords: | Digital holography Wavelet transform Phase unwrapping Interferometry metrology Denoising Image processing |
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